Operation & Maintenance Manual

OPERATION AND MAINTENANCE MANUAL (The contents given in this manual are not binding and are subject to change without notice. The details given are guidlines and are for illustration purpose only.)

HYVA INDIA PVT. LTD. Plot No. EL-215, MIDC, MAHAPE, Navi Mumbai - 400 701

FOREWORD

Dear Customer, This manual outlines the maintenance and operating practices of Hyva Tipping System fitted on your vehicle. The purpose of this manual is to assist you in maintaining the system and get maximum life out of components. This is also to educate you in good operating practices and safety of equipment at all times. Overall it helps you to obtain better performance at optimum operating costs. All service and maintenance tasks are to be carried out at the specified intervals. This manual briefs about the system and components for your understanding and knowledge. Fault diagnosis at the end helps you in diagnosing the problem in a systematic manner. Some of the items/accessories/features given in this book may not be fitted on your vehicle, but they are applicable to other versions.

Hyva India Pvt. Limited Mumbai

60

INDEX

l

Safety

1

l

Periodic Check List

5

l

Recommended Replacement Period for Consumables

6

l

Recommended Hydraulic Oil Specification

6

l

Tipper Operation Instruction

7

l

Major Operating Parts l

HYVA P.T.O

11

l

HYVA Gear Pump

17

l

HYVA Tipping Valve

22

l

Air Control for P.T.O / Valve

23

l

Tank Return Line Filter

24

l

Air Breather Filter

25

l

Cylinder Nomenclature

26

l

Tipper Model and Cylinder

27

Cylinder Repair Instructions

30

l

Hyfix Body Clamp

40

l

Hydraulic Hose Orientation

42

l

l

Fault Diagnosis

43

l

Greasing Layout

45

l

Specific Densities

48

61

blank page

SAFETY IMPORTANT SAFETY NOTICE Proper service and repair is extremely important for the safe operation of your machine. The service and repair technique recommended by HYVA and described in this manual are both effective and safe methods of operation. Some of these operations require the use of tools specially designed by HYVA for the purpose. SAFETY GENERAL PRECAUTIONS Mistakes in operation are extremely dangerous. Read the Operation and Maintenance Manual carefully BEFORE operating the machine. 1 Before carrying out any greasing or repairs, read all the precautions given on the decals which are fixed to the machine. 2 When carrying out any operation, always wear safety shoes and helmet. Do not wear loose work clothes, or clothes with buttons missing. l Always wear safety glasses when hitting parts with a hammer. l Always wear safety glasses when grinding parts with a grinder, etc. 3 If welding repairs are needed, always have a

4

5

6

trained, experienced welder carry out the work. When carrying out welding work, always wear welding gloves, apron, glasses, cap and other clothes suited for welding work. When carrying out any operation with two or more workers, always agree on the operating procedure before starting. Always inform your fellow workers before starting any step of the operation. Before starting work, hang “UNDER REPAIR” signs on the controls in the operator’s compartment. Keep all tools in good condition and learn the correct way to use them. Decide a place in the repair workshop to keep tools and removed parts. Always keep the tools and parts in their correct places. Always keep the work area clean and make sure that there is no dirt or oil on the floor. Smoke only in the areas provided for smoking. Never smoke while working.

PREPARATIONS FOR WORK 7 Before adding oil or making any repairs, park the machine on hard, level 1

SAFETY ground, and block the wheels or tracks to prevent the machine from moving. 8 Before starting work, rest dump body on prop and hang “UNDER REPAIR” board on them. 9 When disassembling or assembling, support the machine with blocks, jacks or stands before starting work. 10 Remove all mud and oil from the steps or other places used to get on and off the machine. Always use the handrails, ladders or steps when getting on or off the machine. Never jump on or off the machine. If it is impossible to use the handrails, ladders or steps, use a stand to provide safe footing. PRECAUTIONS DURING WORK 11 When removing the oil filler cap, drain plug or hydraulic pressure measuring plugs, loosen them slowly to prevent the oil from spurting out. Before disconnecting or removing components of the oil and air circuits, first remove the pressure completely from the circuit.

2

12

13

14

15

The oil in the circuits is hot when the engine is stopped, so be careful not to get burnt. Wait for the oil to cool before carrying out any work on the oil circuits. Before starting work, remove the leads from the battery. Always remove the lead from the negative (-) terminal first. When raising heavy components, use a hoist or crane. Check that the wire rope, chains and hooks are free from damage. Always use lifting equipment which has ample capacity. Install the lifting equipment at the correct places. Use a hoist or crane and operate slowly to prevent the component from hitting any other part. Do not work with any part still raised by the hoist or crane. When removing covers which are under internal pressure or under pressure from a spring, always leave two bolts in position on opposite sides. Slowly release the pressure, then slowly loosen the bolts to remove.

SAFETY 16

17

18

19

20

When removing components, be careful not to break or damage the wiring. Damaged wiring may cause electrical fires. When removing piping, stop the oil from spilling out. If any oil drips on the floor, wipe it up immediately. Fuel or oil on the floor can cause you to slip, or can even start fires. As a general rule, do not use gasoline to wash parts. In particular, use only the minimum of gasoline when washing electrical parts. Be sure to assemble all parts again in their original places. Replace any damaged parts with new parts. l When installing hoses and wires, be sure that they will not be damaged by contact with other parts when the machine is being operated. When installing high pressure hoses, make sure that they are not twisted. Damaged tubes are dangerous, so be extremely careful when installing tubes for high pressure circuits. Also, check that connecting parts are correctly installed.

21

22

23

24

25

When assembling or installing parts, always use the specified tightening torques. When installing protective parts such as guards, or parts which vibrate violently or rotate at high speed, be particularly careful to check that they are installed correctly. When aligning two holes, never insert your fingers or hand. Be careful not to get your fingers caught in a hole. When measuring hydraulic pressure, check that the measuring tool is correctly assembled before taking any measurements. While carrying out welding on tipper, earthing should be done nearer to the welding spot. Earthing should not be done through cylinder and other hydraulic components, to avoid damage due to sparking. While carrying out welding on head board / load body, the tipping cylinder and other hydraulic components should be covered with fireresistant cover so that welding spatters will not damage stages and seals.

3

SAFE PRACTICES Do’s

Don’ts

OVER LOAD

LOAD UNEVEN

TIP ON UNEVEN GROUND

STAY UNDER AN UNSUPPORTED BODY

STAY IN THE WORKING AREA OF THE TIPPER

DRIVE WITH RAISED BODY

TIP WITH TRAILER IN AN ANGLE TO THE TRUCK

4

PERIODIC CHECKLIST DAILY CHECK LIST (BEFORE STARTING THE TRUCK) l

Check the Oil level in the Oil Tank. Oil level has to be in the middle of the sight glass or level Indicator, while the body in resting on the subframe.

l

Make visual inspection of Hydraulic System i.e. P.T.O., Pump, Tank, Valve, Hoses and Couplings for leakages.

l

Check all Pneumatic and Hydraulic connections for slackness.

l

Care should be taken while tightening Pivot Mounting Bolt, so that Pivot Spring doe’S not get compressed completely and there is minimum gap equivalent to thickness of a Hacksaw Blade so that this Spring can offer required compression under load.

PERIODIC CHECKLIST - WEEKLY l

Breather Element must be cleaned once in a week with compressed air only.

l

Lubricate all greasing points on the tipper. (Cylinder Eye End, Stabilizer, Body Prop, Rear Hinge Shaft - Refer Greasing Layout)

l

Check Gearbox Oil level.

l

Check Pivot bracket bolts, Attachment bolts (80 NM) and Cylinder Cradle Mounting Brackets Bolts, Pump Mounting Bolts and tighten if necessary. Tightening Torque for Cylinder Mounting Bracket Bolts is 200NM.

5

RECOMMENDED REPLACEMENT

Sl. No. 1

Description of Items

Replacement Periods

Air Breather Filter Element

Once in every 4 months in normal working condition. (Non Mining application) Once in every 2 months in dusty working condition. (Mining application)

2

Return Line Filter Element

Once in every 4 months in normal working condition. (Non-Mining application) Once in every 2 months in dusty working condition. (Mining application)

3

Hydraulic Oil

First change after 6 months and later once in every year.

Note : Please note, over and above the schedule, Filter and Breather elements need to be replaced whenever the hydraulic oil is replaced. RECOMMENDED HYDRAULIC OIL We recommend Super-clean anti-wear, oxidation stable and rust preventive Hydraulic oil conforming the characteristics according to BIS11656-86 and DIN 51524/2 (Viscosity grade - 68) Make

6

Brand & Type

Working Temperature From To

B.P.

Hydrol 68

- 5OC

50OC

H.P

Enklo 68

- 5OC

50OC

Castrol

Castrol WH 15

- 5OC

50OC

ELF

Elforia DS 68

- 5OC

50OC

IOC

SERVO System HLP 68

- 5OC

50OC

OPERATION INSTRUCTIONS Before putting your vehicle into operation, it is necessary to familiarize yourself thoroughly with the mode of the operation and function of the tipper. LOADING l Body must be uniformly loaded. l Please load as per the specification chart provided in order to ensure longer life and safer operation. l Ensure proper loading or hopping process in order to avoid undue impact load on vehicle. TIPPING l Before tipping, make sure the tipper is standing on level & stable ground. l Make sure that front wheels are in line with rear wheels. l Ensure that hand brake of the vehicle is in “ON” position. l In neutral gear, start the engine, build up the air pressure upto 7 kg/cm2, then press the clutch pedal and engage the PTO slowly using air control valve lever inside the cabin l In case of vehicle with tail gate system, ensure that the safety lock pin is removed & stowed in open position from the tail door locking mechanism. l Do not attempt to tip the body without ensuring that mechanical lock pin is removed from the tail door locking mechanism. Otherwise this will damage the locking mechanism. l Start tipping by using the air control inside the cabin. LOWERING l Using the air control inside the Cabin, lower the tipper body. Lowering operation automatically disengages PTO. l Do not put the engine in high R.P.M, while lowering the body. GENERAL TIPS l Please ensure the raising of body prop while doing any work on chassis or sub-frames underneath the body. l Please remember, incorrect operational practice may be fatal to the vehicle and cause even casualty of human life. WARNING : l Applying side load and dynamic forces to any cylinder is dangerous. l Working under an unsupported body is a danger to life. 7

HYDRAULIC TIPPING SYSTEM Hyva Tipping System comprises of following hydraulic components to provide highest level of tipping efficiency. l

HYDRAULIC TANK

l

TIPPING VALVE

l

AIR CONTROL VALVE

l

GEAR PUMP

l

POWER TAKE-OFF (PTO)

l

HYDRAULIC CYLINDER - TIPPING CYLINDER

Return Line Filter Assly. Breather Assly. Cylinder Assly.

3DHMP Valve

Air Control Valve

PTO & Pump

HYVA – Tipping Diagram

8

HYDRAULIC & PNEUMATIC CIRCUIT DIAGRAM WITH 3DHMP VALVE

HYDRAULIC & PNEUMATIC CIRCUIT DIAGRAM

9

HYDRAULIC & PNEUMATIC CIRCUIT DIAGRAM WITH PT VALVE

HYDRAULIC & PNEUMATIC CIRCUIT DIAGRAM

10

P.T.O P.T.O : A P.T.O (Power Take Off) is an auxillary gear box mounted on the transmission. Its function is to transmit the power from rotation of the engine. Hyva Supplies the following P.T.Os : I. Side mounted P.T.O : 1. G600 V1 Type (Remote Drive) 2. G600 V2 Type (Direct mounting) II. Rear mounted P.T.O : 1. Dual Block P.T.O. 2. Mono Block P.T.O. III. Use of the P.T.O IMPORTANT : When engaging and disengaging the PTO, always press the clutch pedal! WORKING TEMPERATURE AND LOAD CONDITIONS The temperature depends on the way the PTO is used and it is recommended to keep it between the following values. Short duration (less than 15 minutes) max. 120OC, long duration (more than 15 minutes) max. 100OC. The PTO temperature is affected by various factors; it is possible to reduce overheating by: l Changing the oil more often in case of heavy duty system. l When the PTO is side mounted, ensuring that the gear backlash is accurately checked. l When the PTO is rear mounted, considering to provide the PTO with a supplementary lubrication kit. IV. PTO Installation a. Side mounted PTO installation : l Empty or reduce the gearbox oil level, check cleanliness. If oil is dirty or contaminated it should be replaced. (Pict. 1) Notice : In some applications (for example automatic Allison Gearbox) it is not necessary to empty gearbox. Always check gearbox service manual. Picture. 1 11

P.T.O l

Remove gearbox aperture cover and accurately clean the gearbox aperture surface (Pict. 2)

Picture. 2

l

l

l

-

Check gearbox gear teeth and the gear backlash (Pict. 3) Open the PTO package. Use PTO specific mounting kit and if necessary spacers. Studs for mounting onto the gearbox : Accurately check that the holes in the gearbox are threaded. Be careful that studs do not interfere with gears.

Picture. 3

-

Fit the studs. (Pict. 4) shows a typical mounting example. Backlash check between gear tooth and spacer insertion: To get backlash of 0.15 + 0.4 mm, fit spacers between PTO and gearbox as necessary. Backlash checking can be carried out in two ways. Picture. 4 12

P.T.O -

In case of PTOs equipped with inspection plug, check by hand, (rocking the gear to get the “feel” for gear backlash) or by means of a dial gauge (Pict. 5). The use of a dial gauge is recommended as it is much more accurate. - In case of PTOs without inspection plug, adjustment is carried out in stages. The PTO has to be checked against the transmission flange by adding spacers until there is no backlash. After that, another 0.5 mm spacer should be added and the nuts tightened. Recommendations on seal and spacer use. - Remember that once the nuts have been tightened, the seal thickness reduces, resulting in a similar backlash reduction. The backlash therefore has to be checked even after tightening. - Available seals (Pict. 6) have a thickness of 0.5 and 0.25 mm (special series). - When a spacer is fitted, use a gasket to ensure tightness (at least one on both sides). - In order to avoid the seals sticking to each other, use grease. NEVER use adhesive fluid when the PTO mounting kit requires special gasket. USE adhesive fluid only when the PTO mounting kit DOESN’T involve any gasket.

Picture. 5 0.5 mm

0.25 mm

Picture. 6

Picture. 7 13

P.T.O Once the suitable thickness has been determined, tighten the nuts with a torque wrench (see tightening torque table) Notice : Once the nuts have been tightened, the backlash has to be rechecked and if necessary the shiming operation may be repeated. When the installation operation has been completed, fill the gearbox with oil (Pict.7) Notice : In case of applications with separate lubrication (for example on Allison transmission) an external tube kit is needed to be fitted. After installing operations, proceed with the checks. b. Rear mounted PTO installation : l Empty or reduce the gearbox oil level, check cleanliness. If oil is dirty or contaminated it should be replaced. Notice : In some applications (for example automatic Allison gearbox) it is not necessary to empty gearbox. l Remove gearbox aperture cover and accurately clean the gearbox aperture surface (Pict. 8) l If a shaft kit is provided for the application, carefully read the relevant mounting instructions. l PTO mounting (see pict.9)

14

Picture. 8

Picture. 9

P.T.O

l

l

c.

The typical way of mounting is shown in the picture. It is recommended to lock studs or bolts with locking fluid. (see tightening torque table) Notice : In case of a connection to an ISO flange pump: if the oil seal is fitted to the pump, then the pump must be fitted to the gearbox before filling with oil. When the fitting operation is complete, refill gearbox with oil (Pict.10) Notice : In case of application with separate lubrication, a supplementary lubrication kit should be fitted. When installation is completed, proceed with the checks (see ‘After Installation checks’ on next page)

Picture. 10

Mounting bolt torques : Thread

Studs (tightening on Gearbox)

Screw & Nuts

M8

10 NM

25 NM

M10

20 NM

50 NM

M12

30 NM

80 NM

3/8”

10 NM

25 NM

7/16”

20 NM

50 NM

15

P.T.O V. AFTER INSTALLATION CHECKS. : Once the installation phase is complete, the following checks are recommended. Engagement / disengagement check

Oil level check

Oil Leak

Tightening bolts check

16

Performance soon after engine start. If a clash is heard, this may be due to one of the following: - Clutch not working properly - There’s no or insufficient air pressure. Carry out an oil check when the engine is still cold and top up if necessary. Check to be carrier out under all the working conditions, with PTO engaged, gearbox in neutral position. In case of a side mounted PTO, an excessive noise may mean a wrong backlash according the following: - High pitched noise; backlash is too tight Rattle noise; excessive backlash. Normally bolts tend to loosen because of the seal setting. It is recommended that all bolts and nuts are checked after a few hours of work checking the tightening by means of a torque wrench. With side mounted PTO’s, recheck the backlash after tightening.

GEAR PUMP Gear Pump specifications

52 cc

87 cc 86.39

82 cc 81.29 cm3

Displacement per revolution

51.88

Maximum peak pressure

230 Bar 230 Bar 230 Bar

Maximum intermittent pressure

230 Bar 230 Bar 220 Bar

Maximum Continuous pressure

230 Bar 230 Bar 190 Bar

Oil temperature range:

-25OC to -25OC to 110OC 110OC

Inlet pressure range:

230 Bar 230 Bar 0.7-3 Bar (abs)

-25OC to 110OC

Hyva Gear Pump (if fitted) Hyva Gear pumps. Gear pump is a model with two gearwheels having external teeth. Normally we use Gear Pumps with one direction of rotation for following reasons. l

Higher maximum working pressure and efficiency compared to bidirectional pumps.

l

As the required pressure range for the tippers application is not more than 170 bar. The direction of rotation can be changed in case if required. (The procedure for changing the direction is given on the next page).

We are using, 52.cc/82.cc/87.cc & 109.cc pumps with Hyva tipping system. Note: 82/ 87 denotes the displacement of oil in cc per rev i.e. 82.cc pump runs at 1000 rpm capacity will be 82 lts/min We recommend operating tipper application with correct Engine RPM as per PTO ratio of that particular housing and gears. Raving up the engine can lead to Pump failure or excessive wear and tear on the Pump. Mode. Usually it roughed from 1000 to 1200 engine rpm.

17

GEAR PUMP Basic principle of Gear Pump

One of the two gearwheels is driven from outside (Drive Gear) and drives the other gearwheel (Driven Gear). With the right hand rotation of the top gearwheel (consider fig.) oil is sucked from the LHS port (Pump suction). Oil trapped in between the gear teeth and the pump body travels along the periphery of the Pump body towards the RHS port (Pump delivery). As the teeth and the side of the gears are closely sealed against the Pump body and the Thrust Plates, pressure builds up against the resistance to the oil flow at the delivery port.

18

GEAR PUMP Hyva Gear Pump (82 cc Black)

SL. Description

Qty.

SL. Description

Qty.

1

Pump body

1

15

Circlip S1372

1

2

Front Cover

1

16

Back Up Ring

2

3

Trust plate

2

17

Mounting Ring

1

4

Drive Gear

1

18

Sleeve Bearing

4

5

Driven gear

1

19

Spacer Ring

1

6

Roller Bearing

2

20

Threaded Locking Ring

1

7

Screw

8

22

‘O’ Ring

1

8

Grub screw

1

23

Support Shaft

1

9

Washer

8

24

Steel Brush

4

10

Lock washer

1

25

protection Ring

1

11

‘O’ Ring

1

26

Circlip

1

12

Seal

2

27

Support Ring

1

13

Shaft Seal (42x55x7)

1

28

Shaft Seal (24 x 40 9)

1

14

Circlip

1

29

Roller Bearing 32007

1 19

GEAR PUMP HYVA GEAR PUMP OVERHAULING PROCEDURE : Please follow the steps mentioned below: l Remove the pump from vehicle and place it on a clean table l Loosen all allen bolts by using suitable allen key l Tap the flange area and remove the cover of the pump l Slowly remove the O-ring from groove of cover plate. Check and replace, if necessary l Remove the oil seal from pump shaft. Check the condition and replace, if necessary l Remove the top thrust plate. Also, remove the thrust plate seal and anti extrusion ring l Remove the set of drive and driven gear l Follow the above instruction for removing the bottom thrust plate l Check clearance between housing and gear teeth. The clearance should not be more than 0.005”. l Check and replace the seal and backup ring, if necessary l Clean each part thoroughly and assemble back in reverse sequence of dismantling pump l Check the backlash of gears l Belt tightening torque - 20 NM TO BLEED THE SYSTEM : The Hyva Gear pumps, as well as the Hyva cylinders do not have a bleeder screw. After installation of tipping system some components can have some amount of air trapped inside. Therefore it becomes necessary to bleed the system. To bleed the system, follow some of the instructions given here. l

Loosen the pressure hose of the pump a little so that the air in the suction hose and the pump can escape and the system will be filled up with oil.

l

Loosen the pressure hose and the cylinder hose a little. Run the pump at a low speed and put the tipping valve in “Tip” position. After a short while once the air escapes from the system, the connections must be tightened.

20

GEAR PUMP l

As the piston of the cylinder is closed, only a little air remains between the stages. This will “mix-up” with the oil after a few tips and will escape via the oil tank.

l

If air remains in the system after 8-10 tips the position of the suction hose must be checked and the connections must be tightened. If the temperature is high or the oil is thick, one must wait longer before bleeding a second time.

l

Top up the oil tank as oil has now entered the cylinder, hoses and oil filter.

l

Check the working pressure and check that the pump is operating properly. It is too noisy or if there are shocks in the hoses, air may still be there in the system and the pump is facing cavitation. Bleed the system.

l

Check the working pressure. Check if the complete hydraulic system works properly. (Working pressure - 170 bar)

21

HYVA TIPPING VALVE GENERAL MOUNTING INFORMATION l The tipping valve is mounted on oil tank through valve mounting block. To prevent the valve housing deformation the mounting plate surface or block must be completely flat. l Before mounting the valve, remove the plug underneath the valve and use the O-ring between valve return line opening and valve block. l Recommended torque for tipping valve mounting bolts is 15 NM. DISMANTLING TIPS l The Valve must be dismantled in a clean area and using the correct tools. l If a fault has been developed which can be traced to the valve it is possible to replace the internal seals and a-rings. l All parts should be thoroughly cleaned before reassembly. l Hyva recommends that total hydraulic circuits must be tested on completion of fitting as per following: l Make sure that the body is fully lowered and the PTO is disengaged. l

Connect a 1/18” B.S.P. threaded pressure gauge to the point shown on the figure.

l

Engage the P.T.O. and tip the body fully. Hold the lever at tipping condition until the oil get relieves to tank.

l

Check for leaks in the system and read the pressure gauge.

PRESSURE CHECKING POINTS

pressure gauge

System working pressure is 170 bar 22

pressure gauge

AIR CONTROL FOR P.T.O. / VALVE GENERAL INFORMATION l

The air control for P.T.O/Valve with automatic P.T.O. disengagement is a three way operated, variable air control (for P.T.O. engagement, tipping and lowering operation).

l

When used with a compatible tipping valve with proportional lowering, the proportional movement of the air control lever can regulate the speed of descent of the body.

l

Hyva Air controls are easy to mount to the cabin.

l

The functions of Hyva air controls are clearly indicated with symbol.

MOUNTING OF THE AIR CONTROL l

When air control is mounted next to the driver’s seat, a strong support should be used.

l

Ensure using rubber grommets to protect air tubes and to prevent entry of dust and water inside cabin.

l

For trouble free operational life of the entire pneumatic system, the condensed water in the air tank should be regularly drained.

l

Also make sure that the air tubes are not too close to sharp objects, moving parts exhaust and compressor lines, should not get to stretched.

l

Please take precaution to protect pneumatic lines while doing welding in nearby area.

23

RETURN LINE FILTER RETURN LINE FILTER ASSEMBLY Return line filter assembly is located on top of the hydraulic oil tank & adjacent to tipping valve. Oil from cylinder on it return path, (Cylinder Tipper Valve) returns to the tank through Return line filter. The function of RLF assembly is to remove contamination from the hydraulic oil on its way back to the tank. (Rating 25 Microns) It consists the following Parts 1 Cover 5. Flange Seal 2. Aluminum Body 6. ‘O’ Ring 3. Flange Pipe 7. ‘O’ Ring 4. Return Line Filter Element 8. Spring 1 2 3

4

5

6 5 2 5

Note: Periodic replacement of filter element is strongly advised to prevent premature wear and failure of tipping system components.

CHECKS l Filter element must be replaced as per the recommendation given in periodic check list. 24

AIR BREATHER FILTER Breather Assembly As the name indicates, this helps the Hydraulic oil tank to ‘Breath in’ or ‘Breath out’ air, in order to maintain the atmospheric pressure inside tank, even when there is lower level of oil (in tipped condition) or higher level of oil (due to lowering down or heat generation in the system), in order to prevent any kind of deformation of tank. A Breather filter element of 10-micron filtration capacity ensures entry of dust and foreign particle – free air inside hydraulic tank. It consists of the following parts 1. Cover 2. Housing 3. Breather Filter Element 4. Seal 5. Screw 6. Sleeve

Note : Breather Element must be replaced periodically as per the recommendations. 25

CYLINDER NOMENCLATURE HYVA Cylinder Nomenclature To identify the Type and Part number look for the Cylinder name Plate, which is located above the Trunnion & below the oil Port of the Cylinder. Make sure about all the parameters before placing an order for Assembly or Spare Parts. In Front End Tipping Systems used generally in India, Hyva is using two types of Cylinders, i.e. FE & FC. (Find herewith the Nomenclature for Front End Cylinder with Cover - FC) CYLINDER NOMENCLATURE

FE - 169 - 4 - 4620 - 001-- HC FC - 105 - 3 - 3210 - 001-- HC Type of cylinder Diameter of First Stage (mm) No. of Stages Stroke length (mm) Position of inlet Hard Chromed

Eye with trunnion FE

l

26

Cover with Trunnion FC

Stroke Length: Distance travelled between close to open length by cylinder eye or cover trunnion.

Application

Cylinder Model

49

UPTO 8.5

4225

R.B

Sand, Gravel

Sand, Gravel

FC-105- FC-105-33-02635 / 03210 / FC-110-3- FC-110-302635 03210

49

UPTO 10

Volume in CU.M

Angle of Tipping Ø

3625

Wheel Base IN mm

STD

SK-1613

Model

Tipper Type

TATA

Make

50

6

3580

STD

LPK-1518

TATA

49

8

3580

STD RL

LPK-1618

TATA

49

10

3580

STD RL

LPK-1618

TATA

Sand, Gravel

Sand, Gravel

Coal

Coal

FC-105-3- FC-105-3- FC-105-3- FC-105-30321003210-001 03210-001 03210-001 001HC

50

8.5

3625

STD

LPK-1615

TATA

49

14

3880

STD

Sand, Gravel

RB

OB & Small Rocks

FE-129-303880

53

12 & 14

3880

LPK2516

TATA

FE-129-303700

TIPPER MODELS, CYLINDERS & APPLICATION

TIPPER MODELS, CYLINDERS & APPLICATION

27

28

TATA

LPK2516

RB (HYDTD)

3880

12

49

FC-1293-03700

Sand, Gravel

Make

Model

Tipper Type

Wheel Base IN mm

Volume in CU.M

Angle of Tipping Ø

Cylinder Model

Application

Sand, Gravel

FC-1293-03700000A

49

14

3880

STD RL

LPK2518

TATA

Coal

FC-1293-04270 -000A

46

20

4880

STD RL

LPK2518

TATA

OB & Small Rocks

FE-1293-03880

45

UPTO 16

4880

RB

LPT2515

TATA

Mining (OB & Medium Rocks)

FE-1413-03830 -001

52

15

3930

RB

55

15

4030

RB

FE-1413-03640 -001

50

16

3930

STD

DAEWOO

TATA

FE-149-4 -04620 -009A

51

23

2940

STD

3135

TATA

Mining Construct- Construct(OB & ion, Coal ion, Coal Medium Rocks)

FE-1493-03880 -009A

NOVUS

TATA

TIPPER MODELS, CYLINDERS & APPLICATION

Mining (OB & Medium Rocks)

FE-169-4 -4620 -009A

52

18

2940

RB

3135

TATA

TIPPER MODELS, CYLINDERS & APPLICATION

4597 (180")

6x4

14/16

49

Wheel Base IN mm

Chassis Type

Volume in CU.M

Angle of Tipping Ø

53

14

6x4

3831 (150")

RB

48

16

6x4

4525

STD

MAN

53

14

6X4

4525

RB

MAN

53

16

6X4

4525

RB

MAN

FORCE FORCE FORCE MOTORS MOTORS MOTORS

53

14

6X4

4300

RB

2523

AMW

51

16

6X4

4300

STD

2523

AMW

53

18

8X4

4380

RB

ACTROS 4840

53

18

8X4

4053

RB

P380

MERCED SCANIA ES

52

14

6X4

3400

RB (Tunnel Truck)

FM-9

Volvo

55

18

8X4

4088

RB

FM-400

VOLVO

Application

Sand, Gravel

OB & Small Rocks

Sand, Gravel

OB & Small Mining (OB Mining (OB Rocks & Medium & Medium Rocks) Rocks)

Sand, Gravel

Mining (OB Mining (OB Mining (OB Mining (OB & Medium & Medium & Medium & Medium Rocks) Rocks) Rocks) Rocks)

Cylinder FE-129- FE-129- FE-129- FE-129- FE-149- FE-129- FE-129- FE-169- FE-169-4 FC169-4 FE-169-4 Model 3-03700 3-03880 3-03880 3-03880 3-03880 3-03700 03700- 4-04620 -04620 -04280 -04620 -001A -009A -001A 001A

STD

AL-2516

Model

Tipper Type

ASHOK LEYLAND

Make

TIPPER MODELS, CYLINDERS & APPLICATION

29

CYLINDER REPAIR INSTRUCTIONS FC & FE CYLINDERS REPAIRS INSTRUCTIONS Introduction Hyva cylinders contain a small number of components, which are subject to wear. Therefore it is sometimes necessary to dismantle the cylinder and replace the worn out parts like seal kit. Depending on the load requirements, either of the following types of cylinders are incorporated in system : 1) FE/ FC110 2) FE/FC129 3) FE/ FC 149 4) FE/ FC 169 5) FE/FC191 Repair of Hyva cylinder repairs should be carried out always in accordance with instructions given as below. 1. Before dismantling any Hyva cylinders always check the name plate for type of Cylinder, which is primary requirement in ordering right parts. 2. Remove the Cylinder from the chassis prior to dismantling and always place it horizontally on a clean and dust free place. Only in case of FC type of cylinder it is possible to leave the outer cover attached to the body. FC TYPE CYLINDER DISMANTLING Procedure : l Remove the top nut from the cylinder. l Raise the tipping body using the Hydraulic System until the first stage is visible. l Support the tipper body securely by use of a body prop. l Place the lever of the air control valve in the lowering position and allow the inners to sink to then rest position. Secure the cylinder, using a proper rope or sling to a suitable lifting device to prevent the cylinder from tipping over. l Disconnect one of the trunion brackets from the cradle or sub frame and ease the cylinder from the other bracket. The cylinder can now be laid on a bench ready for dismantling. l Lay the cylinder flat on a clean bench with the oil inlet facing downwards and clamp securely to avoid any kind of damage and injuries. A ‘V’ block arrangement is usually the best. Collect the waste oil. 30

CYLINDER REPAIR INSTRUCTIONS l

l

Use a ring Spanner to unscrew the Bolts of the bottom plate and remove the locking plates (Fig. 1 & 2) Place a filter ring in the groove left vacant by the locking plates, to ease the removal of the Bottom Plate. The Bottom plate can now be removed using either of the following methods. Figure. 1

Figure. 2

l

Using two small bolts inserted into the bottom plate lever it out of the base tube. (Fig. 3)

Figure. 3 31

CYLINDER REPAIR INSTRUCTIONS l

Strike the head of the piston with a mallet or mandrel. This forces the Bottom Plate out of the Base Tube. (Fig 4)

Figure. 4

l

When the Bottom Plate is free then remove its O-ring. (Fig. 5)

Figure. 5

l

Push the piston forward until the snap ring or lift rings with spacing ring are visible on the internal diameter of the next inner, (Fig. 6).

Figure. 6 32

CYLINDER REPAIR INSTRUCTIONS l

The snap ring can be removed using screw driver, the lift rings can be removed using a set of pliers. (Fig. 7).

l

The piston can now be removed through the bottom of the cylinder. The sliders on the piston, which have a diameter less than or equal to 99 mm, consist of two parts and these must be collected to prevent damage. Pistons with diameter greater than 99 mm container sliders, consisting of one part, which do not need to be removed (Fig. 8) The snap ring or lift rings of the subsequent inner must be removed before removing next inner stage through the bottom of the cylinder. Push the inner stage forward until the snap ring or lift rings with spacer in the subsequent inner is exposed. Remove the snap ring or the lift rings as described. The removed inner stage must be placed on is clean surface in order to prevent scratches and other damage (Fig. 9).

l

l

Figure. 7

Figure. 8

Figure. 9 33

CYLINDER REPAIR INSTRUCTIONS l

l

l

All the subsequent inner stages can be removed in this way. The seals and wipers must not be reused. (Fig. 10 & 11) Remove the seal, scraper and wear rings from the internal grooves at the top of each inner stage. Do not remove the seals and wipers with a screwdriver or other sharp instruments as this may damage the grooves irreparably and lead inevitably to leaks. The wear rings can be removed using a screwdriver. Never remove a Stop ring if it shows signs of damage. In that case the whole stage must be replaced. Clean each stage carefully and check each groove and the surface of the tube for any irregularities. Check also the slider on each tube. If these are damaged, they should be replaced. In this case, it is necessary to check the stop ring in the subsequent tube for signs of damage or twisting.

Figure. 10

Figure. 11

Figure. 12 34

CYLINDER REPAIR INSTRUCTIONS FE TYPE CYLINDER DISMANTLING Procedure: l Secure the cylinder, using a proper rope or sling to suitable lifting device to prevent the cylinder from tipping over. l Remove the split pin out of the pivot pin and tap the pivot pin out of the piston eye. l Disconnect one of the trunion brackets from the other bracket. The cylinder can now be laid on a bench ready for dismantling. l To remove the piston, push it forwards until the snap ring or lift rings with spacer in the next inner stage are exposed. The snap ring can be removed using a screwdriver; the lift rings can be removed using a pair of pliers. (Fig. 12) l Push the piston downwards and remove the sliders. In case of pistons and tubes with diameter 99 mm or smaller, the sliders consist of two parts which have to be collected up to prevent damage. (Fig. 13 & 14) l Never remove the pistons through the top of the cylinder without use of the filler rings in the slider groove. l Place a filler ring in the slider groove of the piston and lubricate it with the grease for

Figure. 13

Figure. 14

l

l

the packing set. The piston can now be removed through the top of the cylinder. Piston with a larger diameter than 99 mm can be removed through the bottom of the cylinder. In case of pistons and tubes with a larger diameter than 99 mm, the slider consist of one part which does not need to be removed.

35

CYLINDER REPAIR INSTRUCTIONS ALL TYPES OF CYLINDER ASSEMBLING General Procedure : l Clean each inner part thoroughly and apply sufficient grease to the pack-set and the grooves. Use new pack-set to each stage. Mounting should start with the seal, followed by the wear rings and the wiper. Always ensure that each of the ring is seated correctly in the groove. Incorrect fitting can lead to leakage of oil and damage to seals. (Fig. 1, 2, 3, 4, 5)

Figure. 2

Figure. 3

Figure. 1 36

Figure. 4

CYLINDER REPAIR INSTRUCTIONS l

l

Slide the first outgoing inner stage almost fully into the base tube ensure that scraping over the stop ring does not damage the tube. Some resistance will occur when passing through the pack-set (Fig. 6 & 7) To prevent damage and facilitate assembly, Hyva has developed special cones. Figure. 6

l

Place the sliders at the end of the inner stage and use sufficient grease. (Fig. 8)

Figure. 7

Figure. 5

Figure. 8 37

CYLINDER REPAIR INSTRUCTIONS l

l

l

l

l

l

l

The sliders must be mounted in a particular position with flat side of top slider always facing upwards. Slide the tube further home until the sliders are in the basic tube. Each of the subsequent inner Stages can be mounted similarly. After mounting an inner stage the snap ring of lift Rings with spacer should be placed. In the previous inner stage with the exception of the cylinder base. Mounting the position is carried out in the reverse sequence of dismantling. Fit a new ‘O’ ring to the bottom plate and slide the bottom plate into the base. Use sufficient grease and the fitter ring to prevent damage to the seal. (Fig. 9,10&11) Due to the special design of the cylinder, it is not necessary to bleed the air following assembly; the air is automatically discharged after the first few tipping operations. After testing for correct functioning of the cylinder, it can be re-fitted to the chassis. Follow the mounting instructions for FC/FE cylinder. The top nut on the outer casing must not be re-used.

Figure. 9

Figure. 10

Figure. 11 38

CYLINDER REPAIR INSTRUCTIONS FE TYPE CYLINDER (WITH SCREW EYE) ASSEMBLING Procedure : l Fit a new “Q” ring the piston eye, apply sufficient grease and screw the eye onto the piston. Applying grease to the screw thread can ease fitting the eye onto the Piston. l The locking rivet should be placed or the same height but not in the same existing hole. l Drill a new hole (5.8 mm & 18 mm deep) and hammer the rivet into the hole.

39

HYFIX BODY CLAMPS This is a unique feature of hyva tipping system. l

Hyfix clamp mounted underneath the body, stops rattling of the empty tipper body on the chassis and thus prevents damage to the chassis, structural part and sub-frame and reduced the noise nuisance.

l

This hyfix clamp is a revolutionary solution for continuous tipper problem of chassis receiving enormous hammering from the tipper body caused by potholes and bumps on the road.

l

Hyfix ensures a fixed connection between tipper body chassis. The continuous bolt and nut, depending on where hyfix is fitted and the dimensions of the tipper body can adjust the compression load in the power block. The compression load can vary from 250 to 1600 kgs.

WELDING OF THE HYFIX l The hyfix to be fully supported and welded over the entire surface before the compresson load is set, so that no bending moment will arise on the power block and locking. l

40

Also the Hyfix bracket has to be fully welded.

DISMANTLING THE HYFIX l Open the Hyfix with hollow steel bar and remover the setting pin. l While setting pin is removed and the Hyfix closes, there is a possibility of clamping between l The power block and the hook. l Greasing points should be properly greased at regular intervals. l Condition of power block and compression rod must be checked twice a year.

HOSES AND ADAPTERS SECTION & HIGH PRESSURE HOSES Make sure the proper hose orientation in order to ensure (a) Same is not getting rubbed with any object (b) there is no twist (c) Hose is not bent too sharply. l

The mounting torque of the hose clamp must be 6 NM

l

Take care the hoses do not come in contact with hot or moving parts like the exhaust or drive shaft.

l

Use Nylon Tape to seal the threads of elbows and hose pillars without O-ring, do not use Nylon Tape in combination with elbows or hose pillars with O-ring

Please use Hyva hoses only for replacement whenever required in order to ensure longer and safe life of hydraulic components.

41

HOSE ORIENTATION

42

FAULT DIAGNOSIS

Fault

Possible Causes

Remedy / Check

l The cylinder does

l The PTO IS not engaged

l

Move Cab Control to “in mesh” position

l

Pump does not deliver oil

l

Disconnect hose at ‘P’ and check if oil circulates

l

No oil in tank

l

Fill the oil tank

l

Gate valve closed

l

Open the gate valve

l

Insufficient air pressure

l

Check air supply

l

Cylinder is connected to wrong Valve port

l

Connect cylinder to port ‘A’

l

Air Control fault

l

Remove all air tubes except feed and exhaust. Check if air passes through relevant port when control move on to correct position. Replace this Valve if faulty

l

Air Tube ‘kinked’ or restricted

l

Check all Tubes for sharp bends. Disconnect both air tubes from valve and check air flow with air control in relevant position. If no air escapes from air tube ends, replace tubes

l

Lowering speed adjusting screw turned in completely (PT valve only)

l

Turn the screw anticlockwise

l

Knock-off valve does not work properly (if provided)

l

Check through the separate

l

instructions for knock-off valves

not mend when the air control is in tipping position

l

l

Air supply correct but tipping valve does not get actuated.

Cylinder raises but not lower or lowers too slowly

l

Air Control fails

l

Check air supply in lowering position

l

Return filter is chocked

l

Replace filter element

l

Grade of oil being used too heavy

l

Refill with proper grade of oil (see recommended list)

l

Cylinder drops when clutch is depressed

l

Non return valve in port ‘P’ not fitting

l

Replace tipping valve

l

Air supply is sufficient but tipping valve will not work

l

Internal leak in tipping

l

Change tipping valve

43

FAULT DIAGNOSIS

Fault

Possible Causes

Remedy / Check

Broken air tube l Plunged blocked by dirt

l

Valve works properly but suddenly fails

l

l

Cylinder jerks when extending

l

Air in the system

l

Bleed the pump by slightly opening the adapters from the pressure hose

l

Cylinder raises very slowly

l

Pump defective Too low air pressure

l

Replace pump Check air pressure, check air control, air tubes and tipping valve as described before

Cylinder does not extend fully

l

Relief valve is opening, by returning the oil tank, caused by too much load or all the load too far forward in the body

l

l

Oil level in tank too low

l

l

l

l

l

Replace the O-ring seal Check air tubes and replace as required

Check the pressure at which the relief valve is opening by connecting a pressure gauge to the serial port. If this pressure is not being obtained then contact Hyva authorised service centre l Top up the tank

l

Body comes down too fast

l

The lowering speed adjuster screw is worn out

l

Extended the cylinder fully, Put cab control in ‘HOLD’ position. Adjust the screw in position as far as possible. Move cab control to ‘LOWER’; unscrew the adjuster until the body descends at correct speed.

l

Valve selector shaft does not move even with sufficient air pressure

l

The selector shaft is sticking or stopped

l

Loose three fixing bolts by half a turn and try to switch the valve again. The torque of the bolts should not exceed 15 NM’.

l

Cylinder does not extend smoothly

l

Air in the system

l

Bleed the system, check oil level in tank

l

Pump is performing irregularly

l

Replace pump

l

Check for increase in system pressure

l

Clean the filter cartridge

l

Check relief valve cartridge for dirt or free

l

Replace the cartridge if necessary.

l

44

Excessive oil temp. (> 60OC)

GREASING LAYOUT

45

GREASING POINTS 1 Cylinder Mounting Bracket Greasing - Weekly

2 Piston Eye Greasing - Weekly

3 Rear Hinge greasing - 2 Points - Weekly (Mining Trucks-Daily)

4 Tail Door Locking Mechanism greasing - 3 Points. Weekly

46

GREASING POINTS 5 Tail Door Hinge - 2 Points Weekly

6 Body Prop - Weekly

7 Hyfix Assy. Greasing - 1 point - Weekly

8 Stabiliser Assy. Greasing - 6. Points - Weekly (All Rock Bodies on Mining Trucks)

47

SPECIFIC DENSITIES APRROX. SPECIFIC DENSITIES Material

Kg / Cu. M.

Material

Kg/Cu. M.

Ashes and cinders (wet)

1015-1330

Gravel and sand (dry)

1460-1728

Ashes and cinders (dry)

780-1030

Lime paste

1150-2000

Asphalt (pitch)

2128

Lime Powder

500

Asphalt (massive)

2394

Limestone burnt

775-1000

Marl

2300-2600 1446-1596

Asphalt (tar)

1878-2510

Barley in bulk

1729-1928

Molding sand

Bone meal

700-1100

Oats

415-515

Brick (loose)

1263-1662

Ore

2095-2560

Brick (stacked)

1480-1995

Potatoes

650-700

Brick (general)

630

Pebbles

1350-2000

Cement (loose)

1446

Rubble (broken stone)

1530-1730

Cement (natural)

897

Sand (wet)

1660

Clay (wet)

1760

Sand (dry)

1330

Clay (dy)

1015

Slag and cinders

Coal (anthracite)

897

Snow

Coke Grit

400-548

Stone (broken, coarse)

Coke

360-615

Stone (broken, fine)

1263-1660 80-800 1662 1197-1462

Concrete (wet)

2377

Stone (Grinded)

1600

Concrete (dry)

1240

Sugar in bulk

Corn and rye

765

Sulpher

1930-2070

Super phospate

1000-1200

797-880

Earth (wet)

1600-1800

Earth (dry)

1200

Town refuse

498

Fertilizer

1030

Wheat

765

Flour of corn

400-500

Wood chips

200

Flour

600-731

Wooden logs deal

320

Garbage

680

Wooden logs oak

420

Gravel

1680

Wooden logs beech

400

Gravel and sand (wet)

1928

Woodwool

50

48

TIPPING ANGLE Minimum required angle of tip : Material

Kg / Cu. M.

Material

Kg/Cu. M.

Ashes, dry

33

Earth, loose

28

Ashes, damp

36

Gravel

40

Ashes, wet

30

Ore, fine

37

Asphalt

45

Ore, dry

30

Brick

40

Pebbles

40

Cinders, dry

33

Refuse

30

Cinders, wet

31

Rubbish, broken stone

45

Cinders and clay

30

Sand, dry

35

Coal

30

Sand, damp

40

Coke

23

Stone, grinded

30

Compost

50

Stone, broken

27

Concrete

30

49

50

Tipping

1

Cylinder

Component Description

Sr. #

Cylinder Scoring

Cylinder Bulge

Cylinder bent

Type of failure Warranty N.A. Warranty N.A. Warranty N.A. Warranty N.A. Warranty applicable Warranty applicable Warranty N.A. Warranty N.A. Warranty applicable Warranty N.A. Warranty applicable Warranty N.A.

Vehicle toppling in an accident

Tipping Valve set pressure is tampered .

Pressure relief valve is malfunctioning.

Sticky spool of tipping valve.

Lowering operation is too fast.

Choked filter

Scoring on stages due to slider chip off.

Scoring in the axis of trunion due to side load .

Scoring due to stop ring dislocation and groove deformation.

Welding spatter and spark jumping due to earthing through cylinder.

l

l

l

l

l

l

l

l

l

l

l

Running of vehicle by keeping body in tipping condition

Action

Tipping on uneven ground.

l

Reason

WARRANTY GUIDELINES

Provided correct grade of oil is used &Maintenance schedules are followed.

If maintenance schedules are followed and correct grade of oil is used.

If Maintenance schedules are followed

If Maintenance schedules are followed.

Remarks

Warranty N.A. = Warranty Not applicable

51

·

·

Sr. #

Component Description

Cylinder Stuck

Cylinder base tube crack

Piston Eye coming out

Piston coming out

Oil leakage from cylinder bottom plate

Oil leakages from stages

Type of failure

l

l

·

l

·

l

Sliders over riding

Crack is on all around trunion.

Crack is on trunion side due to side loads.

Poor locking arrangement

·l Jerky operation by pushing backward after unloading.

·

Wrong fitment of seal

Warranty applicable

Warranty applicable

Warranty N.A.

Warranty applicable

Warranty N.A.

Warranty applicable Warranty applicable

Welding spatter on seal running area.

Poor quality seal

Warranty N.A. Warranty N.A.

Contaminated oil.

l

Warranty N.A.

High Oil temperature due to continuous PTO engagement.

l

l

l

l

Warranty N.A. Warranty N.A.

l

High Oil Temperature due to more number of tippings.

Body extension

l

Operational abuse

Warranty N.A. Warranty N.A.

Excess Load

l

l

Warranty applicable

Wrong fitment of seal

Action

l

Reason

WARRANTY GUIDELINES (Contd..)

Unauthorized body extension will waive-off all types of warranty claims.

Remarks

Warranty N.A. = Warranty Not applicable

52

Component Description

Tipping Valve

Hydraulic pump

Sr. #

2

3

Pump drive shaft broken

Pump leakage

Pump fails

Working pressure is too low.

High operating pressure.

Malfunctioning of valve

Oil leakage

Type of failure

Warranty N.A. Warranty applicable

Sticky spool

Pressure relief valve tampered.

Low system pressure as relief valve mal functioning

Warranty N.A. Warranty N.A. Warranty N.A. Warranty N.A. Warranty N.A.

No hydraulic oil in the tank

Pump operated without opening ball valve.

External damage due to hit by external object.

Correct grade of oil is not used .

Thrust plate & housing wear out due to excess raving of engine rpm.

Warranty N.A. Warranty N.A. Warranty applicable Warranty N.A. Warranty N.A.

Pump reversing procedure not followed

Oil contamination levels are high

Manufacturing defect

System pressure relief is tampered.

Entry of foreign particles.

l

l

l

l

l

l

l

l

l

Relief valve set pressure is tampered. Warranty N.A.

l

·

Warranty applicable Warranty applicable

Seal failure due to wrong fitment.

Action

l

l

l

l

l

Reason

WARRANTY GUIDELINES

Provided maintenance schedules are followed.

Remarks

Warranty N.A. = Warranty Not applicable

53

Hydraulic

5

Note:

Tipper sub-frame

4

Oil leakage

Sub frame · twisted

Sub frame crack

Thrust plate & wear out

Type of failure

Warranty applicable Warranty N.A. Warranty N.A.

Twisting due to wrong fitment

·External damage due to rubbing / hitting

l

l

l

Twist is due to accident

Warranty applicable

Warranty N.A.

Cracks due to accident to vehicle

Burst age of hose.

Warranty N.A.

Crack develops near welding joints under normal working conditions.

Leakage from crimping

Warranty N.A. Warranty N.A.

Crack due to improper loading pattern.

Warranty N.A.

Crack develop due to not tightening mounting bolts.

Action

l

l

l

l

l

l

Reason

Warranty is not applicable under following conditions. 1. Wrong application / usage of tipper. 2. Unauthorized body extension. 3. Abusive operating practices. 4. Not following recommended maintenance schedules .

Hoses

Component Description

Sr. #

WARRANTY GUIDELINES (Contd..) Remarks

Warranty N.A. = Warranty Not applicable

54

Date

Record of Service / Repairs performed Particulars of Repair

Hyva authorised Representative Sign.

55

Date

Record of Service / Repairs performed Particulars of Repair

Hyva authorised Representative Sign.

VEHICLE PARTICULARS

Model ....................................................................................................................................... Chassis No. .............................................................................................................................. Body Type .............................................................................................................................. Body Sr. No. ............................................................................................................................ Date of sale ............................................................................................................................ Owner’s name ....................................................................................................................... Address .................................................................................................................................... .................................................................................................................................................... ....................................................................................................................................................

56