Catalogo 3700-8th Iom Lores

Installation, Operation and Maintenance Instructions

Model 3700 8th Edition These instructions also apply to Model 3710.

Pump Safety Tips Safety Apparel: • Insulated work gloves when handling hot bearings or using bearing heater

Operation: • Do not operate below minimum rated flow, or with suction/discharge valves closed

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Heavy work gloves when handling parts with sharp edges, especially impellers

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Safety glasses (with side shields) for eye protection, especially in machine shop areas

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Steel-toed shoes for foot protection when handling parts, heavy tools, etc.

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Other personal protective equipment to protect against hazardous/toxic fluids

Coupling Guards: • Never operate a pump without a coupling guard properly installed Flanged Connections: • Never force piping to make a connection with a pump

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Use only fasteners of the proper size and material Ensure there are no missing fasteners Beware of corroded or loose fasteners

Do not open vent or drain valves, or remove plugs while system is pressurized

Maintenance Safety: • Always lock out power

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Ensure pump is isolated from system and pressure is relieved before disassembling pump, removing plugs, or disconnecting piping

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Use proper lifting and supporting equipment to prevent serious injury

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Observe proper decontamination procedures Know and follow company safety regulations

Observe all cautions and warnings highlighted in pump Installation, Operation and Maintenance Instructions.

FOREWORD This manual provides instructions for the Installation, Operation, and Maintenance of the Goulds Model 3700 8th Edition High Pressure, High Temperature Process Pump designed to meet the requirements of the 8th Edition of API* Standard 610. This manual covers the standard product plus common options that are available. For special options, supplemental instructions are supplied. This manual must be read and understood before installation and maintenance. The design, materials, and workmanship incorporated in the construction of Goulds pumps make them capable of giving long, trouble-free service. The life and satisfactory service of any mechanical unit, however, is enhanced and extended by correct application, proper installation, periodic inspection, condition monitoring and careful maintenance. This instruction manual was prepared to assist operators in understanding the construction and the correct methods of installing, operating, and maintaining these pumps. ITT Industries - Goulds Pumps shall not be liable for physical injury, damage or delays caused by a failure to observe the instructions for Installation, Operation, and Maintenance contained in this manual. Warranty is valid only when genuine ITT Industries - Goulds Pumps parts are used. Use of the equipment on a service other than stated in the order will nullify the warranty, unless written approval is obtained in advance from ITT Industries - Goulds Pumps. Supervision by an authorized ITT Industries - Goulds representative is recommended to assure proper installation. Additional manuals can be obtained by contacting your local ITT Industries - Goulds representative or by calling 1-(800)-446-8537.

THIS MANUAL EXPLAINS n Proper Installation n Start-up Procedures n Operation Procedures n Routine Maintenance n Pump Overhaul n Troubleshooting n Ordering Spare or Repair Parts * American Petroleum Institute 1220 L Street, Northwest Washington, D.C. 20005

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TABLE OF CONTENTS PAGE

SECTION

7

SAFETY

1

9

GENERAL INFORMATION

2

13

INSTALLATION

3

19

OPERATION

4

25

PREVENTIVE MAINTENANCE

5

29

DISASSEMBLY & REASSEMBLY

6

65

SPARE PARTS

7

71

APPENDIX

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SAFETY DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 GENERAL PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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DEFINITIONS This pump has been designed for safe and reliable operation when properly used and maintained in accordance with instructions contained in this manual. A pump is a pressure containing device with rotating parts that can be hazardous. Operators and maintenance personnel must realize this and follow safety measures. ITT Industries - Goulds Pumps shall not be liable for physical injury, damage or delays caused by a failure to observe the instructions in this manual.

NOTE: Operating procedure, condition, etc. which is essential to observe.

EXAMPLES ! s

Pump shall never be operated without coupling guard installed correctly.

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Throughout this manual the words WARNING, CAUTION, and NOTE are used to indicate procedures or situations which require special operator attention:

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WARNING

CAUTION

Throttling flow from the suction side may cause cavitation and pump damage. NOTE: Proper alignment is essential for long pump life.

WARNING

Warning is used to indicate the presence of a hazard which can cause severe personal injury, death, or substantial property damage if the warning is ignored.

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CAUTION

Caution is used to indicate the presence of a hazard which will or can cause minor personal injury or property damage if the warning is ignored.

GENERAL PRECAUTIONS ! s

WARNING

Personal injuries will result if procedures outlined in this manual are not followed.

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NEVER operate pump without coupling guard correctly installed.

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NEVER operate pump beyond the rated conditions to which the pump was sold.

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NEVER start pump without proper prime (sufficient liquid in pump casing).

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NEVER run pump below recommended minimum flow or when dry.

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ALWAYS lock out power to the driver before performing pump maintenance.

• • • •

NEVER operate pump without safety devices installed. NEVER operate pump with discharge valve closed. NEVER operate pump with suction valve closed. DO NOT change conditions of service without approval of an authorized Goulds representative.

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GENERAL INFORMATION PUMP DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 NAMEPLATE INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . 10 RECEIVING THE PUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Storage Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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PUMP DESCRIPTION The Model 3700 8th Edition is a high pressure, high temperature centrifugal pump that meets the requirements of API Standard 610 8th Edition. The model is based on 6 power ends and 38 hydraulic pump sizes. Casing - The casing is a centerline mounted design. The gasket is fully confined. ANSI Class 300 raised face serrated flanges are standard; ANSI Class 300 flat face serrated and ring joint flanges are available. Also available are ANSI class 600 flanges in the same types. Impeller - The impeller is fully enclosed and key driven by the shaft. An impeller bolt with lockwasher or impeller nut with locking set screw prevents axial movement. Seal Chamber Cover - The Model 3700 8th Edition is available with a seal chamber cover meeting API-610 8th Edition and API 682 dimensions for improved performance of mechanical seals.

Power End - Ring oil lubricated bearings are standard. The power end is sealed with labyrinth seals. Pure and purge oil mist lubrication are options. Some machining is required to convert from ring oil lubrication to oil mist. Shaft - The standard shaft is machined and ground to comply with API 610 8th Edition criteria. Bearings - The inboard (radial) bearing carries only radial load; it is free to float axially in the frame. The outboard (thrust) bearing is shouldered and locked to the shaft and retained in the bearing frame to enable it to carry radial and thrust loads. All fits are precision machined to industry standards. The inboard bearing is a single row deep groove ball bearing. The outboard bearing is a duplex angular contact bearing, which uses a pair of single row angular contact ball bearings mounted back-to-back. Baseplate - The fabricated steel baseplate is designed to support the pump, driver and accessories in accordance with API-610 8th Edition requirements. Direction of Rotation - Counterclockwise (left hand) as viewed from the driver, looking at the pump shaft.

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NAMEPLATE INFORMATION

Fig. 1 Every pump has a Goulds nameplate that provides information about the pump. The nameplate is located on the pump casing.

are expressed in English units. Note the format of pump size: Discharge x Suction - Nominal Impeller Diameter in inches, for example, 2x3-13 (Fig. 1).

Special tags which provide additional information (mechanical seal data, etc.) and special tagging required by customers are located on the pump casing or on the bearing frame.

The standard nameplate is also available in a version which expresses the rating and hydrostatic test pressure in metric units (Fig. 2).

The standard nameplate provides information about the pump’s size, rating, bearings, serial number, hydrostatic test pressure of pressure containment parts, maximum allowable working pressure at designated temperature and construction / customer’s item number. Rating and hydrostatic test pressure

When ordering spare parts you will need to identify pump model, size, serial number, and the item number of required parts. Pump information can be taken from the Goulds nameplate. Item numbers can be found in this manual.

Fig. 2

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RECEIVING THE PUMP Inspect the pump as soon as it is received. Carefully check that everything is in good order. Make notes of damaged or missing items on the receipt and freight bill. File any claims with the transportation company as soon as possible.

Baseplate mounted units with or without drivers are moved with slings through the baseplate’s lifting lugs (Fig. 4 & 5).

STORAGE REQUIREMENTS Short Term (Less than 6 months) Goulds normal packaging procedure is designed to protect pump during shipping. Upon receipt, store in a covered and dry location. Long Term (More than 6 months) Preservative treatment of bearings and machined surfaces will be required. Rotate shaft several times every 3 months. Refer to driver and coupling manufacturers for their long term storage procedures. Store in a covered and dry location.

NOTE: Long term storage treatment may be purchased with initial pump order.

Fig. 4

HANDLING ! s

WARNING

Pump and components are heavy. Failure to properly lift and support equipment could result in serious physical injury, or damage to pumps. Use care when moving pumps. Lifting equipment must be able to adequately support the entire assembly. Hoist bare pump using suitable slings under the outboard end of the bearing frame and under the suction flange (Fig. 3).

Fig. 5

Fig. 3

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INSTALLATION GENERAL . . . . . . . . . . . . . . . . . . . SITE/FOUNDATION . . . . . . . . . . . . . . BASEPLATE INSTALLATION PROCEDURE. Baseplate Preparation . . . . . . . . . . . Foundation Preparation . . . . . . . . . . Setting and Leveling Baseplate. . . . . . . ALIGNMENT AND ALIGNMENT CRITERIA . General Considerations . . . . . . . . . . Alignment Criteria . . . . . . . . . . . . . ALIGNMENT TROUBLESHOOTING . . . . . BASEPLATE GROUTING PROCEDURE . . . General Procedure . . . . . . . . . . . . . Alignment Check . . . . . . . . . . . . . . PIPING . . . . . . . . . . . . . . . . . . . . . Suction Piping . . . . . . . . . . . . . . . Discharge Piping . . . . . . . . . . . . . . Bypass Piping . . . . . . . . . . . . . . . Auxiliary Piping . . . . . . . . . . . . . . . Final Piping Check . . . . . . . . . . . . .

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GENERAL Procedures for installation described within this section are general in nature. It is assumed that the installer has a basic knowledge of acceptable methods. More detailed procedures are described in various publi-

cations, including API Recommended Practice 686/ PIP (Process Industry Practices) REIE 686, “Recommended Practices for Machinery Installation and Installation Design.”

SITE/FOUNDATION A pump should be located near the supply of liquid and have adequate space for operation, maintenance, and inspection. Be sure to allow for crane or hoist service.

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Baseplate mounted pumps are normally grouted on a concrete foundation which has been poured on a solid footing. The foundation must be able to absorb any vibration and to form a permanent, rigid support for the pumping unit.

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The location and size of foundation bolts are shown on the outline assembly drawing provided with the pump data package. Foundation bolts commonly used are sleeve type (Fig. 6) and J type. If using the sleeve type, the inside diameter of the sleeve should be 2 1/2 - 3 times the bolt diameter. A washer should be placed between the bolt head and the sleeve. Both foundation bolt types permit movement for final bolt adjustment.

Fig. 6

BASEPLATE INSTALLATION PROCEDURE Industry standard procedures, such as API RP 686/ PIP REIE 686, and/or the following procedure should be followed prior to grouting the baseplate. The procedure assumes the installer has a basic knowledge of baseplate and foundation design and installation methods.

BASEPLATE PREPARATION 1. Inspect all surfaces of baseplate that will contact grout for contamination (e.g. - rust, oil, grime, etc.). 2. Thoroughly clean all surfaces of the baseplate that will contact grout with a cleaner that will not leave any residue.

NOTE: It may be necessary to sandblast the contact surfaces and coat with a primer compatible with the grout. If sandblasting is necessary, remove all equipment prior to sandblasting.

2. Remove water and/or debris from foundation bolt holes/sleeves. If the sleeve type bolts are being used, fill the sleeves with nonbinding moldable material and seal to prevent grout from entering. 3. Coat exposed portion of anchor bolts with a non-bonding compound such as paste wax to prevent grout from adhering to anchor bolts.

NOTE: Do not use oils or liquid wax. 4. If recommended by grout manufacturer, coat foundation surface with a compatible primer.

SETTING AND LEVELING BASEPLATE 1. Lower baseplate carefully onto foundation bolts (Fig. 7).

3. Inspect all machined surfaces for burrs, rust, paint or any other type of contamination. If necessary, use a honing stone to remove burrs.

FOUNDATION PREPARATION 1. Chip top of foundation a minimum of 25 mm (1.0 in.) to remove porous or low strength concrete. If using a pneumatic hammer, assure that it is not contaminating the surface with oil, moisture, etc.

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CAUTION

Do not use heavy tools such as jackhammers, as they could damage the structural integrity of the foundation.

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Fig. 7

2. Use leveling (jack) screws to raise bottom edge of the baseplate 25 - 50 mm (1-2 in.) above foundation to allow for adequate grouting. This will provide even support for the baseplate once it is grouted.

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3. Level baseplate to within 0.20 mm/m (.002 in./ft.) of length or width of the baseplate, respectively, by adjusting leveling screws. Maximum total variation from one end or side of the baseplate to the other is 0.38 mm (.015 in.). Equipment mounting surfaces should be utilized to establish level.

4. Coat portions of leveling screws that will contact grout with a non-bonding compound such as paste wax to facilitate their removal after grouting.

NOTE: Do not use oils or liquid wax. 5. Thread nuts on foundation bolts and hand tighten.

ALIGNMENT AND ALIGNMENT CRITERIA GENERAL CONSIDERATIONS ! s

WARNING

Before beginning any alignment procedure, make sure driver power is locked out. Failure to lock out driver power will result in serious physical injury. To remove coupling guard, refer to coupling guard installation and disassembly instructions in Appendix I. The times at which alignment is checked and adjusted are: Initial Alignment (Cold Alignment) is done prior to operation when the pump and the driver are at ambient temperatures.

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Before Grouting Baseplate - To ensure alignment can be obtained.

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After Connecting Piping and Grouting Baseplate - To ensure pipe strains haven’t altered alignment.

Final Alignment (Hot Alignment) is done after operation when the pump and driver are at operating temperatures.

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After First Run - To obtain correct alignment when both pump and driver are at operating temperature. Thereafter, alignment should be checked periodically in accordance with plant operating procedures. NOTE: Alignment check must be made if process temperature changes, piping changes and/or pump service is performed. Alignment is achieved by adding or removing shims from under the driver and/or shifting driver horizontally as needed.

NOTE: Proper alignment is the responsibility of the installer and user of the unit. Accurate alignment of the equipment must be attained. Trouble-free operation can be accomplished by achieving alignment within the levels specified in the following section.

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Three common alignment methods are utilized:

• •

Reverse Dial Indicator method is most common.

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Dial Indicator (rim-and-face) method.

Laser method is similar to reverse dial indicator method, but uses a laser to obtain the necessary measurements.

Follow alignment equipment manufacturers’ procedures when utilizing reverse dial indicator or laser methods. A detailed procedure for alignment using the dial indicator (rim-and-face) method is included as Appendix II.

ALIGNMENT CRITERIA Good alignment is attained when readings as specified in this section have been achieved with pump and driver at operating temperatures (final alignment). Table 1 shows maximum allowable Total Indicator Reading (T.I.R.) for parallel and angular misalignment.

Table 1 Maximum Allowable Parallel and Angular Misalignment Group

All

Maximum Allowable Misalignment Parallel Angular 0.03 degrees [0.125 mm/cm 0.05 mm (.0005 in. /in.) of cou(.002 in.) pling face diameter]

NOTE A: For electric motors, motor shaft initial (cold) parallel vertical alignment setting should be 0.05 - 0.10 mm (.002-.004 in.) lower than pump shaft. NOTE B: For other drivers (turbines, engines, etc.), follow driver manufacturers’ recommendations.

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ALIGNMENT TROUBLESHOOTING Problem

Probable Cause Driver feet bolt bound.

Cannot obtain horizontal (Side-to-Side) alignment, angular or parallel

Baseplate not leveled properly, probably twisted.

Cannot obtain vertical (Top-to-Bottom) alignment, angular or parallel

Baseplate not leveled properly, probably bowed.

Remedy Loosen pump hold down bolts and slide pump and driver until horizontal alignment is achieved. Determine which corner(s) of the baseplate are high or low and adjust leveling screws at the appropriate corner(s) and realign. Determine if center of baseplate should be raised or lowered and correct by adjusting leveling screws equally at the center of the baseplate.

BASEPLATE GROUTING PROCEDURE GENERAL PROCEDURE Use of non-shrink epoxy grout is recommended.

NOTE: Grout manufacturer’s instructions should be consulted and followed. The following are general procedures for grouting baseplates. Additional information may be found in API Standard 610, 8th Edition, Appendix L, API RP 686, Chapter 5, and other industry standards.

3. Strike along top of dam with trowel to give a neat finished appearance. 4. Allow grout to set. 5. Fill remainder of baseplate with grout, removing air as before (Fig. 9).

Baseplate Installation Procedure should be followed prior to grouting baseplate. 1. Build dam (form) around foundation to level of bottom of baseplate (Fig. 8).

Fig. 9 6. Allow grout to set at least 48 hours. Leveling screws should be removed when grout has hardened. 7. Tighten foundation bolts. Fig. 8 2. Pour grout through grout hole in baseplate, up to level of dam. Remove air bubbles from grout as it is poured by puddling or by pumping the grout into place.

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ALIGNMENT CHECK Re-check alignment before continuing, using criteria previously stated.

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PIPING Guidelines for piping are given in the “Hydraulic Institute Standards,” available from: Hydraulic Institute 30200 Detroit Road Cleveland, OH 44145-1967 and in API RP 686, and must be reviewed prior to pump installation.

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WARNING

Never draw piping into place by forcing at the flanged connections of the pump. This may impose dangerous strains on the unit and cause misalignment between pump and driver. Pipe strain will adversely affect the operation of the pump resulting in physical injury and damage to the equipment. 1. Piping runs should be as short as possible to minimize friction losses. 2. It is suggested that expansion loops be properly designed and installed in suction and/or discharge lines when handling liquids at elevated temperatures, so thermal expansion of piping will not draw pump out of alignment. 3. The piping should be arranged to allow pump flushing prior to removal of the unit on services handling hazardous liquids. 4. Carefully clean all pipe parts, valves and fittings, and pump branches prior to assembly. 5. All piping must be supported independently of, and line up naturally with, the pump flanges. Table 2 shows piping flange alignment criteria.

Table 2 Piping Flange Alignment Type Axial Parallel Concentric

Criteria Flange gasket thickness ± 0.8 mm (.03 in.). 0.001 mm/mm (.001 in./in.) of flange diameter to a maximum of 0.8 mm (.03 in.). Flange bolts should easily install by hand.

In no case should loads on the pump flanges exceed the limits stated in API Standard 610, 8th Edition. 6. Piping must not be connected to the pump until the grout has thoroughly hardened and the foundation bolts, as well as driver and pump holddown bolts, have been tightened.

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SUCTION PIPING CAUTION ! s NPSHA must always exceed NPSHR as shown on Goulds performance curves received with order. (Reference Hydraulic Institute for NPSH and pipe friction values needed to evaluate suction piping). Properly designed and installed suction piping is a necessity for trouble-free pump operation. Suction piping should be flushed BEFORE connection to the pump. 1. Use of elbows close to the pump suction flange should be avoided. There should be a minimum of two (2) pipe diameters of straight pipe [five (5) pipe diameters is preferred] between the elbow and suction inlet. Where used, elbows should be long radius. 2. Use suction pipe one (1) or two (2) sizes larger than the pump suction, with a reducer at the suction flange. Suction piping should never be of smaller diameter than the pump suction. 3. Reducers, if used, should be eccentric and located at the pump suction flange with sloping side down. 4. Pump must never be throttled on suction side. 5. A suction screen should be installed prior to initial start-up and when suction system has been opened for work. The screen should be of the cone type with a net area equal to at least three (3) times the cross sectional area of the suction pipe. The mesh of the screen should be sized to prevent particles larger than 1.6 mm (1/16 in.) from entering the pump and should be installed in a spool piece to allow removal for cleaning. The screen should remain in the system until periodic inspection shows system is clean. 6. Separate suction lines are recommended when more than one pump is operating from the same source of supply. Suction Lift Conditions 1. Suction pipe must be free from air pockets. 2. Suction piping must slope upwards to pump. 3. All joints must be air tight. 4. A means of priming the pump must be provided.

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Suction Head/Flooded Suction Conditions 1. An isolation valve should be installed in the suction line at least two (2) pipe diameters from the pump suction to permit closing of the line for pump inspection and maintenance.

BYPASS PIPING

2. Keep suction pipe free from air pockets.

A minimum flow orifice can be sized and installed in bypass line to preclude bypassing excessive flows. Consult nearest sales office or factory for assistance in sizing orifice.

3. Piping should be level or slope gradually downward from the source of supply. 4. No portion of the piping should extend below pump suction flange. 5. The size of entrance from supply should be one (1) or two (2) sizes larger than the suction pipe. 6. The suction pipe must be adequately submerged below the liquid surface to prevent vortices and air entrainment at the supply.

DISCHARGE PIPING Properly designed and installed discharge piping is a necessity for trouble-free pump operation. Discharge piping should be flushed BEFORE connection to the pump. 1. Isolation and check valves should be installed in discharge line. Locate the check valve between isolation valve and pump; this will permit inspection of the check valve. The isolation valve is required for priming, regulation of flow, and for inspection and maintenance of pump. The check valve prevents pump or seal damage due to reverse flow through the pump when the driver is turned off. 2. Increasers, if used, should be placed between pump and check valves. 3. Cushioning devices should be used to protect the pump from surges and water hammer if quick-closing valves are installed in system.

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Systems that require operation at reduced flows for prolonged periods should be provided with a bypass line connected from the discharge side (before any valves) to the source of suction.

An automatic recirculation control valve and/or solenoid operated valve should be considered if a constant bypass (i.e. orifice) is not possible.

AUXILIARY PIPING Auxiliary piping may be required for bearing cooling, seal chamber cover cooling, mechanical seal flush or other special features supplied with the pump. Consult pump data sheet for specific auxiliary piping recommendations. If bearing cooling and/or seal chamber cover cooling is required, follow guidelines listed below. 1. Flows of 4 l/min. (1 GPM) will generally satisfy cooling requirements for each component. If both bearing and seal chamber cover cooling are provided, a minimum flow of 8 l/min. (2 GPM) will be necessary. 2. Cooling water pressure should not exceed 7.0 kg/cm2 (100 psig).

FINAL PIPING CHECK After connecting the piping to pump: 1. Rotate shaft several times by hand to be sure that there is no binding and all parts are free. 2. Check alignment, per alignment criteria outlined previously, to determine if pipe strain has affected alignment. If pipe strain exists, correct piping.

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OPERATION PREPARATION FOR START-UP . . . . Checking Rotation . . . . . . . . . . Coupling Pump and Driver . . . . . . Lubricating Bearings . . . . . . . . . Shaft Sealing . . . . . . . . . . . . . Priming Pump . . . . . . . . . . . . Start-up Precautions . . . . . . . . . STARTING PUMP . . . . . . . . . . . . OPERATION. . . . . . . . . . . . . . . General Considerations . . . . . . . Operational Checks . . . . . . . . . Operating at Reduced Capacity . . . Operating Under Freezing Conditions SHUTDOWN . . . . . . . . . . . . . . . FINAL ALIGNMENT . . . . . . . . . . . DOWELING PUMP CASING . . . . . .

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PREPARATION FOR START-UP CHECKING ROTATION CAUTION s !

COUPLING PUMP AND DRIVER ! s

Lock out driver power to prevent accidental rotation and physical injury.

Serious damage may result if pump is run in the wrong rotation. 1.

Lock out power to driver.

1.

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Install and lubricate coupling per manufacturer’s instructions.

2.

Install coupling guard. Refer to coupling guard installation instructions in Appendix I.

WARNING

Lock out driver power to prevent accidental start-up and physical injury. 2.

WARNING

Make sure coupling hubs are securely fastened to shafts.

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WARNING

Do NOT jog a coupled pump.

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WARNING

Never operate a pump without coupling guard properly installed. Refer to Appendix I for coupling guard installation instructions. Personal injury will occur if pump is run without coupling guard.

NOTE: Pump is shipped with coupling spacer removed. 3.

Unlock driver power.

4.

Make sure everyone is clear. Jog driver just long enough to determine direction of rotation. Rotation must correspond to arrow on bearing frame.

5.

Lock out power to driver.

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LUBRICATING BEARINGS Ring Oil Lubrication Ring oil lubricated ball bearings are standard on Model 3700 8th Edition units. The bearings are not lubricated at the factory. Assure that oil rings are properly seated in grooves in shaft, as described in Disassembly & Reassembly section. See Preventive Maintenance section for lubrication recommendations. Pure or Purge Oil Mist Lubrication Pure or purge oil mist are optional features for the Model 3700 8th Edition. Follow oil mist generator manufacturer’s instructions. The inlet and outlet connections are located on the top and bottom, respectively, of the bearing frame.

Connection of Sealing Liquid For satisfactory operation, there must be a liquid film between seal faces to lubricate them. Refer to seal manufacturer’s drawing for location of taps. Some methods which may be used to flush/cool the seal are:

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Product Flushing - In this arrangement, the pumpage is piped from the casing (and cooled in an external heat exchanger when required) then injected into seal chamber.

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External Flush - A clean, cool compatible liquid is injected from an outside source directly into seal chamber. Flushing liquid must be at a pressure 0.35-1.05 kg/cm2 (5-15 psi) greater than seal chamber pressure. Injection rate should be 2-8 l/min. (12-2 GPM).

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Other methods may be used which make use of multiple gland connections and/or seal chamber connections. Refer to documentation supplied with the pump, mechanical seal reference drawing, and piping diagrams.

See Preventive Maintenance section for lubrication recommendations and connection locations.

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WARNING

Operation of the unit without proper lubrication will cause bearing failure and pump seizure.

SHAFT SEALING WITH MECHANICAL SEAL Pumps may be shipped with or without mechanical seal installed. Cartridge type mechanical seals are commonly used for this model. Cartridge seals are preset at the seal manufacturer’s facility and require no field settings. Cartridge seals installed by the user require disengagement of the holding clips prior to operation, allowing the seal to slide into place. If the seal has been installed in the pump by Goulds, these clips have already been disengaged. For other types of mechanical seals, refer to the seal manufacturer’s instructions for installation and setting.

PRIMING PUMP Never start the pump until it has been properly primed. Several different methods of priming can be used, depending upon type of installation and service involved. Suction Supply Above Pump 1. Slowly open the suction valve (Fig. 10). 2.

Open air vents on the suction and discharge piping, casing, seal chamber, and seal piping, if provided, until all air is vented and only liquid flows out.

3.

Close the vents.

Fig. 10

20

3700-8th IOM 12/04

Suction Supply Below Pump A foot valve and outside source of liquid may be used to prime the pump. Outside source of liquid can come from a priming pump, pressurized discharge line, or other supply (Fig. 11 and 12).

1.

Close discharge valve and open air vents in suction and discharge piping, casing, seal chamber and seal piping, if provided.

2.

Open valve in outside supply line until all air is vented and only liquid flows out.

! s

WARNING

When handling hazardous and/or toxic fluids, proper personal protective equipment is required. If pump is being drained, precautions must be taken to prevent physical injury. Pumpage must be handled and disposed of in conformance with applicable regulations. 3.

Close the vents and then the outside supply line.

Other Methods of Priming Pump • Priming by ejector.

•

Priming by automatic priming pump.

START-UP PRECAUTIONS 1.

All equipment and personal safety related devices and controls must be installed and operating properly.

2.

To prevent premature pump failure at initial start-up due to dirt or debris in the pipe system, ensure the pump can be run continuously at full speed and flow for 2 to 3 hours.

3.

Variable speed drivers should be brought to rated speed as quickly as possible.

4.

Variable speed drivers should not be adjusted or checked for speed governor or overspeed trip settings while coupled to the pump at initial start-up. If settings have not been verified, uncouple the unit and refer to driver manufacturer’s instructions for assistance.

5.

Running a new or rebuilt pump at slow speeds may not provide enough flow to adequately flush and cool the wear ring and seal chamber cover bushing close running surfaces.

6.

Pumpage temperatures in excess of 93° C (200° F) will require warm-up of pump prior to operation. Circulate a small amount of pumpage through the pump until the casing temperature is within 56° C (100° F) of the pumpage temperature and evenly heated.

Fig. 11

Fig. 12

NOTE: Warm-up rate should not exceed 1.4° C (2.5° F) per minute.

3700-8th IOM 12/04

21

STARTING PUMP 1.

Make sure suction valve and any recirculation or cooling lines are open.

2.

Fully close or partially open discharge valve as dictated by system conditions.

3.

Start driver.

! s

4.

Slowly open discharge valve until the desired flow is obtained.

! s

CAUTION

Observe pump for vibration levels, bearing temperature and excessive noise. If normal levels are exceeded, shut down and resolve.

CAUTION

Immediately observe pressure gauges. If discharge pressure is not quickly attained, stop driver, reprime and attempt to restart.

OPERATION GENERAL CONSIDERATIONS

6.

Establish baseline vibration readings to determine normal running conditions. If it is determined that the unit is running rough, consult factory.

7.

Monitor all gauges to ensure pump is running at or near rating and that suction screen (when used) is not clogged.

Always vary capacity with regulating valve in the discharge line. NEVER throttle flow from the suction side. Driver may overload if the pumpage specific gravity (density) is greater than originally assumed, or the rated flow rate is exceeded. Always operate the pump at or near the rated conditions to prevent damage resulting from cavitation or recirculation.

OPERATING AT REDUCED CAPACITY ! s

Do NOT operate pump below minimum rated flows or with discharge valve closed. These conditions may create an explosive hazard due to vaporization of pumpage and can quickly lead to pump failure and physical injury.

OPERATIONAL CHECKS The following are minimum operational checks for the pump only. Consult driver and auxiliary equipment manufacturers’ literature for additional information. 1.

2.

On ring oil lubricated units, remove oil ring viewing port plugs to verify that oil rings are properly positioned in grooves on shaft, are turning and are throwing oil. Replace plugs. On pure or purge oil mist lubricated units, remove viewing port plugs and assure oil mist is flowing properly. Replace plugs.

3.

On ring oil and purge oil mist lubricated units, check oiler to ensure oil level has remained steady.

4.

Check bearing temperatures using a pyrometer or other accurate temperature measuring device. Monitor bearing temperature frequently during initial operation to determine if a bearing problem exists as well as to establish normal bearing operating temperature.

5.

22

On units equipped with auxiliary piping, assure that proper flows have been established and that equipment is operating properly.

WARNING

Damage occurs from:

•

Increased vibration levels - Affects bearings, seal chambers, and mechanical seals.

•

Increased radial load - Increases stress on shaft and bearings.

•

Heat build up - vaporization causes rotating parts to score or seize.

•

Cavitation - Increases damage to internal surfaces of pump.

OPERATING UNDER FREEZING CONDITIONS Exposure to freezing conditions while pump is idle could cause liquid to freeze and damage the pump. Liquid inside pump should be drained. Liquid inside auxiliary piping, if supplied, should also be drained.

3700-8th IOM 12/04

SHUTDOWN 1.

Slowly close discharge valve.

2.

Shut down and lock out driver to prevent accidental rotation.

s !

WARNING

When handling hazardous and/or toxic fluids, proper personal protective equipment is required. If pump is being drained, precautions must be taken to prevent physical injury. Pumpage must be handled and disposed of in conformance with applicable regulations.

FINAL ALIGNMENT 1.

Run the unit under actual operating conditions for a sufficient length of time to bring the pump and driver and associated systems to operating temperature.

3.

Remove coupling guard. Refer to coupling guard installation and disassembly instructions in Appendix I.

2.

Shut down and lock out driver as described above.

4.

Check alignment while unit is still hot per alignment criteria in Section 3.

5.

Reinstall coupling guard. Refer to coupling guard installation and disassembly instructions in Appendix I.

! s

WARNING

Before beginning any alignment procedure, make sure driver power is locked out. Failure to lock out driver power will result in serious physical injury.

DOWELING PUMP CASING The pump casing may be doweled to the baseplate pedestals, if desired, to positively maintain position. Two (2) Number 7 taper pins are supplied for this purpose.

2.

Ream the holes with a Number 7 taper pin reamer to the proper fit with the taper dowel pins. Pins should insert to a depth that leaves only the threaded portion exposed when fully seated.

NOTE: Doweling should only be done after final alignment has been completed.

3.

Seat taper pins firmly in holes with hardwood block or soft faced hammer.

1.

Drill two holes, one in each casing mounting pad, at the locations provided, using a 21/64 in. or “Q” size drill.

s !

CAUTION

Failure to remove the dowel pins prior to casing removal may result in casing damage.

The holes should be drilled through both the casing mounting pads and the baseplate pedestal, when possible. This makes cleaning the metal chips produced from the drilling and reaming operations easier. Take care to clean all burrs and metal chips from the holes.

s !

CAUTION

If water cooled pedestals have been provided, do NOT drill through the baseplate pedestal or leakage of cooling water will occur.

3700-8th IOM 12/04

23

24

3700-8th IOM 12/04

PREVENTIVE MAINTENANCE GENERAL COMMENTS. . . . . . . . . . . . . . . . . . MAINTENANCE SCHEDULE . . . . . . . . . . . . . . . Routine Maintenance . . . . . . . . . . . . . . . . . . Routine Inspections . . . . . . . . . . . . . . . . . . 3 Month Inspections . . . . . . . . . . . . . . . . . . Annual Inspections . . . . . . . . . . . . . . . . . . . MAINTENANCE OF BEARINGS . . . . . . . . . . . . . Ring Oil Lubricated Bearings . . . . . . . . . . . . . . Pure or Purge Oil Mist Lubricated Bearings (Optional) . MAINTENANCE OF SHAFT SEALS . . . . . . . . . . . TROUBLESHOOTING. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . .

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25 25 25 25 25 25 26 26 27 27 28

GENERAL COMMENTS A routine maintenance program can extend the life of your pump. Well maintained equipment will last longer and require fewer repairs. You should keep maintenance records as this will help pinpoint potential causes of problems.

5

MAINTENANCE SCHEDULE ROUTINE MAINTENANCE

3 MONTH INSPECTIONS

• • • • •

• •

Check foundation and hold-down bolts for tightness.

•

Oil should be changed at least every 3 months (2000 hours) or more often if there are any adverse atmospheric conditions or other conditions which might contaminate or break down the oil. Oil should also be changed if it is cloudy or contaminated.

•

Check shaft alignment and realign if required.

Bearing lubrication Seal monitoring Vibration analysis Discharge pressure monitoring Temperature monitoring

ROUTINE INSPECTIONS •

Check for unusual noise, vibration and bearing temperatures.

• •

Inspect pump and piping for leaks. Check seal chamber for leakage.

3700-8th IOM 12/04

If pump has been left idle, check mechanical seal. Repair or replace if required.

ANNUAL INSPECTIONS •

Check pump capacity, pressure and power. If pump performance does not satisfy your process requirements, and process requirements have not changed, pump should be disassembled, inspected, and worn parts should be replaced. Otherwise, a system inspection should be done.

25

MAINTENANCE OF BEARINGS RING OIL LUBRICATED BEARINGS Ring oil lubricated ball bearings are standard on Model 3700 8th Edition pumps.

! s

WARNING

Pumps are shipped without oil. Oil lubricated bearings must be lubricated at the job site. A high quality turbine oil with rust and oxidation inhibitors should be used. For the majority of operational conditions, bearing temperatures will run between 50° C (120° F) and 82° C (180° F). In this range, an oil of ISO viscosity grade 68 at 40° C (100° F) is recommended. If bearing temperatures exceed 82° C (180° F), use oil of ISO viscosity grade 100. Bearing temperatures are generally about 11° C (20° F) higher than bearing housing outer surface temperature. Some acceptable oils are: Exxon Teresstic EP 68 Mobil

Mobil DTE 26 300 SSU @ 40° C (100° F)

Sunoco

Sunvis 968

Royal Purple

SYNFILM ISO VG 68 Synthetic Lube

Fig. 13

NOTE: Setting dimension of 0 may be accomplished by removing and discarding the oiler adjusting stem. Oil reservoir in bearing frame should be filled by filling oiler bottle with oil and placing it into the oiler housing. Several fillings of the oiler bottle will be required. Do not fill bearing frame oil reservoir through the vent or through the oiler housing without using the bottle. Oil capacities and oiler information for the various bearing frames are shown in Table 3.

For extreme conditions, refer to the factory or a lubrication expert.

Table 3 Bearing Frame Oil Capacities

Oil should be changed after 200 hours if bearings are new. Thereafter, change oil every 2000 operating hours or 3 months, whichever first occurs. Ring oil lubricated pumps are supplied with an oiler which maintains a constant oil level in the bearing housing. The oiler must be adjusted to maintain the oil at the level of the mark on the side of the frame, which corresponds to the center of the bullseye sight glass. This is accomplished by setting the oiler adjusting stem. Refer to Fig. 13 for proper setting dimensions.

Frame Oil Capacity Group

ml

Ounces

SA SX MA LA, MX LX XLX

600 1115 950 1385 2120 2625

20 38 32 47 72 89

Trico Oiler No.

ml

Oiler Capacity Ounces

5

237

8

Verify the correct oil level by comparing the oil level as viewed in the bullseye sight glass with the oil level line on the side of the bearing frame.

26

3700-8th IOM 12/04

OPTIONAL PURE OR PURGE OIL MIST LUBRICATED BEARINGS ! s

WARNING

2.

Connect oil mist supply lines to inlet connections (Fig. 14).

3.

Connect drain/vent lines to outlet connections.

Pumps are shipped without oil. Oil mist lubricated bearings must be lubricated at the job site. The same oil requirements applicable to ring oil lubricated bearings also apply to oil mist lubricated bearings. For purge oil mist lubricated bearings, bearing frame should be filled to the proper level as described under ring oil lubricated bearings. Below are listed the steps necessary for oil mist lubrication: 1.

Follow oil mist system supplier’s instructions. Fig. 14

5

MAINTENANCE OF SHAFT SEALS When mechanical seals are furnished by Goulds, a manufacturer’s reference drawing is supplied with the data package. This drawing should be kept for future use when performing maintenance and adjusting the seal. The seal drawing will also specify required flush liquid and attachment points. The seal and all flush piping must be checked and installed as needed prior to starting the pump.

The life of a mechanical seal depends on various factors such as cleanliness of the liquid handled and its lubricating properties. Due to the diversity of operating conditions it is, however, not possible to give definite indications as to its life.

! s

WARNING

NEVER operate the pump without liquid supplied to mechanical seal. Running a mechanical seal dry, even for a few seconds, can cause seal damage and must be avoided. Physical injury can occur if mechanical seal fails.

3700-8th IOM 12/04

27

TROUBLESHOOTING Problem

Probable Cause Pump not primed.

No liquid delivered.

Pump not producing rated flow or head.

Suction line clogged. Impeller clogged with foreign material. Foot valve or suction pipe opening not sufficiently submerged. Suction lift too high. Air leak thru gasket. Air leak thru seal chamber. Impeller partly clogged. Worn wear rings. Insufficient suction head. Worn or broken impeller. Wrong direction of rotation.

Pump starts then stops pumping.

Bearings run hot.

Improperly primed pump. Air or vapor pockets in suction line. Air leak in suction line. Improper alignment. Improper lubrication. Insufficient cooling liquid. Improper pump/driver alignment. Partly clogged impeller causing imbalance. Broken or bent impeller or shaft. Impeller out of balance.

Pump is noisy or vibrates.

Foundation not rigid.

Excessive leakage from stuffing box.

Worn bearings. Suction or discharge piping not anchored or properly supported. Pump is cavitating. Worn mechanical seal parts. Overheating mechanical seal. Head lower than rating. Pumps too much liquid.

Motor requires excessive power.

28

Liquid heavier than expected. Rotating parts bind.

Remedy Check that pump and suction line are full of liquid. Reprime pump. Remove obstructions. Back flush pump to clean impeller. Consult factory for proper depth. Use baffle to eliminate vortices. Reduce suction lift. Replace gasket. Replace or readjust mechanical seal. Back flush pump to clean impeller. Replace defective part as required. Ensure that suction line shutoff valve is fully open and line is unobstructed. Increase suction head. Inspect and replace if necessary. Change rotation to concur with direction indicated by arrow on bearing frame. Reprime pump. Rearrange piping to eliminate air pockets. Repair (plug) leak. Re-align pump and driver. Check lubricant for suitability and quantity. Check cooling system. Align shafts. Backflush pump to clean impeller. Replace as required. Balance impeller. Assure uniform contact of pump and/or supports with foundation. Replace. Anchor per Hydraulic Institute Standards/ API RP 686 recommendations. Locate and correct system problem. Replace mechanical seal. Check lubrication and cooling lines. Consult factory. Install throttle valve. Cut impeller. Check specific gravity and viscosity. Check internal wear parts for proper clearances.

3700-8th IOM 12/04

DISASSEMBLY & REASSEMBLY REQUIRED TOOLS . . . . . . . . . DISASSEMBLY . . . . . . . . . . . INSPECTIONS. . . . . . . . . . . . RENEWAL OF WEAR PARTS . . . REASSEMBLY . . . . . . . . . . . ASSEMBLY TROUBLESHOOTING .

. . . . . .

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. . . . . .

29 29 36 42 45 57

REQUIRED TOOLS • • • • • •

Open end wrenches Lifting sling Induction bearing heater Brass drift punch Spanner wrench

• • • • •

Torque wrench with sockets Dial indicator Micrometers (inside and outside) Cleaning agents Feeler gauges

• • • • •

Drill Tap Spanning type puller Soft face hammer Press

Allen wrenches

6

DISASSEMBLY ! s

WARNING

Pump components are heavy. Proper methods of lifting and securing must be employed to avoid physical injury and/or equipment damage.

! s

WARNING

The Model 3700 8th Edition may handle hazardous and/or toxic fluids. Proper personal protection is required. Precautions must be taken to prevent physical injury. Pumpage must be handled and disposed of in conformance with applicable regulations. NOTE: Before disassembling the pump for overhaul, ensure all replacement parts are available.

! s

1.

Shut off all valves controlling flow to and from pump.

! s

WARNING

Operator must be aware of pumpage and safety precautions to prevent physical injury. 2.

Drain liquid from piping; flush pump if necessary.

3.

Disconnect all auxiliary piping, tubing and equipment that will interfere with removal of back pull-out assembly.

4.

Remove oiler bottle (251) and store in a safe place.

5.

Remove oil drain plug (408A) at bottom of bearing frame (228) and drain oil. Dispose of oil in accordance with applicable regulations.

6.

Remove coupling guard. Refer to coupling guard installation and disassembly instructions in Appendix I.

7.

Remove coupling spacer. Follow coupling manufacturer’s instructions for assistance.

WARNING

Lock out power supply to driver to prevent accidental startup and physical injury.

3700-8th IOM 12/04

PREPARATION FOR DISASSEMBLY

29

REMOVAL OF BACK PULL-OUT ASSEMBLY 1.

Secure to prevent movement during transport. Transport back pull-out assembly to a clean work area for further disassembly.

6.

Support and secure back pull-out assembly firmly to workbench.

Loosen and remove casing stud nuts (425).

! s

WARNING

If necessary to use heat to remove parts, assure that all liquid has been drained and that any vapor has been removed. A method for accomplishing such removal is to purge casing, seal chamber, etc. with dry compressed air or inert gas. 2.

5.

Separate back pull-out assembly from casing (100) by tightening jacking bolts (418) provided. Tighten jacking bolts evenly using alternating pattern (Fig. 15).

REMOVAL OF IMPELLER 1.

Loosen set screw (198A) in end of impeller nut (304) (Fig. 17).

2.

Loosen and remove impeller nut (304).

NOTE: Impeller nut has LEFT HAND threads.

NOTE: Penetrating oil may be used if seal chamber cover to casing joint is excessively corroded.

Fig 17

Fig. 15 3.

Remove back pull-out assembly using lifting sling through bearing frame or other suitable means (Fig. 16).

! s

WARNING

Pump components are heavy. Proper methods of lifting and securing must be employed to avoid physical injury and/or equipment damage.

3.

Pull impeller (101) from shaft (122). Use a spanning type puller if required.

s !

CAUTION

When handling the impeller, wear heavy work gloves to prevent cutting hands on sharp edges. 4.

Remove impeller key (178).

REMOVAL OF COUPLING HUB

Fig. 16 4.

30

1.

Coupling hubs are normally mounted flush with the end of the shaft (122). If the coupling hub overhangs the shaft, blue and scribe shaft for relocating coupling hub during reassembly (Fig. 18).

2.

Remove coupling hub. Use a spanning type puller or puller holes provided in hub. Refer to coupling manufacturer’s instructions for assistance.

Remove and discard casing gasket (351). (Replace this with new gasket during reassembly.)

3700-8th IOM 12/04

REMOVAL OF SEAL CHAMBER COVER 1.

Loosen and remove gland stud nuts (355) (Fig. 19).

2.

Slide cartridge mechanical seal away from seal chamber cover (184).

3.

Install eyebolt in tapped hole provided in seal chamber cover (184).

4.

Rig lifting sling to eyebolt and to overhead lifting device. Take light strain on sling.

5.

Loosen and remove seal chamber cover/bearing frame bolts (370H).

6.

Separate seal chamber cover (184) from bearing frame (228) by tapping on cover flange with a hardwood block or a soft face hammer.

7.

Guide seal chamber cover (184) over end of shaft (122) once cover releases from bearing frame (228).

! s

CAUTION

Cartridge mechanical seal may be damaged if cover is allowed to come in contact with it. 8.

Remove and discard bearing frame/seal chamber cover gasket (540C). (Replace this with a new gasket during reassembly).

9.

Loosen set screws and remove cartridge mechanical seal from shaft (122).

10.

Remove and discard mechanical seal O-ring or gland gasket (360Q). (Replace this with a new O-ring or gasket during reassembly.)

Fig. 18

6

Fig. 19

3700-8th IOM 12/04

31

REMOVAL OF OPTIONAL WATER JACKET COVER 1.

Suspend seal chamber cover (184) from lifting sling, or firmly support seal chamber cover in a vertical position such that one water jacket connection is on the top and the other is on the bottom.

! s

WARNING

Seal chamber cover must be adequately supported so that it cannot fall. Personal injury and/or damage to equipment could occur. 2.

DISASSEMBLY OF STANDARD RING OIL OR OPTIONAL PURGE OIL MIST LUBRICATED POWER END This section covers disassembly of standard ring oil or optional purge oil mist lubricated power end. For power ends with optional features (pure oil mist lubrication, bearing cooling, etc.), refer to the appropriate section. 1.

Loosen radial (inboard) deflector set screw (222) (Fig. 20). SA and MA bearing frames do not use set screws to hold radial deflectors (123) in place. They are held in place on the shaft by an O-ring (497H). Replace O-ring during reassembly.

2.

Slide radial deflector (123) off shaft (122).

Introduce water slowly into the bottom connection until all air is vented and only water comes out of the top connection.

! s

WARNING

All air must be vented from water jacket. If all air is not vented, it can cause water jacket cover (490) to be propelled from its fit in the seal chamber cover (184). Personal injury and/or damage to equipment could occur. 3.

Stop introduction of water into water jacket.

4.

Seal top connection with plug or other suitable means.

5.

Slowly increase water pressure on inlet (bottom) connection. Water jacket cover (490) should be forced from its fit in the seal chamber cover (184). Be prepared to catch water jacket cover.

s !

Fig. 20

CAUTION

Do not exceed 7.0 kg/cm2 (100 psig) pressure in water jacket. 6.

Remove and discard outer and inner water jacket cover O-rings (412S and 497T, respectively) from grooves in water jacket cover (490). (Replace these with new O-rings during reassembly.)

Fig. 20A

32

3700-8th IOM 12/04

3.

Loosen thrust (outboard) deflector set screw (222) (Fig. 21). SA and MA bearing frames do not use set screws to hold thrust deflectors (123A) in place. They are held in place on the shaft by an O-ring (497F). Replace O-ring during reassembly (Fig. 21A).

4.

Slide thrust deflector (123A) off shaft (122).

5.

Loosen and remove thrust bearing end cover/bearing frame screws (370N).

6.

Pry thrust bearing end cover (109A) with O-ring (412, not shown) out of bearing frame (228). SA and MA thrust bearing end covers are sealed to the bearing frame with a gasket (360A).

7.

Remove and discard thrust bearing end cover shims (390C). Replace with new shims during reassembly. (Not applicable to pumps with SA and MA bearing frames.)

8.

Remove two (2) oil ring retainers (469P) from top of bearing frame (228).

9.

Remove two oil ring inspection plugs (113B) from top of bearing frame (228). SX, MX, LX, LA, and XLX pumps have two inspection plugs. SA and MA pumps have one inspection plug.

10.

Withdraw shaft/bearing assembly carefully from bearing frame (228). Take care not to damage oil rings (114) (Figs. 21 & 22). Should oil rings bind or hang up, they may be accessed through the inspection holes and repositioned using a hooked tool fashioned from wire. SX, MX, LX, LA, and XLX pumps have two (2) oil rings. SA and MA pumps have one (1) oil ring.

Fig. 21

Fig. 21A

s !

CAUTION

Do NOT remove bearings from shaft unless they are to be replaced. 11.

Bend locking tang of thrust bearing lockwasher (382) from notch in bearing locknut (136) (Fig. 22).

NOTE: Save bearings for inspection. 12.

Loosen and remove thrust bearing locknut (136) and lockwasher (382).

13.

Press or pull duplex thrust bearing (112) from shaft (122).

Fig. 21B

3700-8th IOM 12/04

33

6

Fig. 22

14.

Remove oil ring(s) (114) from shaft (122). SX, MX, LX, LA, and XLX pumps have two (2) oil rings. SA and MA pumps have one (1) oil ring.

15.

Press or pull radial bearing (168) from shaft (122).

17.

Remove radial bearing end cover (119A) with gasket (360) from bearing frame (228) by tapping out of fit in frame. On SA and MA pumps the end cover is sealed to the frame with an O-ring (497J).

NOTE: Save bearing for inspection. 16.

Loosen and remove radial bearing end cover / bearing frame screws (370P) (Fig. 23). Omit this step on SA and MA pumps. Radial bearing end cover (119A) is pressed in place and sealed with an O-ring (497J) (Fig. 23A).

Fig. 23A 18.

Fig. 23

34

Remove and discard radial bearing end cover gasket (360). (Replace this with a new gasket during reassembly.) On SA and MA pumps, discard radial bearing end cover O-ring (497J). Replace with new O-ring during assembly.

3700-8th IOM 12/04

DISASSEMBLY OF OPTIONAL PURE OIL MIST LUBRICATED POWER END Pure oil mist lubricated power ends are disassembled in the same manner as ring oil lubricated power ends. Oil rings (114) are not furnished with pure oil mist lubrication. Disregard any references to those parts.

DISASSEMBLY OF POWER END WITH OPTIONAL RADIAL HEAT FLINGER The radial heat flinger (123B) replaces the standard radial deflector (123) and is removed in the same manner (Fig. 24). Radial bearing end cover screws change from (370P) to (370W) (Not applicable to SA and MA pumps). Remainder of disassembly is the same as ring oil lubrication.

DISASSEMBLY OF POWER END WITH OPTIONAL AIR COOLING PACKAGE 1.

Loosen radial heat flinger set screw (222) (Fig. 24).

2.

Slide radial heat flinger (123B) off shaft (122).

3.

Loosen thrust deflector fan set screw (222).

4.

Slide thrust deflector fan (123E) off shaft (122).

5.

Loosen and remove thrust bearing end cover/bearing frame screws (370N).

6.

Remove thrust deflector fan guard support (234D).

Radial bearing end cover screws change from (370P) to (370W) (Not applicable to SA and MA pumps). Remainder of disassembly is the same as steps 6-18 of ring oil lubrication section.

DISASSEMBLY OF POWER END WITH OPTIONAL WATER COOLING PACKAGE The finned tube cooling assembly (494) should be removed from the bearing frame (228) prior to withdrawing the shaft/bearing assembly. The remainder of disassembly is the same as ring oil lubrication.

FINAL DISASSEMBLY Remove any remaining plugs and fittings.

6

Fig. 24

3700-8th IOM 12/04

35

INSPECTIONS Model 3700 8th Edition parts must be inspected to the following criteria before they are reassembled to ensure the pump will run properly. Any part not meeting the required criteria should be replaced.

IMPELLER (101) 1.

Inspect impeller vanes for damage. Replace if grooved deeper than 1.6 mm ( 116 in.) or if worn evenly more than 0.8 mm ( 132 in.). (Area “a” in Fig. 26.)

2.

Inspect shrouds for damage. Replace if worn or bent more than 0.8 mm ( 132 in.). (Area “b” in Fig. 26.)

CASING (100)

3.

The casing should be inspected for excessive wear, corrosion or pitting. Areas most susceptible are indicated by the arrows in Fig. 25. Casing should be repaired or replaced if it exceeds the following criteria:

Inspect leading and trailing edges of the vanes for pitting, and erosion or corrosion damage. Replace as in No. 1. (Area “c” in Fig. 26.)

4.

Clean and check impeller bore diameter.

1.

Localized wearing or grooving greater than 3.2 mm ( 18 in.) deep.

5.

Check impeller balance. It should be rebalanced if it exceeds the criteria of ISO 1940 G1.0.

2.

Pitting greater than 3.2 mm ( 18 in.) deep.

3.

Irregularities in case gasket seat surface which could hinder or prevent sealing.

NOTE: Clean parts to remove oil, grease or dirt. Protect machined surfaces against damage during cleaning.

Fig. 25

36

NOTE: Balancing impellers to ISO 1940 G1.0 requires extremely accurate tooling and equipment, and should not be attempted unless such tooling and equipment are available.

Fig. 26

3700-8th IOM 12/04

BALL BEARINGS (112, 168)

OIL RINGS (114)

1.

Ball bearings should be inspected for contamination and damage. The condition of the bearings will provide useful information on operating conditions in the bearing frame (228).

Oil rings must be as round as possible to function properly. Replace oil rings if they are worn, distorted and/or damaged beyond reasonable repair.

2.

Lubricant condition and residue should be noted.

SHAFT (122)

3.

Bearing damage should be investigated to determine cause. If cause is not normal wear, it should be corrected before pump is returned to service.

1.

Check bearing fits. If any are outside the tolerance shown in Tables 5 or 5A, replace the shaft (Fig. 27).

2.

Check shaft surface for damage, especially in areas indicated by arrows in Fig. 27. Replace if damaged beyond reasonable repair.

3.

Check shaft straightness. Use “V” blocks or balance rollers to support the shaft on bearing fit areas. Replace shaft if runout exceeds 0.03 mm (.001 in.)

NOTE: It is good practice to replace all ball bearings that have been removed from their shaft fits. Always replace if they are worn, loose or rough and noisy when rotated. Replacement bearings must be of proper size and type. 4.

Replacement bearings must be the same as, or equivalent to, those listed in Table 4.

Table 4 Model 3700 8th Edition Bearings Group

Radial (Inboard)

Thrust (Outboard)

SA MA SX MX, LA LX XLX

6210 C3 6211 C3 6212 C3 6213 C3 6215 C3 6218 C3

7310 BEGAM 7311 BEGAM 7312 BEGAM 7312 BEGAM 7313 BEGAM 7317 BEGAM

NOTE: Do NOT use shaft centers for runout check as they may have been damaged when removing bearings or impeller.

6

NOTE: Bearing numbers are based on SKF / MRC designations.

Fig. 27

3700-8th IOM 12/04

37

Model 3700

8th

Table 5 Edition Bearing Fits & Tolerances (SI Units)

According to ISO 286 (ANSI/ABMA Standard 7) Location

Description Shaft O.D. Interference

Radial (Inboard)

Bearing I.D. Frame I.D. Clearance Bearing O.D. Shaft O.D. Interference

Thrust (Outboard)

Bearing I.D. Frame I.D. Clearance Bearing O.D.

38

Group and Dimensions (mm) SA

SX

MA

MX, LA

LX

XLX

50.013 50.002 0.002 0.025 49.988 50.000 90.000 90.022 0.000 0.037 90.000 89.985 50.013 50.002 0.002 0.025 49.998 50.000 110.000 110.022 0.000 0.037 110.000 109.985

60.015 60.002 0.002 0.030 59.985 60.000 110.000 110.022 0.000 0.037 110.000 110.022 60.015 60.002 0.002 0.030 59.985 60.000 130.000 130.025 0.000 0.043 130.000 129.982

55.015 55.002 0.002 0.030 54.985 55.000 100.000 100.022 0.000 0.037 100.000 99.985 55.015 55.002 0.002 0.025 54.985 55.000 120.000 120.022 0.000 0.037 120.000 119.985

65.015 65.002 0.002 0.030 64.985 65.000 120.000 120.022 0.000 0.037 120.000 119.985 60.015 60.002 0.002 0.030 59.985 60.000 130.000 130.025 0.000 0.043 130.000 129.982

75.015 75.002 0.002 0.030 74.985 75.000 130.000 130.025 0.000 0.043 130.000 129.982 65.015 65.002 0.002 0.030 64.985 65.000 140.000 140.025 0.000 0.043 140.000 139.982

90.018 90.003 0.003 0.038 89.980 90.000 160.000 160.025 0.000 0.050 160.000 159.975 85.018 85.003 0.003 0.038 84.980 85.000 180.000 180.025 0.000 0.050 180.000 179.975

3700-8th IOM 12/04

Model 3700

8th

Table 5A Edition Bearing Fits & Tolerances (USA Units)

According to ISO 286 (ANSI/ABMA Standard 7) Location

Description Shaft O.D. Interference

Radial (Inboard)

Bearing I.D. Frame I.D. Clearance Bearing O.D. Shaft O.D. Interference

Thrust (Outboard)

Bearing I.D. Frame I.D. Clearance Bearing O.D.

Group and Dimensions (inches) SA

SX

MA

MX, LA

LX

XLX

1.9690 1.9686 0.0001 0.0010 1.9680 1.9685 3.5433 3.5442 0.0000 0.0015 3.5483 3.5427 1.9691 1.9686 0.0001 0.0010 1.9680 1.9685 4.3307 4.3315 0.0000 0.0015 4.3307 4.3301

2.3628 2.3623 0.0001 0.0012 2.3616 2.3622 4.3307 4.3316 0.0000 0.0015 4.3307 4.3301 2.3628 2.3623 0.0001 0.0012 2.3616 2.3622 5.1181 5.1191 0.0000 0.0017 5.1181 5.1174

2.1659 2.1654 0.0001 0.0012 2.1647 2.1653 3.9370 3.9378 0.0000 0.0015 3.9390 3.9363 2.1659 2.1654 0.0001 0.0012 2.1647 2.1653 4.7244 4.7253 0.0000 0.0015 4.7244 4.7238

2.5597 2.5592 0.0001 0.0012 2.5585 2.5591 4.7244 4.7253 0.0000 1.0015 4.7244 4.7238 2.3628 2.3623 0.0001 0.0012 2.3616 2.3622 5.1181 5.1191 0.0000 0.0017 5.1181 5.1174

2.9534 2.9529 0.0001 0.0012 2.9522 2.9528 5.1181 5.1191 0.0000 0.0017 5.1181 5.1174 2.5597 2.5592 0.0001 0.0012 2.5585 2.5591 5.5118 5.5128 0.0000 0.0017 5.5118 5.5111

3.5440 3.5434 0.0001 0.0015 3.5425 3.5433 6.2992 6.3002 0.0000 0.0020 6.2992 6.2982 3.3472 3.3466 0.0001 0.0015 3.3457 3.3465 7.0866 7.0876 0.0000 0.0020 7.0866 7.0856

6

WEAR RINGS (164, 202, 203, 230) All units are equipped with casing (164), impeller (202 and 203) and seal chamber cover wear rings (230). When clearances between the rings become excessive, hydraulic performance decreases substantially. 1.

Measure all wear ring diameters (Figs. 28, 29, 30).

2.

Calculate diametral wear ring clearances. Minimum diametral clearances should be as shown in Table 6.

3.

Replace wear rings when diametral clearance exceeds two times the minimum clearance as shown in Table 6 or when the hydraulic performance has decreased to unacceptable levels. Refer to Renewal of Wear Parts for replacement instructions for wear rings.

3700-8th IOM 12/04

Fig. 28

39

NOTE: For operating temperatures above 260° C (500° F) and for materials with greater galling tendencies (e.g. stainless steel), increase diametral clearance dimensions by 0.13 mm (.005 in.).

SEAL CHAMBER COVER (184)

Fig. 29

Seal chamber cover is available in two versions: one (optional) has a cooling chamber and water jacket cover (490) and the other (standard) does not. The (optional) cooled version is used when elevated pumpage temperatures are present. 1.

Ensure all gasekt/O-ring sealing surfaces are clean and have no damage that would hinder or prevent sealing (Fig. 31).

2.

Ensure all cooling (where applicable), flush and drain passages are clear.

3.

Inspect other surfaces for damage. Replace if worn, damaged or corroded more than 3.2 mm ( 18 in.) deep.

4.

Measure inside diameter of seal chamber cover bushing (125). If the diametral clearance between it and the impeller hub (101) exceeds 1.20 mm (.047 in.), one or both parts should be replaced. Refer to Renewal of Wear Parts for replacement instructions for seal chamber cover bushing.

Fig. 30

Table 6 Minimum Running Clearances Diameter of Impeller Wear Ring

Minimum Diametral Clearance

mm

in.

mm

in.