Caterpillar D11R CD Carrydozer Implement Systems Manual
April 3, 2017 | Author: Maquinarias Pesadas | Category: N/A
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Description
Service Training Meeting Guide 700
SESV1700 August 1998
TECHNICAL PRESENTATION
D11R CD CARRYDOZER IMPLEMENT SYSTEMS
D11R CD CARRYDOZER IMPLEMENT SYSTEMS MEETING GUIDE 700
SLIDES AND SCRIPT AUDIENCE
Level II--Service personnel who understand the principles of machine systems operation, diagnostic equipment, and procedures for testing and adjusting.
CONTENT This presentation describes the operation of the implement systems for the D11R CD Carrydozer. The functions and operation of the keypad are also covered.
OBJECTIVES After learning the information in in this presentation, the serviceman will be able to: 1. 2. 3. 4. 5.
locate and identify all major components in the implement systems; locate and identify all filters, drains, and test points; explain the operation of each component in the implement systems; trace the flow of oil through the implement hydraulic system; and use the keypad to select the operating parameters and system features.
REFERENCES D11R CD Track-type Tractor Service Manual (9XR 1-Up) D11R Track-type Tractor Service Manual (9TR 1-Up) D11R CD Track-type Tractor Operation and Maintenance Manual (9XR 1-Up)
SENR1790 SENR1775 SENR7022
PREREQUISITES Interactive Video Course "Fundamentals of Mobile Hydraulics" (CD ROM) STMG 546 "Graphic Fluid Power Symbols
TECD9001 SESV1546
SUPPLEMENTARY TRAINING MATERIAL STMG 692 "D11R Track-type Tractor--Implement Systems" STMG 527 "D11N Track-type Tractor--Part 2: Undercarriage, Implements, and Operator's Station" Video Tape "D11R Track-type Tractor/D11R CD Carrydozer--Introduction"
SESV1692 SESV1527 SEVN4173
Estimated Time: 2 Hours Visuals: 33 (2 X 2) Slides Serviceman Handouts: 8 Drawings/Charts Form: SESV1700 Date: 8/98 © 1998 Caterpillar Inc.
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TABLE OF CONTENTS INTRODUCTION ..................................................................................................................5 IMPLEMENT HYDRAULIC SYSTEM ................................................................................6 Bulldozer Tilt Circuit ......................................................................................................11 Dual Tilt Valve ................................................................................................................14 Bulldozer Lift Circuit......................................................................................................19 Fan Drive Hydraulic System...........................................................................................27 Ripper and Pilot Circuits.................................................................................................29 ELECTRO-HYDRAULIC PILOT SYSTEM .......................................................................32 KEYPAD OPERATION .......................................................................................................35 Hot Keys ........................................................................................................................37 Operator Setup Menu......................................................................................................39 Operation Parameters......................................................................................................47 CONCLUSION.....................................................................................................................58 SLIDE LIST..........................................................................................................................59 SERVICEMAN’S HANDOUTS ..........................................................................................60
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INSTRUCTOR NOTES
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D11R CD CARRYDOZER IMPLEMENT SYSTEMS
© 1998 Caterpillar Inc.
1
INTRODUCTION This presentation discusses the major design features of the implement systems for the D11R CD Carrydozer (Serial Number 9XR 1-Up). The D11R CD is an elevated sprocket design tractor equipped with the Power Train Electronic Control System, Finger Tip Control steering, Electronic Implement Control, and Vital Information Display System (VIDS). • 3508B engine
This tractor is powered by the 3508B turbocharged and aftercooled engine rated at 634 kW (850 hp) with a 25 percent net torque rise for excellent lugging performance. The power from the engine is transferred through a torque divider that results in maximum torque multiplication during heavy loading.
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IMPLEMENT HYDRAULIC SYSTEM COMPONENTS DUAL TILT CONTROL VALVE AND DUMP VALVE
ELECTRO-HYDRAULIC PILOT VALVE GROUP RIPPER CONTROL VALVE
FAN MOTOR AND MAKEUP VALVE ECM
OIL COOLER AND BYPASS VALVE HYDRAULIC TANK
FAN PUMPS
IMPLEMENT PUMP
2 IMPLEMENT HYDRAULIC SYSTEM • Continuous flow at minimum pressure with controls in HOLD • Two section gear-type pump • Pilot operated control valves
The implement hydraulic system for the D11R CD is a continuous flow design that permits minimum pressure in the system when the implement control valves are not activated. The pump for operation of the bulldozer and ripper is a two section gear-type pump (large and small sections). The oil cooling for the hydraulic circuits is provided by the fan circuit. The system components include: the implement pump, electro-hydraulic pilot valve group, logic valve, demand control fan pumps, dozer control valve, dual tilt control valve, quick dump valve, and a ripper control valve. The system components control the flow of hydraulic oil to the appropriate implement cylinders.
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3
• Hydraulic tank components: - Oil fill tube - Manual air vent - Hydraulic oil filters - Sight gauge - Tank drain - Fan return filter (not shown)
The hydraulic tank is located on the right fender just outside the operator's compartment. The oil fill tube and cap are located on the top of the tank. Inside the fill tube is a fine mesh screen which removes large particles of dirt or foreign material from the oil as the tank is filled. A manual air vent and the breaker relief valve (not visible) are located near the filters. The vacuum breaker relief valve has a pressure setting of 3.5 kPa (.5 psi) and a pressure relief setting of 210 kPa (30 psi). Two hydraulic oil filters are located inside the tank. Also mounted at the front of the tank is a fan return filter, and below the right fender is a pilot supply filter. The oil level sight gauge on the front of the tank permits an easy check of the hydraulic system oil level. Always clean the sight gauge to be sure the oil level is visible. Dirt and stains on the glass frequently give the appearance of a full tank. A scheduled oil sampling (S•O•S) tap and tank drain are located on the front of the tank. NOTE: The capacity of the D11R CD hydraulic system is approximately 314 Liters (83 gal.). The hydraulic tank shown in this view is from the D11R 9TR Track-type Tractor.
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4 6
2
3 1
5
7 8
4
1. Dozer control lever
The implement control levers for the D11R CD are not mechanically connected to the dozer control valve. The dozer control lever and the ripper control lever are input devices to an Electronic Control Module (ECM) located below the implement control levers.
2. Blade DUMP or RACK BACK lever
Moving the dozer control lever (1) forward or rearward LOWERS or RAISES the blade. Moving the lever left or right allows the blade to TILT LEFT or TILT RIGHT. The thumb lever (2) allows the operator to DUMP or TILT (RACK) BACK the blade.
• Component identification:
3. Blade Auto Mode select button
The left button (3) on the dozer control lever allows the operator to activate the Automatic Modes. After the blade is loaded or the dig cycle is complete, the first push of the left button allows the blade to TILT (RACK) BACK to an operator pre-set carry position through the Vital Information Display System (VIDS) keypad. The second push of the left button begins the SPREADING portion of the cycle. The blade will raise and pitch forward (or DUMP) automatically until the full stroke of the tilt cylinders and the lift cylinders is reached.
4. Blade Manual Mode select button
The Dump Mode will be cancelled if the operator attempts to TILT (RACK) BACK the blade or presses the right mode select button (4). The right button (4) cancels the Automatic Mode, and the blade may be controlled manually. Located on the front of the dozer control lever is a trigger switch (not shown). When this switch is engaged, the blade will pitch forward to DUMP the blade load.
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STMG 700 8/98 5. Ripper RAISE or LOWER switch 6. SHANK IN or OUT switch 7. Ripper park button
8. Implement controls ON or OFF switch
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The ripper controls are located to the rear of the dozer control lever. Ripper RAISE and LOWER are controlled by the thumb switch (5) at the front of the ripper controls. The finger switch (6) allows the operator to control SHANK IN and SHANK OUT. Pushing the button (7) on the ripper control raises the ripper to maximum height or will move the ripper tip to the full SHANK IN position if configured through Caterpillar Electronic Technician (ET). Located to the rear of the ripper controls is a deactivating switch (8) that turns the power ON or OFF to the implement controls.
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5
• Dozer control valve
The dozer control valve is located below the operator's station on the right side of the machine. Inside the control valve are two spools. One spool controls blade lift and lower, and one spool controls blade tilt. The blade lift spool and the blade tilt spool are operated by pilot oil.
• Pilot operated dozer lift spool
The pilot operated dozer lift spool has four positions: RAISE, HOLD, LOWER, and FLOAT. The pilot operated blade tilt spool has three positions: TILT RIGHT, HOLD, and TILT LEFT.
• Pilot operated blade tilt spool
The tilt circuit receives oil from the small (tilt) section of the pump. When the circuit is not in use, the oil joins the large pump section oil flow to the lift circuit. If neither circuit is in use, the dump valve opens and sends oil flow to the tank. Both the tilt and lift circuits have load check valves and relief valves. The lift circuit has makeup valves for both the rod and head ends of the lift cylinders.
• Dozer control valve similar to 9TR
NOTE: The dozer control valve in the D11R CD is very similar to the dozer control valve in the D11R 9TR Tractor. The only major difference is the pilot operated lift spool.
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LOAD CHECK VALVE
DOZER TILT SPOOL HOLD SECTION A-A
A
A
TILT RIGHT
TILT LEFT FROM SMALL PUMP FROM PILOT VALVE FROM LARGE PUMP
6 Bulldozer Tilt Circuit • Tilt spool in HOLD
The tilt spool has three positions: TILT RIGHT, HOLD, and TILT LEFT. The tilt spool is hydraulically operated by pilot pressure from a pilot valve group which is controlled by the ECM. In the HOLD position, the oil from the small pump goes around the tilt spool and joins the oil from the large pump. The oil then opens the dump valve and returns to the tank.
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LOAD CHECK VALVE
DOZER TILT SPOOL TILT RIGHT SECTION A-A
TILT RIGHT A
TILT LEFT
A FROM SMALL PUMP
FROM LARGE PUMP
FROM ELECTRO-HYDRAULIC PILOT VALVE MANIFOLD
7 • Pilot oil moves tilt spool to right
Movement of the dozer control lever to the right sends an electrical signal to the ECM. The ECM then sends an output signal to a proportional solenoid on the electro-hydraulic pilot valve manifold. As the solenoid opens, pilot oil flows to the left end of the tilt spool. The pilot oil pressure moves the spool to the TILT RIGHT position.
• Pressure opens load check valve
In the TILT RIGHT position, the oil from the small (tilt) section of the pump cannot combine with the oil from the large section, and the pressure of the oil increases. The increased pressure opens the load check valve. Before the start of flow to the left cylinder, oil passes through a small hole in the tilt relief valve and fills the large spring chamber between the relief spool and the poppet. This condition raises the pressure setting of the tilt relief valve. As the tilt spool moves farther, the pump flow is sent to the left tilt cylinder, and the supply pressure increases due to the load.
• Oil goes to tilt cylinder to retract rod
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The CD machine is only equipped with dual tilt. In the TILT RIGHT position pump oil is sent to the head end of the left tilt cylinder, which pushes oil to the rod end of the right tilt cylinder. Lever movement to the left sends pilot pressure oil to the right end of the spool. The spool moves to the left, sending small pump oil to the right tilt cylinder, and the blade tilts left. When the blade control lever is released from either the TILT RIGHT or TILT LEFT position, springs return the tilt spool to the HOLD position. When the dozer control lever is released, the pilot oil at the left end of the tilt spool is drained. The spring at the right end of the tilt spool moves the spool to the HOLD position. In the HOLD position, the oil in the head and rod ends of the tilt cylinders is blocked. The tilt angle of the blade will not change until the dozer control lever is moved. To summarize, with the tilt spool in the TILT RIGHT position, flow from the small section of the pump does not combine with flow from the large section. Pilot oil at the left end of the tilt spool moves the spool to the right. Flow from the small section of the pump goes around the tilt spool and is sent to the head end of the left tilt cylinder. • Tilt circuit relief valve
Because the small (tilt) section flow cannot combine with the oil in the center chamber, the dump valve for the dozer lift circuit does not control the tilt circuit pressure. Instead, the tilt relief valve (at the top of the valve body) is used to limit the pressure in the tilt circuit. When the tilt cylinder pressure increases to 24825 kPa (3600 psi), the pilot valve for tilt relief will open and drain the spring chamber behind the valve spool. This condition permits the valve spool to open and limit the pressure in the tilt circuit.
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DUAL TILT SOLENOID VALVE HOLD TO ROD END
FROM ELECTRO-HYDRAULIC PILOT MANIFOLD S1
TO HEAD END
TILT CYLINDERS
FROM BLADE TILT VALVE
8 Dual Tilt Valve • Dual tilt valve has two modes: - TILT LEFT or RIGHT - DUMP or RACK BACK
• Solenoid valve has two positions
• Thumb switch activates S1 coil • Trigger switch activates S1 coil
The dual tilt solenoid valve provides the blade tilt circuit with two different modes of operation: DUAL TILT (LEFT or RIGHT) and DUMP or TILT (RACK) BACK. The control valve is located between the radiator grill doors and the radiator on the left side of the machine. The valve is activated by pilot oil pressure supplied by the fan circuit. The dual tilt valve contains a spring centered, hydraulically actuated spool valve and an electrically actuated solenoid control valve. The solenoid valve contains two coils and has two different positions. Only one coil (S1) is used in this application. When the solenoid is not activated, the system operates in the DUAL TILT Mode. When the thumb switch on the dozer control lever is moved left, the S1 coil in the solenoid valve is energized and the system operates in the TILT (RACK) BACK Mode. When the trigger switch on the dozer control lever is depressed, or the thumb switch is moved to the right, the system also energizes the S1 coil in the solenoid and activates the DUMP Mode.
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STMG 700 8/98 • Tilt cylinders contain bypass valves
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Both the left and right tilt cylinders pistons contain bypass valves. These valves allow the completion of the tilt operation. When one of the cylinders reaches the end of its travel, the oil goes through the bypass valve to continue filling the other cylinder.
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DUAL TILT CIRCUIT TILT RIGHT FROM TILT CONTROL VALVE
TO ROD END LEFT TILT CYLINDER RIGHT TILT CYLINDER
TO TILT CONTROL VALVE
TO HEAD END
FROM FAN CIRCUIT
FROM TRIGGER SWITCH
9 • Dual tilt operation
DUAL TILT is standard on the D11R CD. In the DUAL TILT Mode, oil flow is blocked at the solenoid valve and the dual tilt directional spool remains centered by the spring force. Movement of the tilt cylinders in opposite directions causes the blade to tilt.
• TILT RIGHT
When the operator moves the dozer control lever to the TILT RIGHT position, supply oil from the dozer control valve tilt circuit is sent to the head end of the left tilt cylinder. This condition causes oil from the rod end of the left tilt cylinder to be forced back to the dual tilt control valve. The oil travels around the spool and is directed to the rod end of the right tilt cylinder. As the right tilt cylinder retracts, the oil in the head end of the cylinder is directed back through the dual tilt control valve and the dozer tilt control valve to the tank.
• Cylinders move in opposite directions
This action of the tilt cylinders causes the blade to tilt to the right. When the control lever is released, the oil is blocked at the control valve, and the blade remains tilted to the right until the control lever is moved again.
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• Bypass valve provides full retraction for maximum blade tilt
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The bypass valve in the left tilt cylinder piston allows oil to continue flowing to the right cylinder after the rod is fully extended from the left cylinder. The bypass valve allows oil to continue to flow to the right tilt cylinder rod end and provides full retraction for maximum blade tilt.
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DUAL TILT CIRCUIT BLADE DUMP FROM TILT CONTROL VALVE
TO ROD END LEFT TILT CYLINDER RIGHT TILT CYLINDER
TO TILT CONTROL VALVE
TO HEAD END
FROM FAN CIRCUIT
FROM TRIGGER SWITCH
FROM QUICKDUMP VALVE
10 • Trigger switch energizes S1 coil
• BLADE DUMP
To pitch (or dump) the blade forward, the trigger switch on the dozer control lever is depressed and the S1 coil in the solenoid valve is energized. The valve directs pilot oil from the solenoid valve to the lower end of the directional spool and opens the upper end of the spool to drain. The valve spool then shifts up against the spring force to the BLADE DUMP mode. For BLADE DUMP, flow from the dozer tilt circuit is sent to the head end of the left tilt cylinder. As the cylinder extends, oil from the rod end is pushed back to the dual tilt valve and is directed to the head end of the right tilt cylinder. The oil in the rod end of the right tilt cylinder is pushed back through the dual tilt valve to the hydraulic tank. As both tilt cylinders extend, the blade dumps forward.
• Quick-dump valve
When the trigger switch is depressed for blade DUMP, the quick-dump valve located below the dual tilt valve is also activated. The quick-dump valve offers regenerative flow to prevent cylinder voiding.
• Thumb lever left allows RACK BACK
When the trigger switch is released, the oil is blocked at the control valve and the blade remains pitched forward until the thumb lever is moved to the left or TILT (RACK) BACK Mode.
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DOZER LIFT SPOOL HOLD LIFT RELIEF VALVE FROM LARGE PUMP LIFT SPOOL
FROM RIPPER VALVE SIGNAL PORT
TO ENGINE RETARDER SOLENOID
11 Bulldozer Lift Circuit • Lift spool in HOLD
The lift spool has four positions: RAISE, HOLD, LOWER, and FLOAT. The lift spool is hydraulically operated by pilot oil from the electrohydraulic pilot valve manifold. Movement of the dozer control lever to the rear sends an electrical signal to the ECM. The ECM sends an output signal to a solenoid on the electro-hydraulic pilot valve manifold. The solenoid valve opens and sends pilot oil to the left end of the lift spool. The spool shifts to the right and directs oil from the large pump to the rod end of the lift cylinders, causing the blade to RAISE. Forward movement of the dozer control lever sends pressure oil to the head end of the lift cylinders, causing the blade to LOWER.
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STMG 700 8/98 • FLOAT operation
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To operate the dozer in FLOAT, the operator must "arm" the dozer control lever by pressing the float button on the Vital Information Display System (VIDS) keypad. When the button is pressed, a light located below the keypad illuminates, indicating the FLOAT Mode is armed. The lever must be moved to the maximum forward position and then released. The lever will return to the neutral position, but the blade will be operating in the FLOAT Mode. If no active faults are present, the message center will display "FLOAT" when the FLOAT Mode is active. Moving the control lever, pressing the float Hot Key on the keypad, or pressing the Manual Mode selector button on the control lever will deactivate the FLOAT Mode.
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DOZER CONTROL VALVE SECTION A-A
TILT RELIEF VALVE
TO ROD END TILT CYLINDER
TILT SPOOL
HOLD
TO HEAD END TILT CYLINDER FROM SMALL PUMP FROM PILOT VALVE FROM LARGE PUMP
LIFT RELIEF VALVE
FROM PILOT MANIFOLD
FROM PILOT MANIFOLD
SHUTTLE VALVE
FROM RIPPER VALVE SIGNAL PORT
TO ENGINE RETARDER SOLENOID
12 • HOLD position
When the valve spools in both the dozer control valve and the ripper control valve are in the HOLD position, the pressure of the supply oil (from both the small and large sections of the pump) through the dozer control valve is maintained at approximately 700 kPa (100 psi). The dozer lift spool is a "closed-center" spool, and the blade tilt spool is an "open-center" spool. In this view, both spools are in the HOLD (or center) position. Oil from the large pump section enters the valve and fills the chamber in the center of the valve body. Flow from the small section of the pump enters the valve body, flows around the open-center tilt spool, and joins with the oil from the large section in the center chamber. All the oil around the closed-center lift spool is blocked. Because both spools are in the HOLD position, no oil flows to or from the lift and tilt cylinders, and the load check valves do not open. .
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• Dump valve
The spring for the dump valve plus the pressure of the oil in the tank have a combined force that provides a restriction to flow. When the pressure in the center chamber increases above the spring force plus the tank oil pressure, the dump valve will open and permit the combined flow from the two sections of the pump to return to the tank. With both spools in the HOLD position, the dump valve provides a constant low system pressure which is available for instant implement response or for "feathering" action of the controls when activated by the operator.
• Shuttle valve
The shuttle valve resolves which hydraulic function (dozer raise and lower or ripper) will provide pressure feedback to the spring chamber of the dump valve. The shuttle valve is spring biased to the dozer lift and lower function. The stem shifts to the right when oil pressure is directed to the ripper valve port of the dozer control valve when the ripper function is requested by the operator or during an engine overspeed condition. When the lift spool is in the HOLD or center position, the spring chamber of the dump valve is connected to the tank. Tank pressure is transmitted through passages in the lift and lower spool that travel through the ball resolver valve and the shuttle valve before filling the spring chamber of the dump valve. During blade lift and lower functions, the cylinder load pressure signal is transmitted to the ball resolver valve, through the shuttle valve, to the spring chamber of the dump valve. This path is the same as when the spool is in the HOLD position. The cylinder load pressure signal is from the lift cylinder rod end during lift and from the cylinder head end during lower or float. The ball resolver valve directs the higher of either the cylinder rod or head end pressure to the shuttle valve. When the shuttle valve spool is moved completely to the left, pressure oil from the center chamber cannot fill the spring chamber of the dump valve. For this reason, only the dump valve springs plus the tank oil pressure are regulating the pressure in the center chamber. This pressure will remain low as long as the lift and tilt spools are in the HOLD position, and the ripper circuits are not activated.
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DOZER CONTROL VALVE RAISE TO HEAD END TILT CYLINDER
TO ROD END TILT CYLINDER
FROM SMALL PUMP
FROM LARGE PUMP ROD END LIFT CYLINDER HEAD END LIFT CYLINDER
FROM PILOT MANIFOLD
FROM RIPPER VALVE SIGNAL PORT
TO ENGINE RETARDER SOLENOID
13 • Dozer RAISE
This view of the dozer control valve shows spool movement and oil flow when the control lever is moved to the RAISE position. Movement of the dozer lift spool to the RAISE position opens the chamber at the left center of the spool, which is connected to the rod end of the lift cylinders. Since the oil around the lift spool is no longer blocked, pressure oil from the center chamber of the valve body can open the load check valve and flow around the lift spool to the rod end of the lift cylinders. At the same time that pressure oil is sent to the lift cylinders, oil also flows to the ball resolver valve. The ball resolver valve operates similarly to a check valve. With the lift spool in the RAISE position, the ball resolver valve permits pressure oil to flow to the shuttle valve, but blocks flow to the head end and tank at the right end of the ball resolver valve.
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• Dump valve converted to pilot operated relief valve
During blade RAISE, the lift cylinder rod end pressure is transmitted to the spring chamber of the dump valve through the ball resolver and the shuttle valve. The dump valve uses the rod end cylinder pressure combined with the spring to move the dump valve to the right until the supply pressure is 700 kPa (100 psi) above the cylinder pressure. If the pressure in the dump valve spring chamber reaches 24135 kPa (3500 psi) due to cylinder load or an end stroke condition, the relief valve will open and allow the spring chamber oil to drain to the tank. When oil is allowed to drain from the dump valve spring chamber, the dump valve moves to the left and allows pump flow to pass around the dump valve to the tank. This operation prevents the system pressure from exceeding 24135 kPa (3500 psi) during blade RAISE or LOWER.
• Blade "feathering"
An additional condition can exist during dozer operation which is referred to as "feathering the blade." If the operator moves the control lever a small distance to gradually raise the blade, flow to the cylinders goes through the throttling slots in the lift spool. Flow through the throttling slots can create the same effect as an orifice by restricting the flow of oil to the lift cylinder. This restriction to flow causes a pressure difference between the oil in the center chamber of the valve body (system pressure) and the oil transmitted to the spring chamber of the dump valve (cylinder pressure). If the pressure difference is greater than the spring force, the dump valve will open and permit some of the pump flow to return to the tank at the same time that oil flows to the lift cylinders.
• Load check valve prevents drift
The load check valve is used to prevent reverse oil flow from the cylinders which can cause "cylinder drift."
• FLOAT position
When the lift spool is in the FLOAT position, the load check valve is open. The supply oil in the center chamber goes through the open load check valve to the head end of the lift cylinders. The center chamber is also open to the tank. The weight of the blade is the force that moves the dozer down. The oil from the rod end of the lift cylinders is also open to the tank when the lift spool is in the FLOAT position. When an outside force moves the blade up, the pressure of the oil in the rod end of the lift cylinders decreases as the rods retract. The pressure of the oil in the rod end circuit is less than the pressure in the head end circuit. The higher pressure in the head end circuit opens a makeup valve to fill the rod end circuit as needed.
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DOZER LIFT SPOOL HOLD LIFT RELIEF VALVE FROM LARGE PUMP LIFT SPOOL
FROM RIPPER VALVE SIGNAL PORT
TO ENGINE RETARDER SOLENOID
14 • Dump valve has four functions: 1. Release pump flow with levers in HOLD 2. Pressure compensation valve for pump
The dump valve in the dozer control valve has four different functions in the dozer lift and ripper circuits. When the blade lift and ripper control spools are in the HOLD position, the pressure in the spring chamber of the dump valve is the same as tank pressure plus 700 kPa (100 psi), which is the value of the spring. During blade RAISE or LOWER, the pressure in the spring chamber of the dump valve is the same as the pressure in either the head end or rod end of the lift cylinders. This pressure is felt through the ball resolver valve and the shuttle valve. With the cylinder pressure plus the spring force behind the dump valve, the supply pressure will be raised to a level of 700 kPa (100 psi) above the cylinder pressure. Flow control and fine modulation are possible because of the constant 700 kPa (100 psi) pressure behind the dump valve.
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3. Flow control
When the ripper control spools are activated, pilot oil (from the ripper solenoid valve controlled by the implement ECM) is sent to the left end of the shuttle valve and moves the shuttle valve to the right. When the shuttle valve is moved, supply oil fills the spring chamber behind the dump valve. The relief valve and the dump valve now function as the pressure limiter for the ripper circuit. Because oil from the small pump section goes to both a passage in the dozer control valve and to the ripper control valve, the pressure of the oil is always the same in both places.
4. Relief valve for main system operation
When the lift spool is in the RAISE or LOWER position, cylinder pressure is transmitted to the spring chamber of the dump valve through the ball resolver valve and the shuttle valve. A pressure relief valve is located within the dump valve spring chamber. This valve will lift off its seat and allow the spring chamber oil to drain when the pressure in the spring chamber reaches 24135 kPa (3500 psi). When the relief valve opens, an imbalance exists between the pressure in the center chamber and a combination of the dump valve spring and the pressure in the spring chamber. A balance is achieved when the dump valve shifts to the left allowing oil in the center chamber to drain until the pressure in the center chamber is equal to the dump valve spring plus the spring chamber pressure. This method of controlling maximum system pressure is called a pilot operated relief valve.
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FAN DRIVE HYDRAULIC SYSTEM FAN PUMP CASE FLUSHING FLOW
RADIATOR
TO ELECTRO-HYDRAULIC PILOT MANIFOLD
FAN DRIVE MOTOR
SOLENOID PILOT SUPPLY FILTER
OIL COOLER FAN PUMPS
TANK OIL COOLER BYPASS VALVE
SUCTION LINE
CASE DRAIN LINE
FAN RETURN FILTER
15 Fan Drive Hydraulic System • Fan pumps part of hydraulic system
• Demand control fan system equipped with tandem axial pumps
The demand control fan system on the D11R CD is considered part of the implement hydraulic system because the fan pumps pull oil from the implement hydraulic tank and send some of the oil to the electro-hydraulic pilot valve manifold group. Pilot oil hydraulically shifts the blade lift and tilt spools in the dozer control valve and also shifts the spools in the ripper control valve to control ripper lift and ripper tip.
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16
• Fan pumps
The tractor is equipped with two hydraulic pumps for the demand control fan system. The tandem axial pumps are located below the floor plate on the right rear of the engine and are driven off the flywheel. The front pump is a variable displacement pump and the rear pump is a fixed displacement pump. The system adjusts the fan speed to match the cooling system demands based on an input signal to the engine Electronic Control Module (ECM) from the engine coolant temperature sensor.
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17
Ripper and Pilot Circuits • Ripper control valve
The ripper control valve has two spools (lift and tip), two makeup valves (one for the head end of the ripper lift cylinders and one for the head end of the ripper tip cylinders), and a load check valve. The ripper lift spool is operated with pilot oil pressure and has three positions: RAISE, HOLD, and LOWER. The ripper tip spool is operated by pilot oil pressure and also has three positions: SHANK IN, HOLD, and SHANK OUT. The valve spools have no detent positions. Movement of the thumb lever on the ripper control lever causes the ripper to RAISE or LOWER. Moving the finger lever on the ripper control lever controls SHANK IN or SHANK OUT. The button on the ripper control lever activates the automatic raise and park feature.
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RIPPER TIP IN LOWER
TILT BLADE RIGHT/ RAISE ON/OFF DUMP SOLENOID VALVE
RIPPER AND PILOT SYSTEMS RAISE
FAN PUMPS
IMPLEMENT PUMP
TIP RIPPER TILT OUT RAISE LEFT/ RACK
BLADE LOWER/ FLOAT
TO DOZER CONTROL VALVE
MAKEUP VALVE LOAD CHECK VALVE
LIFT CYLINTERS
RIPPER TIP SPOOL RIPPER LIFT SPOOL
18 • RIPPER RAISE
When the operator requests the RIPPER RAISE function, an electrical signal from the ripper thumb switch is sent to the ECM. The ECM sends an output signal to the ripper raise solenoid on the pilot manifold. The solenoid valve opens, sending pilot oil to the upper end of the ripper lift spool. At the same time, the ECM sends a signal to the ON/OFF solenoid valve. The ON/OFF solenoid energizes, allowing pilot oil to flow to the shuttle valve in the dozer control valve. The shuttle valve shifts to the right and allows oil from the center chamber to flow to the spring chamber of the dump valve, which now functions as the relief valve for the ripper circuit. When the shuttle valve is shifted, the oil from the implement pump is directed to the load check valve in the ripper control valve. The increased pressure opens the load check valve and allows oil to flow to the rod end of the ripper lift cylinders to RAISE the ripper. NOTE: When calibrating the ripper solenoids, it is necessary to use Caterpillar Electronic Technician (ET) Version 2.3 or newer.
STMG 700 8/98
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RIPPER TIP IN LOWER
TILT BLADE RIGHT/ RAISE ON/OFF DUMP SOLENOID VALVE
RIPPER AND PILOT SYSTEMS LOWER
FAN PUMPS
IMPLEMENT PUMP TIP RIPPER TILT OUT RAISE LEFT/ RACK
BLADE LOWER/ FLOAT TO DOZER CONTROL VALVE
MAKEUP VALVE
LIFT CYLINDERS
LOAD CHECK VALVE
RIPPER TIP SPOOL RIPPER LIFT SPOOL
19 • RIPPER LOWER
When the operator requests a RIPPER LOWER function, an electrical signal from the ripper thumb switch is sent to the ECM. The ECM sends an output signal to the ripper lower solenoid on the pilot manifold. The solenoid valve opens, sending pilot oil to the lower end of the ripper lift spool. At the same time, the ECM sends a signal to the ON/OFF solenoid valve. The ON/OFF solenoid energizes, allowing pilot oil to flow to the shuttle valve in the dozer control valve. The shuttle valve shifts to the right and allows oil to flow to the spring chamber of the dump valve, which now functions as the relief valve for the ripper circuit. When the shuttle valve is shifted, the oil from the implement pump is directed to the load check valve in the ripper control valve. The increased pressure opens the load check valve and allows oil to flow to the head end of the ripper lift cylinders to LOWER the ripper. If the ripper drops faster than the pump can makeup due to the ripper weight, the makeup valve opens and allows drain oil to go to the head end of the cylinders to prevent cylinder voiding.
STMG 700 8/98
- 32 -
ELECTRO-HYDRAULIC PILOT SYSTEM HOLD
TIP IN
TO DOZER TILT SPOOL TO DOZER LIFT SPOOL
TILT RIPPER RIGHT/ LOWER DUMP
BLADE RAISE
ON/OFF SOLENOID VALVE TEST PORT
TO FAN MOTOR
TO RIPPER TIP SPOOL FAN PUMPS
TO RIPPER LIFT SPOOL
TO DOZER TILT SPOOL TO RIPPER TIP SPOOL
SHUTTLE VALVE PRESSURE REDUCING VALVES TIP OUT
RIPPER RAISE
TILT LEFT/ RACK BLADE LOWER/FLOAT
FROM LIFT CYLINDER TO DOZER LIFT SPOOL TO DOZER TILT SPOOL
20 ELECTRO-HYDRAULIC PILOT SYSTEM • Blade functions
The implement system for the D11R CD is operated by pilot oil. This oil comes from the fan pump to a manifold that is located below the floor plate on top of the main case. This manifold includes an ON/OFF solenoid that allows the implement control levers to function or blocks the flow to the electro-hydraulic "main gallery." The manifold also contains four proportional solenoids that control the amount of pilot oil that is directed to the dozer control valve. This pilot oil is sent to the ends of the tilt or lift spool and control BLADE LIFT, BLADE LOWER/FLOAT, BLADE TILT LEFT, and BLADE TILT RIGHT. The ECM receives a signal from the dozer control lever when the operator requests a blade function. The ECM sends an output signal to the appropriate solenoid. The solenoid opens proportionally to the signal received from the ECM. The higher the signal, the more the solenoid opens to allow more flow to the spool. When the automatic feature is activated by the operator, the ECM also sends output signals to all the appropriate solenoids simultaneously, allowing the automatic blade functions.
➥
STMG 700 8/98 • Ripper functions
- 33 -
If the tractor is equipped with a ripper, the pilot manifold will consist of two additional bolt-on blocks. These blocks contain four more proportional solenoids that direct pilot oil to the ripper control valve to select RIPPER RAISE, RIPPER LOWER, SHANK IN, and SHANK OUT. When the operator requests a ripper function, the corresponding ripper switch sends a signal to the ECM. The ECM sends an output signal to the appropriate solenoid on the pilot manifold which directs pilot oil to the appropriate spool end. The ripper control also contains an automatic park button. When this button is pushed by the operator, the ECM sends a signal that RAISES the ripper to the maximum height and moves the shank to the full SHANK IN position if configured through Caterpillar Electronic Technician (ET). NOTE: The charts in Serviceman's Handouts No. 1, 2, and 3 show which solenoids are activated by the ECM when the operator requests an implement movement.
STMG 700 8/98
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21
• Implement lockout switch (arrow)
If the implement lockout switch (arrow) is switched to the locked position, the VIDS display will read IMPLMTS_OFF. When the operator switches the implement lockout switch back to the unlocked position, the mode will be set to MANUAL.
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7
1
8
2 3 4
5
6 10
9
22
KEYPAD OPERATION • Key functions • Left side of keypad: 1. Key pressed indicator 2. OK key 3. MENU key 4. CANCEL key 5. HELP key 6. MORE key 7. Backward key 8. Forward key
The keypad, located to the right of the operator’s compartment above the dozer control lever, allows the operator or service technician to communicate with the VIDS monitor module. The operator or service technician can select what information to show on the display and also initiate service procedures. The keypad also allows the operator to enter an identification number to recall stored parameters and to acknowledge events. The key pressed indicator (1), located above the OK key (2), flashes once each time a key is pressed. This flash notifies the operator or the service technician that the keystroke was accepted. The keypad will not accept an input when an active event is present and flashing on the message center. To proceed, the operator or service technician must acknowledge the event by pressing the OK key. When a series of related keystrokes (operator ID or menu operations) is entered, consecutive keystrokes must be less than five seconds apart. Periods longer than five seconds will cancel the previous keystroke.
9. GAUGE key 10. SETUP key
➥
STMG 700 8/98
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The left side of the keypad allows the operator or service technician to communicate with the VIDS monitor while the right side of the keypad allows the operator to "arm" or "disarm" the Autopitch feature of the machine. Autopitch is a function of the Electronic Implement Control and allows the operator to change parameters of the automatic dozing cycle. This function will be covered later in the presentation. The functions of the left keys are: Key Pressed Indicator (1): flashes once when any key is pressed. OK (2): used to complete keypad entries and to acknowledge events. MENU (3): used to access the main menu. The menu is comprised of the following choices: 1:PREFERENCE MENU 1:ADJUST CONTRAST 2:ADJUST BACKLIGHT 3:SELECT UNITS 4:SELECT LANGUAGE 2:EVENTS MENU 1:SHOW ACK EVENTS 2:SHOW LOGGED EVENTS 3:SYSTEM MENU 1:SHOW MACHINE STATS 2:TEST DISPLAY CANCEL (4): used to reject a prompt choice or setting value. HELP (5): not supported at this time. MORE (6): displays next line of text on message center. Backward Arrow Key (7) Forward Arrow Key (8) GAUGE (9): shows parameter name and number for first gauge in available list. Line two shows parameter value and unit of measure. The Forward Arrow Key (8) allows the operator to scroll one gauge at a time through the list. If the GAUGE key is pressed twice, the parameters will be shown by categories (Engine, Transmission, Electronic Implement, etc.). SETUP (10): enables the operator to select and save a grouping of machine settings to better meet an operator's method of operation. This mode will be discussed in detail later in the presentation.
STMG 700 8/98
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VITAL INFORMATION DISPLAY SYSTEM (VIDS) OPERATOR KEYPAD
1
2
3
4
5
6
OK
MENU
GAUGE
X
?
CANCEL
HELP
SETUP
SET PITCH
SET HT
SET MACH
0
7
9
MORE
AUT PITCH
FLOAT
23 Hot Keys • SETUP key (arrow)
The Carrydozer keypad provides "Hot Keys" in addition to the standard VIDS keypad. These Hot Keys are used to access functions specific to the Carrydozer Electronic Implement Control. The SETUP Hot Key (arrow) enables an operator to select and save a grouping of machine performance settings to better meet the method of operation. When the SETUP Hot Key is pressed, the VIDS Message Center text area will display the menu title and the first option. The menu title will remain on the first line, and the display can be cycled by using the arrow keys. An option may be selected by using the OK key when one of the four options is being displayed or by using the associated numeric key. Pressing the CANCEL key at this point will return the display back to the Default (or Background) Mode.
➥
STMG 700 8/98
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Most menus have more options than can be displayed at the same time. To help keep track of the menu, the first line of the message center displays the menu titles. The second line will initially display the first option. The additional options may be viewed by using the arrow keys. • SETUP options
The options are: OPERATOR SETUP MENU 1:SELECT OPER ID 2:SAVE SHIFT SETUP 3:RECALL SETUP 4:CLR ALL CHANGES
STMG 700 8/98
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OPERATOR SETUP MENU 1 : SELECT OPER ID 2 : SAVE SHIFT SETUP 3 : RECALL SETUP 4 : CLR ALL CHANGES
24 Operator Setup Menu • Operator ID
This Setup Option allows the operator to choose a predefined numeric identifier, "OPER ID," for the group of settings. To the control system, the operator assumes the identity of the selected "OPER ID." The OPER ID list contains 10 possible selections. When the SELECT OPER ID menu item is selected, the VIDS Message Center text area will display the menu title and the first option. The menu title will remain on the first line, and the additional options may be viewed by using the arrow keys. An option can be selected by using the OK key when that option is being displayed, or by pressing the associated numeric key. Pressing the CANCEL key at this point will return the display to the Operator Setup Menu.
➥
STMG 700 8/98
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The D11R CD electronic system has several features that can be customized to better match an operating condition or an operator's style. These features all have "default" settings that work over a broad range of applications. The default settings are called "Factory Settings." Temporary changes to the operator settings are called "Shift Settings." If desired, the "Shift Settings" may be permanently stored as an Operator ID. The options are: -SELECT OPERATOR ID1:FACTORY 2:OPERATOR_ID_2 3:OPERATOR_ID_3 4:OPERATOR_ID_4 5:OPERATOR_ID_5 6:OPERATOR_ID_6 7:OPERATOR_ID_7 8:OPERATOR_ID_8 9:OPERATOR_ID_9 After the selection of OPER ID, the VIDS Message Center text display will respond with a confirmation. The confirmation will remain on the display only long enough to be read, then the display will return to the Operator Setup Menu. For example, after a selection of 2:OPER_ID_2, the display will read: OPERATOR ID SET TO OPER_ID_2 The first OPER ID selection is FACTORY, which has predefined settings that have been determined best for most methods of operation. If no selection is made from this menu, the FACTORY settings will be the default. Setting changes made during operation cannot be stored if the FACTORY ID settings have been selected.
STMG 700 8/98
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OPERATOR SETUP MENU 1 : SELECT OPER ID 2 : SAVE SHIFT SETUP 3 : RECALL SETUP 4 : CLR ALL CHANGES
25 • Save setup defaults
Option 2 under the Operator Setup Menu is 2:SAVE SHIFT SETUP. This option is used to store the changes made to the settings associated with an OPER ID. These changes are permanently saved until another SAVE operation is performed. It is important to note that an OPER ID other than FACTORY must first be selected before a SAVE operation can be performed. No provision is made to change the FACTORY defaults. If no OPER ID is selected and the operator tries to save the settings, the display will read: OPERATOR ID MUST BE PICKED BEFORE SETUP
➥
STMG 700 8/98
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If FACTORY is selected and the operator tries to save the settings, the display will read: CANNOT SAVE SETUP FOR FACTORY ID After selecting 2:SAVE SHIFT SETUP, the VIDS Message Center will display a YES/NO prompt to ensure that the operator wants to proceed. The prompt display will read: SELECT SAVE SETUP YES #NO The selection marker "#" is used to indicate which option is selected. Its default location is NO. If the operator wants to proceed, an arrow key must be used to move the selection marker next to YES, and the OK key must be pressed. A confirmation will then be displayed on the VIDS Message Center text display. If the OK key is pressed with the marker next to NO, the display will show the following confirmation and then return to the Operator Setup Menu. NEW SAVE SETUP NO If the OK key is pressed with the marker next to YES, the display will show the following confirmation and then return to the Operator Setup Menu. NEW SAVE SETUP YES
STMG 700 8/98
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OPERATOR SETUP MENU 1 : SELECT OPER ID 2 : SAVE SHIFT SETUP 3 : RECALL SETUP 4 : CLR ALL CHANGES
26
• Recall setup preferences
Option 3:RECALL SETUP will allow the use of settings stored for any OPER ID, while maintaining the previously selected ID number. If, for example, one operator wanted to configure the machine in the same way another operator has stored the settings, that operator could RECALL the other operator's settings. It is important to note that any OPER ID (except FACTORY) must first be selected before a SAVE operation can be performed. If no OPER ID is selected and the operator tries to RECALL settings, the display will read: OPERATOR ID MUST BE PICKED BEFORE SETUP
➥
STMG 700 8/98
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If an OPER ID has been previously selected and the operator selects RECALL SETUP, the display will read the same as when the SELECT OPER ID option was first presented. At this point, the operator can then choose between the 10 possible OPER ID settings to RECALL. Note that the identifier of the OPER ID does not change, but all the associated setting values do change. If a RECALL of OPER_ID_2 operation is successful, the text area will display: SETUP RECALLED TO OPER_ID_2
NOTE: The RECALL function only affects the Shift Setting. To save or copy the settings, select Option 2:SAVE SHIFT SETUP
STMG 700 8/98
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OPERATOR SETUP MENU 1 : SELECT OPER ID 2 : SAVE SHIFT SETUP 3 : RECALL SETUP 4 : CLR ALL CHANGES
27 • Clear setup changes
The Operator Setup Menu Option 4:CLR ALL CHANGES is used to clear all the shift or temporary changes made to the settings associated with an OPER ID. The primary use of this function is to allow an operator who has made many changes the ability to reset to default all the settings. By clearing the changes, the shift or temporary settings for the current OPERATOR ID will be replaced with the FACTORY settings. The clearing will not affect the current OPERATOR ID identifier and will not store the changes unless the Option 2:SAVE SHIFT SETUP operation is performed. It is important to note that an OPER ID must first be selected before a SAVE operation can be performed. If no OPER ID is selected and the operator tries to SAVE settings, the display will read: OPERATOR ID MUST BE PICKED BEFORE SETUP
➥
STMG 700 8/98
- 46 -
After a selection of Option 4:CLR ALL CHANGES, the VIDS Message Center will display a YES/NO prompt to ensure that the operator wants to proceed. The prompt display will read: SELECT FACTORY SETUP YES #NO The selection marker "#" is used to indicate which option is selected. Its default is NO. If the operator wants to proceed, an arrow key must be used to move the selection marker to YES, and the OK key must be pressed. A confirmation will then be displayed on the VIDS Message Center text display. If the OK key is pressed with the marker next to NO, the display will show the following confirmation and then return to the OPERATOR SETUP MENU: NEW FACTORY SETUP NO If the OK key is pressed with the marker next to YES, the display will show the following confirmation and then return to the Operator Setup Menu: NEW FACTORY SETUP YES
STMG 700 8/98
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VITAL INFORMATION DISPLAY SYSTEM (VIDS) OPERATOR KEYPAD 1
2
4
5
3
OK
MENU
GAUGE
X
?
CANCEL
HELP
6
SETUP
SET PITCH
SET HT
SET MACH
0
7
9
MORE
AUT PITCH
FLOAT
28 Operation Parameters • Autopitch key (arrow)
The Autopitch function (arrow) on the D11R CD provides the operator with three blade pitch positions: the LOAD position, CARRY position, and DUMP or SPREAD position. The Autopitch feature automatically brings the blade to these positions at the beginning of these dozing segments. These positions can either be the Factory Default preset positions or custom positions preset by individual operators through the keypad using the procedures described in the Service Manual for the Implement Electronic Control System (Form SENR9457). The keypad is also used to activate the Autopitch Mode. When this mode is activated, the operator uses the message center on the Vital Information Display System (VIDS) and the left and right buttons on the dozer control lever to select the appropriate mode of operation. The left button is referred to as the "mode select button" and the right button is referred to as the "manual mode select button" (see Slide No. 4).
➥
STMG 700 8/98
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Pressing the manual mode select button, regardless of the current Autopitch segment, will change Autopitch to the "REDY TO CARY" segment. The following text will be displayed: BLD PITCH NOT RESET RESET W/MODE SELECT When in the Resetting Mode, the implement control will automatically move the blade pitch. The operator will then, with the engine running, press the mode select (left) button on the dozer control lever to enter the Reset function. The default or background on the text display will read: RESETTING ENG SPD
577.7 700
If the operator does not use the mode select button to reset the Blade Pitch, but acknowledges the event and continues with Autopitch "armed," the default on the text display will read: NOT RESET ENG SPD
577.7 700
When the Blade Pitch Reset function has been completed, the text display will read: REDY TO CARY 577.7 ENG SPD 700 Autopitch may be "disarmed" by a subsequent selection of the AUT PITCH Hot Key. If Autopitch is "armed" and the AUT PITCH Hot Key is pressed, the Autopitch LED will be turned off and the text display will read: AUTO PITCH CONTROL IS NOW OFF
STMG 700 8/98
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VITAL INFORMATION DISPLAY SYSTEM (VIDS) OPERATOR KEYPAD 1
2
3
4
5
6
OK
MENU
GAUGE
X
?
CANCEL
HELP
SETUP
SET PITCH
SET HT
SET MACH
0
7
9
MORE
AUT PITCH
FLOAT
29 • Change BLADE PITCH • SET PITCH key (arrow)
The SET PITCH Hot Key (arrow) enables an operator to change the BLADE PITCH settings which are associated with an OPERATOR ID. These settings can be changed for any of the LOAD, CARRY, or DUMP segments of the dozing cycle. When an OPERATOR ID is selected through the SETUP Hot Key, the values for these pitch settings are made current. An operator may use the SET PITCH Hot Key to change these values for a shift of operation. If the changed values are to be stored for future use, the SETUP Hot Key Option 2:SAVE SHIFT SETUP function must be performed. It is important to note that the blade must be reset to allow changing the pitch settings. To reset the blade, the operator must arm the AUT PITCH button and then press the mode select button (the left button on the dozer control lever). Also, the engine must be running and the implement lockout switch set to the OFF position. When the blade is reset, it will remain reset until the machine or Autopitch is turned off. If the blade pitch is not reset, the value for LOAD, CARRY, and DUMP will remain at "0."
➥
STMG 700 8/98
- 50 -
When the SET PITCH Hot Key is pressed, the VIDS Message Center text area will display the menu title and the first option. The menu title will remain on the first line, and the display can be cycled by using the arrow keys. An option can be selected by using the OK key when that option is being displayed or by pressing the associated numeric key. Pressing the CANCEL key at this point will return the display back to the Default (or Background) Mode. The options are: • BLADE PITCH options
SET BLADE PITCH MENU 1:SET LOAD PITCH 2:SET CARRY PITCH 3:SET DUMP PITCH
If Option 1:SET LOAD PITCH is selected, the display will read: SET BLADE LOAD PITCH 0%
The percentage value may be different, depending on the current position of the blade pitch. The range of blade pitch is from FULL RACK BACK (0%) to FULL DUMP (100%). At this point, the operator can use the dozer control lever rack back trigger lever or the dump rocker thumb lever to change the actual blade pitch position. The displayed percentage value will change according to the change in blade pitch. When the desired LOAD segment blade pitch position is reached, the operator can accept the value with the OK key. The display will then read: SET BLADE LOAD PITCH TO 0%
The display will then return to the SET BLADE PITCH menu where another segment of the blade pitch value can be changed. If no other blade pitch values are to be changed, the operator can press the CANCEL key to return to the Default (or Background) Mode.
STMG 700 8/98
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VITAL INFORMATION DISPLAY SYSTEM (VIDS) OPERATOR KEYPAD
1
2
3
4
5
6
OK
MENU
GAUGE
X
?
CANCEL
HELP
SETUP
SET PITCH
SET HT
SET MACH
0
7
9
MORE
AUT PITCH
FLOAT
30 • BLADE RETURN height • SET HT key (arrow)
The SET HT Hot Key (arrow) enables the operator to change the blade return height setting which is associated with an OPERATOR ID. When an OPERATOR ID is selected through the SETUP Hot Key, the value for blade return height setting is made current. This value is used after a DUMP segment in the Autopitch Mode to determine the blade height during the RETURN segment. When the SET HT Hot Key is pressed, the VIDS Message Center text area display will read SET BLADE RET HT = 100% The percentage value may be different, depending on the current position of the blade pitch. The range of blade height is from FULLY RAISED (100%) to FULLY LOWERED (-100%), where the ground line equals 0%.
➥
STMG 700 8/98
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At this point, the operator can use the dozer control lever to raise or lower the blade to the desired height. The displayed percentage value will change according to the change in blade height. When the desired height is reached, the operator can accept the value by pressing the OK key. The display will then read: SET BLADE RET HT TO 100% After approximately five seconds, the display will return to the Default (or Background) Mode. If the CANCEL key is pressed instead of the OK key, no change will be made in the settings and the display will then return to the Default (or Background) Mode.
STMG 700 8/98
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VITAL INFORMATION DISPLAY SYSTEM (VIDS) OPERATOR KEYPAD 1
2
3
4
5
6
OK
MENU
GAUGE
X
?
CANCEL
HELP
SETUP
SET PITCH
SET HT
SET MACH
0
7
9
MORE
AUT PITCH
FLOAT
31 • SET MACH key (arrow)
The SET MACH Hot Key (arrow) enables the operator to change the spread of the blade and the response of the dozer control lever setting associated with an OPERATOR ID. When an OPERATOR ID is selected through the SETUP Hot Key, the values for spread rate and blade response settings are used. These values are used to set the spread rate to one of four possible settings and the dozer control lever modulation to one of three possible settings. When the SET MACH Hot Key is pressed, the text area display will read: - MACH CONFIG 1:SPREAD RATE
• Dozer control lever response
Pressing the right arrow key once will display the the blade response option and the display will then read: - MACH CONFIG 2:BLD RESPONSE
➥
STMG 700 8/98
- 54 -
When the operator selects the 1:SPREAD RATE option by pressing the OK button, the display will read: - SPREAD RATE [1-4] 1:NONE The operator may scroll through the four options for spread rate using the right arrow key. An option can be selected by using the OK key when that option appears on the second line of the message center or by pressing the associated numeric key. The four options for -SPREAD RATE [1-4]- are: 1:NONE 2:SLOW 3:STD 4:FAST To accept a selection, the OK key must be pressed when the desired option is displayed on the second line of the display area. A confirmation will then be displayed on the message center text display. The display will show the following confirmation and then return to the Operator Setup Menu: SPREAD SET TO STD After approximately five seconds, the display will return to the Default (or Background) Mode. If the CANCEL key is pressed instead of the OK key, no change will be made in the setting and the display will return to the Default (or Background) Mode. When the operator selects Option 2:BLD RESPONSE, the display will read: - BLD RESPONSE [1-3] 1:FINE The operator may scroll through the three options for BLD RESPONSE by using the right arrow key. An option can be selected by using the OK key when that option appears on the second line of the message center or by pressing the associated numeric key. The three options for - BLD RESPONSE - are: 1:FINE 2:STD 3:FAST
➥
STMG 700 8/98
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To accept a selection, the OK key must be pressed when the desired option is displayed on the second line of the display area. A confirmation will then be displayed on the message center text display. The display will show the following confirmation and then return to the Operator Setup Menu: BLD RESPONSE SET TO STD After approximately five seconds, the display will then return to the Default (or Background) Mode. If the CANCEL key is pressed instead of the OK key, no change will be made in the setting and the display will return to the Default (or Background) Mode.
STMG 700 8/98
- 56 -
VITAL INFORMATION DISPLAY SYSTEM (VIDS) OPERATOR KEYPAD
1
2
3
4
5
6
OK
MENU
GAUGE
X
?
CANCEL
HELP
SETUP
SET PITCH
SET HT
SET MACH
0
7
9
MORE
AUT PITCH
FLOAT
32 • FLOAT key (arrow)
Two steps are required to activate the BLADE FLOAT function. The first step is referred to as "arming" FLOAT, and the second step is referred to as "activating" FLOAT. The FLOAT Hot Key (arrow) is used by the operator to "arm" or "disarm" the BLADE FLOAT feature. When BLADE FLOAT is used, the only downward force on the blade is the weight of the blade. If BLADE FLOAT is "disarmed" and the FLOAT Hot Key is pressed, the Blade Float LED (located below the keypad) will turn on and the text display will read: BLADE FLOAT CONTROL IS NOW ON
➥
STMG 700 8/98
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After "arming" BLADE FLOAT, the operator must then use the dozer control lever to activate the feature. To activate BLADE FLOAT, the dozer control lever is moved to the FULL LOWER position and either held in that position or allowed to return to the center position. Raising the blade with the dozer control lever will deactivate the FLOAT Mode. While the feature is "armed," it may be repeatedly activated or deactivated. To "disarm" the BLADE FLOAT feature, press the FLOAT Hot Key again. The FLOAT LED will turn OFF and the text display will read: BLADE FLOAT CONTROL IS NOW OFF
STMG 700 8/98
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33
CONCLUSION This presentation has discussed the major features of the implement systems for the D11R CD Carrydozer. When used in conjunction with the service manual for this tractor, the information in this package should help the serviceman correctly diagnose a problem in the implement systems. For service repairs, adjustments, and maintenance, refer to the Operation and Maintenance Manual, Service Manual, and other related service publications.
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SLIDE LIST 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23 24. 25. 26. 27. 28. 29. 30. 31. 32. 33.
Title slide Implement system component locations Hydraulic tank Implement controls Dozer control valve Dozer tilt spool (HOLD) Dozer tilt spool (TILT RIGHT) Dual tilt solenoid valve (HOLD) Dual tilt circuit (TILT RIGHT) Dual tilt circuit (BLADE DUMP) Dozer lift spool (HOLD) Dozer control valve (HOLD) Dozer control valve (RAISE) Dozer lift spool (HOLD) Fan drive hydraulic system Fan pumps Ripper control valve Ripper and pilot systems (RAISE) Ripper and pilot systems (LOWER) Electro-hydraulic pilot system (HOLD) Implement lockout switch VIDS keypad VIDS keypad (operator setup menu) VIDS keypad (select oper id) VIDS keypad (save shift setup) VIDS keypad (recall setup) VIDS keypad (clr all changes) VIDS keypad (autopitch operation) VIDS keypad (set pitch) VIDS keypad (set ht) VIDS keypad(set mach) VIDS keypad (float) D11R CD Carrydozer
1 0 1 1 0 0 1 0
1 0 1 0 1 0 1 0
1 0 1 0 1 1 1 0
RACK DUMP QUICK DUMP
BLADE LIFT
1 0 1 0 0 0 0 0
LIFT
1 0 1 0 1 0 0 0
TILT R
1 0 1 1 0 0 0 0
TILT L
BLADE LIFT/TILT
- 60 -
"1" - Solenoid is activated "0" - Solenoid is not activated
E1 Implement shutoff E2 Lower/Float E3 Raise E4 Left Tilt/Rack E5 Right Tilt/Dump E6 Quick-Dump E7 Pitch E8 Single Tilt
SOLENOIDS:
BLADE LIFT AND PITCH
LIFT
ELECTRO-HYDRAULIC BLADE CONTROL
STMG 700 8/98 Serviceman's Handout No. 1
1 0 0 1 0 0 1 0
1 0 0 0 1 0 1 0
1 0 0 0 1 1 1 0
RACK DUMP QUICK DUMP
BLADE LIFT
1 0 1 0 0 0 0 0
LIFT
1 0 0 0 1 0 0 0
TILT R
1 0 0 1 0 0 0 0
TILT L
BLADE TILT
- 61 -
"1" - Solenoid is activated "0" - Solenoid is not activated
E1 Implement shutoff E2 Lower/Float E3 Raise E4 Left Tilt/Rack E5 Right Tilt/Dump E6 Quick-Dump E7 Pitch E8 Single Tilt
SOLENOIDS:
BLADE PITCH
TILT
ELECTRO-HYDRAULIC BLADE CONTROL
STMG 700 8/98 Serviceman's Handout No. 2
1 1 0 1 0 0 1 0
1 1 0 0 1 0 1 0
1 1 0 0 1 1 1 0
RACK DUMP QUICK DUMP
BLADE L0WER
1 1 0 0 0 0 0 0
LIFT
1 1 0 0 1 0 0 0
TILT R
1 1 0 1 0 0 0 0
TILT L
BLADE LOWER/TILT
- 62 -
"1" - Solenoid is activated "0" - Solenoid is not activated
E1 Implement shutoff E2 Lower/Float E3 Raise E4 Left Tilt/Rack E5 Right Tilt/Dump E6 Quick-Dump E7 Pitch E8 Single Tilt
SOLENOIDS:
BLADE LIFT AND PITCH
LOWER
ELECTRO-HYDRAULIC BLADE CONTROL
STMG 700 8/98 Serviceman's Handout No. 3
FROM PILOT MANIFOLD
SHUTTLE VALVE
TO ROD END TILT CYLINDER
TO ENGINE RETARDER SOLENOID
TO HEAD END TILT CYLINDER
SECTION A-A
HOLD
FROM PILOT MANIFOLD
FROM LARGE PUMP
FROM PILOT VALVE
FROM SMALL PUMP
- 63 -
FROM RIPPER VALVE SIGNAL PORT
LIFT RELIEF VALVE
TILT SPOOL
TILT RELIEF VALVE
DOZER CONTROL VALVE
STMG 700 8/98 Serviceman's Handout No. 4
PILOT SUPPLY FILTER
TANK
CASE DRAIN LINE
SOLENOID
FAN RETURN FILTER
FAN DRIVE MOTOR
OIL COOLER BYPASS VALVE
OIL COOLER
RADIATOR
- 64 -
SUCTION LINE
FAN PUMPS
FAN PUMP CASE FLUSHING FLOW
TO ELECTRO-HYDRAULIC PILOT MANIFOLD
FAN DRIVE HYDRAULIC SYSTEM
STMG 700 8/98 Serviceman's Handout No. 5
RIPPER TIP SPOOL RIPPER LIFT SPOOL
LOAD CHECK VALVE
FAN PUMPS
RAISE
TO DOZER CONTROL VALVE
IMPLEMENT PUMP
RIPPER AND PILOT SYSTEMS
- 65 -
LIFT CYLINTERS
MAKEUP VALVE
BLADE LOWER/ FLOAT
TILT BLADE RIGHT/ RAISE ON/OFF DUMP SOLENOID VALVE
TIP RIPPER TILT OUT RAISE LEFT/ RACK
RIPPER TIP IN LOWER
STMG 700 8/98 Serviceman's Handout No. 6
TO TILT CONTROL VALVE
FROM TILT CONTROL VALVE
TILT RIGHT
RIGHT TILT CYLINDER
LEFT TILT CYLINDER
DUAL TILT CIRCUIT
- 66 -
FROM TRIGGER SWITCH
FROM FAN CIRCUIT
TO HEAD END
TO ROD END
STMG 700 8/98 Serviceman's Handout No. 7
TO TILT CONTROL VALVE
FROM TILT CONTROL VALVE
FROM QUICKDUMP VALVE
BLADE DUMP
RIGHT TILT CYLINDER
LEFT TILT CYLINDER
DUAL TILT CIRCUIT
- 67 -
FROM TRIGGER SWITCH
FROM FAN CIRCUIT
TO HEAD END
TO ROD END
STMG 700 8/98 Serviceman's Handout No. 8
SESV1700 8/98
Printed in U.S.A.
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