7frames, wheels & working devices_englisg-g9165

Service Manual of RS8160 Road Roller

SERVICE MANUAL

7 Frames, Wheels & Working Devices

Service Manual for G9165 Grader

I

CONTENTS

7 Frames, Wheels & Working Devices .................................................................. 7-1

71 General ................................................................................................................. 7-1

711 Overview of Frames .................................................................................... 7-1

712 Overview of Working Devices .................................................................... 7-3

72 Disassembly and Assembly of Front Bulldozing Plate ....................................... 7-8

721 Disassembly of Front Bulldozing Plate ....................................................... 7-8

722 Assembly of Front Bulldozing Plate ........................................................... 7-9

73 Disassembly and Assembly of Frame Junction ................................................. 7-10

731 Disassembly of Upper Frame Junction ..................................................... 7-10

732 Disassembly of Lower Frame Junction ..................................................... 7-13

733 Assembly of Upper Frame Junction .......................................................... 7-14

734 Assembly of Lower Frame Junction ......................................................... 7-16

74 Disassembly and Assembly of Front and Rear Wheels .................................... 7-18

741 Disassembly of Rear Wheels ..................................................................... 7-18

742 Assembly of Rear Wheels ......................................................................... 7-19

743 Disassembly of Front Wheels .................................................................... 7-20

744 Assembly of Front Wheels ........................................................................ 7-22

75 Disassembly and Assembly of Middle Working Devices ................................. 7-23

751 Disassembly of Shovel Blades .................................................................. 7-23

752 Assembly of Shovel Blades ....................................................................... 7-26

753 Disassembly of Middle Scarifier ............................................................... 7-28

754 Assembly of Middle Scarifier ................................................................... 7-30

755 Disassembly of Rotary Gear Ring ............................................................. 7-31

756 Assembly of Rotary Gear Ring ................................................................. 7-36

76 Disassembly and Assembly of Middle Working Devices ................................. 7-42

761 Disassembly of Rear Scarifier ................................................................... 7-42

762 Assembly of Rear Scarifier ....................................................................... 7-45

77 Diagnosis and Elimination of Common faults .................................................. 7-46


7-1

7 Frames, Wheels &

Working Devices

71 General

711 Overview of Frames

1 2 3

Two kinds of frame are commonly used,

namely unitary frame and articulated frame.

Articulated frame consists of front frame, rear

frame and master pins.

G9165 has adopted articulated frame.

The front frame is mainly used to support the

working devices and cab.

The rear frame is installed with engine, torque

converter-transmission box assembly, fuel tank,

hydraulic oil tank and drive axle.

The front frame is installed on front frame, it

Fig. 7-1

1 Front frame

2 Master pin

3 Rear frame


7-2

can provide broad view for the operator, which

is beneficial for observing working state of the

shovel blades to improve the operation

accuracy. The master pin is used to connect

front frame and rear frame.

Front frame

The front frame is of box-type double-section

structure, it is welded together by four steel

plates. The front frame has advantages of good

manufacturability, integrated modular design,

and easy to be assembled with accessories like

front bulldozing plate and middle scarifier.

Rear frame

The rear frame is welded together by box-type

beams. It has advantages of integrated modular

design, high reliability and easy to be

assembled with accessory device like rear

scarifier. The accessory device is connected

with transmission system, so the impact load

only acts on the rear frame and will not affect

the transmission system.

Fig. 7-2

Fig. 7-3


7-3

712 Overview of Working Devices

Working device of G9165 grader have adopted

modular design, the basic model is free of

front counterweight and rear counterweight.

And accessories, such as front bulldozing plate,

middle scarifier and rear scarifier, can be

assembled easily and quickly according to

operational requirements.

Front bulldozing plate

The bulldozing plate is installed on front end

of the grader, it is mainly used for material

paving operations and trimming of road where

the shovel blades cannot reach.

If the bulldozing plate is not needed in the

operation, you can remove it, clean it and its

accessories thoroughly, coat the fitting surface

with grease and put it in dry room for storing

(or take moistureproof measures).

If the bulldozing plate is going to be stored for

long term, please coat the fitting surface with

grease and coat the other areas with paint.

Weight of the bulldozing plate: 1160kg

ATTENTION

During travel, the bulldozing plate should

be lifted up according to the road condition.

Middle scarifier

The middle scarifier is installed in the middle

area of G9165 grader. It is mainly used for

removing bulk rocks and stumps, it can also be

used to break the asphalt pavement.

Weight of the middle scarifier: 850kg

ATTENTION

Before starting the machine, lift the scarifier

1

Fig. 7-4

1 Front bulldozing plate

1

Fig. 7-5

1 Middle scarifier


7-4

up at first. Remove the scarifier if the

scarifier isn’t needed and store the teeth of

scarifier properly.

Shovel blades

The shovel blades are installed in the middle

area of G9165 grader, they are used to scrape

the soil and flatten the working plane.

The blade is driven by single oil cylinder,

over-positioning is avoided.

Radian of the blade is optimized to ensure

good trafficability and mobility and high

productivity.

Swing cylinder angle is small, thus the shovel

blade can move smoothly and flexibly when

changing the cutting angle.

Shovel blade ground clearance: 445mm

Shovel blade cutting depth: 787mm

Shovel blade tilt angle: 47° forward

5° backward

ATTENTION

During driving, the shovel blades should be

lifted up according to the road condition.

Up/down of shovel blade

Right and left lifting cylinder act on the ball

head on left and right side of connecting rack

respectively, by extending or retracting the

cylinder piston, the left and right side of

connecting rack can be lifted or lowered,

thereby height of the left and right blades can

be adjusted, which can make the height and

inclination of the ground meet the

requirements.

1 2

Fig. 7-7

1 Left blade lifting cylinder

2 Right blade lifting cylinder

1

Fig. 7-6

1 Shovel blade


7-5

Rotating of shovel blade

The horizontal deflection angle is the angle

between shovel blade body and longitudinal

axis of the grader in horizontal plane.

The rotary frame together with the blade body

can achieve 360° rotation in the horizontal

plane. A certain deflection angle exists

between blade and grader travel direction, so

that the scraped soil can be discharged from

the two sides and the grader can work

continuously.

Sidesway of shovel blade

The side protrusion length is the length of the

outside part of the side-extended shovel blade.

Blades can extend to both sides along the

length of the blade under the action of the

sidesway cylinder so as to increase the

operation width of grader.

Side-swing of shovel blade

When the blades are fully extended to both

sides and the operation width is still not

enough, you can side-swing the connecting

rack, rotary frame and the blades together left

and right to increase the operation range.

1

Fig. 7-8

1 Blade rotating cylinder

1

Fig. 7-9

1 Blade sidesway cylinder

1 2

Fig. 7-10

1 Locking cylinder

2 Side-swing cylinder


7-6

Side overturning of shovel blade

The side overturning angle is the inclined

angle of the side-overturned shovel blade in

the vertical plane.

Side overturning of shovel blade is used to

scrape side slope, under the joint action of left

and right lifting cylinders, the blades can edge

on left side and right side of grader and form a

certain angle to the ground, the maximum side

overturning angle of blade is 90°.

Adjusting of cutting angle

The cutting angle is the angle between the

shovel blade and the ground.

Under the action of blade tilt cylinder, the

blade body can tilt between forward 47° and

backward 5°, so as to get different cutting

angle of blade and to be used for different

working condition.

Rear scarifier

The rear scarifier is installed in the rear area of

G9165 grader. It is mainly used for removing

bulk rocks and stumps, it can also be used to

break the asphalt pavement to help the blades

to transfer the soil and material.

Weight of the rear scarifier: 1350kg

Rear scarifier is designed with five teeth,

generally three of them are used to operate on

hard ground. The teeth should be used

symmetrically, for example, use one middle

tooth or 2 outside teeth only, or use the three

teeth together.

Fig. 7-11

1

Fig. 7-12

1 Tilt cylinder

1

Fig. 7-13

1 Rear scarifier


7-7

Adjusting of rear scarifier

Running position: Retract the teeth and lift the

scarifier up completely;

Position for loosening soil: stretch the teeth out

and put them on the ground;

Cutting position: Use the cylinder to press

down the scarifier completely.

Loosening soil

Required number of teeth, cutting depth and

traveling speed depend on the hardness of the

ground.

Put the teeth of the scarifier on the ground;

Drive the grader forward, lower the scarifier to

insert the teeth into the earth.

ATTENTION

Before turning or reversing the machine, lift

the scarifier up at first. When parking the

machine, be sure to lower the scarifier to

the ground.

Remove the scarifier if the scarifier isn’t

needed and store it properly.

You should check whether the tooth handle

of the scarifier is damaged, cracked or

bended periodically. Do not use a faulty

tooth handle.

Front counterweight

The front bulldozing plate can be used as front

counterweight to balance the rear scarifier.

Weight of the front counterweight: 452kg

1

Fig. 7-14

1 Front counterweight


7-8

72 Disassembly and Assembly of

Front Bulldozing Plate

721 Disassembly of Front Bulldozing

Plate

1. Park the machine on solid and flat ground.

2. Put blocks under front and back of rear tires to

prevent the grader moving.

3. Use a copper bar to remove the connecting

pins of front bulldozing plate and the

connecting arm, and the connecting pins of

front bulldozing plate and the lifting support.

1

Fig. 7-15

1 Grader

1

Fig. 7-16

1 Wood block

1.

1 2 3

Fig. 7-17

1 Connecting pin 2 Connecting arm

3 Lifting support

2.


7-9

4. Use lifting rope to detach and lift the

bulldozing plate away and put it in suitable

place.

1160Kg

ATTENTION

Incorrect detaching method may result in

personal injury or damage the machine.

Be careful when detaching the bulldozing

plate, do not operate fiercely, and do not

bump against the fitting surfaces.

Rated hoisting weight of the lifting

appliance should be greater than the weight

of bulldozing plate. Nobody is allowed to

stand or walk under the lifted bulldozing

plate. Make sure is lifting rope is reliable

before lifting.

722 Assembly of Front Bulldozing

Plate

1. Prepare some lubricating oil and necessary

assembling tools, be well prepared.

2. Coat the connecting pins with lubricating oil,

lift the bulldozing plate and align the pin holes

for assembling.

3. Use copper bar to install the connecting pins.

1

Fig. 7-18

1 Bulldozing plate

3.

1 2

Fig. 7-19

1 Connecting arm

2 Lifting support

4.


7-10

4. Start the machine and check the function of

front bulldozing plate.


Frame Junction

731 Disassembly of Upper Frame

Junction

1. Park the machine on solid and flat ground.

2. Operate the control handles repeatedly to

unload the hydraulic system.

Fig. 7-20

5.

Fig. 7-21

Fig. 7-22


7-11

3. Turn off the battery power switch.



5. Remove the lock ring and fixing bolt of the

steering cylinder front connecting pin. Then

use a copper bar to remove the connecting pin.

1

Fig. 7-23

1 Power switch

1

Fig. 7-24

1 Wood block

6.

1 2

Fig. 7-25

1 Connecting pin

2 Steering cylinder

7.


7-12

6. Disconnect the rubber hoses from the valve,

and use protective caps to seal all the oil ports.

Make sure all other forms of connection are

disconnected before removing the master pin

of front frame and rear frame.

7. Place bracket under front and rear frames to

support them properly.

8. Remove the extraction pipe and oil cup.

9. Remove the fixing bolt of the upper master pin.

Take down the base plate.

1 2

Fig. 7-26

1 Front frame 2 Rear frame

8.

1

Fig. 7-27

1 Extraction pipe

9.

1

Fig. 7-28

1 Base plate

10.


7-13

10. Remove the fixing bolts of the upper locating

plate. Take down the plate.

11. Remove the spacer ring, take down the O-ring

and knock to remove the knuckle bearing.

732 Disassembly of Lower Frame

Junction

1. Remove the fixing bolt of the lower master pin.

Take down the base plate.

1 2 3

Fig. 7-29

1 Upper locating plate

2 Upper master pin

3 Knuckle bearing

11.

1

Fig. 7-30

1 Base plate

12.


7-14

2. Remove the lining, and take down the spacer

bush.

3. Remove the fixing bolts of the lower locating

plate. Take down the plate.

4. Remove the locating sleeve, take down the

O-ring and knock to remove the knuckle

bearing.

733 Assembly of Upper Frame

Junction

1. Clean the to-be assembled components and

parts thoroughly, make sure there is no

impurities, and no bump and scratch damage.

2. Clean up the master pin holes.

1 2 3

Fig. 7-31

1 Spacer bush

2 Lower master pin 3 Lining

13.

1

Fig. 7-32

1 Master pin hole

14.

Fig. 7-33

15.


7-15

3. Press-fit the spacer ring and O-ring, then

install the upper locating plate.

4. Tighten the fixing bolts of upper locating

plate.

5. Align the upper mater pin holes, lubricate the

pin holes and knuckle bearing hole with EP2

lubricating grease.

6. Press-fit the upper master pin, then install the

pin fixing bolt and base plate.

The bolt should be coated with thread locking

sealant.

Tightening torque: 339Nm

7. Install the extraction pipe and oil cup.

1 2 3

Fig. 7-34

1 Upper locating plate

2 Upper master pin

3 Knuckle bearing

16.

1 2

Fig. 7-35

1 Base plate 2 Bolt

17.

1

Fig. 7-36

1 Extraction pipe

18.


7-16

734 Assembly of Lower Frame

Junction

1. Press-fit the knuckle bearing, then install the

lower locating plate tighten the fixing bolts.

2. Align the lower mater pin holes.

3. Press-fit the lower master pin, then install the

spacer bush and lining.

4. Install base plate and tighten the pin fixing

bolt.

1 2

Fig. 7-37

1 Lower locating plate

2 Lining 3 Spacer bush

19.

1

1

Fig. 7-38

1 Base plate

20.


7-17

5. Install the extraction pipe and oil cup.

6. Connect the hydraulic pipes.

7. Install the steering cylinder front connecting

pin and nylon spacer.

8. Install the lock ring and fixing bolt of the

steering cylinder front connecting pin.

Lubricate the pin.

9. Check hydraulic oil level, add if insufficient.

10. Start the engine and check for oil leakage.

11. Turn the front frame to the extreme position,

and then deflate the hydraulic system.

12. Add grease to the knuckle bearings again.

1

Fig. 7-39

1 Extraction pipe

21.

1

Fig. 7-40

1 Hydraulic oil pipe

22.

1 2 3

Fig. 7-41

1 Connecting pin

2 Steering cylinder

3 Frame locking bar

23.


7-18


Front and Rear Wheels

741 Disassembly of Rear Wheels

1. Put the machine in maintenance position.

Refer to Page 10 in Safety & Environment.

2. Operate the control handle keep the shovel

blade close to the to-be removed wheel. Then

operate the blade lifting cylinder on the same

side to jack up the wheel.

3. Install tire forklift tools, and fix the wheel.

4. Use pneumatic impact wrench to remove

wheel nuts.

ATTENTION

Do not damage the thread when removing

the nuts. Tighten the wheel nuts crosswise

and diagonally when installing the wheel.

1

Fig. 7-42

1 Grader

1

Fig. 7-43

1 Wheel forklift tool

1

Fig. 7-44

1 Rear wheel


7-19

5. Remove the wheel and put it in suitable place.

742 Assembly of Rear Wheels

1. Clean up fitting surfaces between rim and hub.

Ensure the hub thread is clean and free of

damage.

2. Install the wheel.

Use tire forklift tools to place wheel in position.

Install four uniformly-spaced tire wheel nuts

diagonally and tighten them orderly.

ATTENTION

Tighten the nuts clockwise and evenly (take

several tightening steps to prevent tilting

the wheel).

1

Fig. 7-45

1 Bracket

1

Fig. 7-46

1 Hub

1

Fig. 7-47

1 Rear wheel


7-20

3. Remove tire forklift tool.

4. Install and tighten rest wheel nuts.

Tightening torque: 700~800Nm

5. Recover the machine.

6. Check the machine functions.

743 Disassembly of Front Wheels

1. Put the machine in maintenance position.

Refer to Page 10 in Safety & Environment.

2. Use the bulldozing plate to jack up the front

wheel.



1

Fig. 7-48


1

Fig. 7-49

1 Grader

1

Fig. 7-50

1 Wood block

24.


7-21

4. Install tire forklift tools, and fix the wheel.

5. Remove the wheel nuts and wheel.

ATTENTION

Do not damage the thread when removing

the nuts. Tighten the wheel nuts crosswise

and diagonally when installing the wheel.

6. Put the wheel in suitable place.

1

Fig. 7-51


1

Fig. 7-52

1 Hub

1

Fig. 7-53

1 Bracket


7-22

744 Assembly of Front Wheels

1. Clean up fitting surfaces between rim and hub.

Ensure the hub thread is clean and free of

damage.

2. Install the wheel.

Use tire forklift tools to place wheel in position.

Install four uniformly-spaced tire wheel nuts

diagonally and tighten them orderly.

ATTENTION

Tighten the nuts clockwise and evenly (take

several tightening steps to prevent tilting

the wheel).

3. Remove tire forklift tool.

4. Install and tighten rest wheel nuts.


5. Recover the machine.

6. Check the machine functions.

1

Fig. 7-55


1

Fig. 7-54

1 Hub


7-23


Middle Working Devices

751 Disassembly of Shovel Blades

1. Start the machine, drive it to flat, spacious and

solid ground, and stop the machine after

adjusting.


unload the hydraulic system. Then set all

control handles in neutral position and pull up

the parking brake handle.

3. Shut down the engine and put blocks under

front and back of the tires to prevent the grader

moving.

Fig. 7-57

1

Fig. 7-58

1 Wood block

25.

1

Fig. 7-56

1 Grader


7-24

4. Hang the shovel blade with lifting rope to

prevent it falling off and damaging your foot

or the ground after removing the connecting

pin.

5. Disconnect the oil pipes of blade sidesway

cylinder, use a container to collect the oil and

take measures to protect the exposed oil ports.

6. Use a copper bar to remove the connecting pin

of blade tilt cylinder, disconnect the cylinder

from shovel blade.

1

Fig. 7-59

1 Shovel blade

26.

1

Fig. 7-60

1 Blade sidesway cylinder

27.

1 2

Fig. 7-61

1 Blade tilt cylinder

2 Connecting pin

28.


7-25

7. Take down the connecting pin and protect the

cylinder from getting scratched.

8. Remove the fixing bolts of the locking block,

take down the block.

9. Remove the fixing bolts of the cover plate,

take down the plate.

1

Fig. 7-62

1 Connecting pin

29.

1

Fig. 7-63

1 Locking block

30.

1

Fig. 7-64

1 Cover plate

31.


7-26

10. Use a copper bar to remove the lining.

11. Lift the shovel blade away and put it in

suitable place.

752 Assembly of Shovel Blades

1. Clean up the rotary gear ring fitting areas and

inject some lubricating oil into the mounting

holes.

1

Fig. 7-65

1 Lining

32.

1

Fig. 7-66

1 Shovel blade

33.

1

Fig. 7-67

1 Rotary gear ring

34.


7-27

2. Coat the lining and wear-resisting plate with

lubricating oil.

3. Lift and connect the shovel blade to the rotary

gear ring.

4. Use a copper bar to install the lining. Fix the

cover plate on the lining with bolts and tighten

the bolts.

5. Install the fixing bolts of the locking block, fix

the lining.

1

Fig. 7-68

1 Lining

35.

1

Fig. 7-69

1 Lining

36.

1

Fig. 7-70

1 Locking block

37.


7-28

6. Use a copper bar to install the connecting pin

of blade tilt cylinder, to connect the cylinder

and shovel blade.

7. Use grease gun to inject some grease into the

pin joint.

8. Clean up the sdiesway cylinder pipe joints and

connect the oil pipes.

753 Disassembly of Middle Scarifier



adjusting.





3. Hang the middle scarifier with lifting rope to

prevent it falling off.

1 2

Fig. 7-71

1 Blade tilt cylinder

2 Connecting pin

38.

Fig. 7-73

1

Fig. 7-72

1 Grader


7-29

4. Screw off the connecting bolts and remove the

left and right welded pull rods.

5. Knock to remove the left and right welded

connecting pins, and remove the left and right

connecting arms.

6. Lift the middle scarifier away and put it in

suitable place.

ATTENTION



Be careful when detaching the middle

scarifier, do not operate fiercely, and do not

bump against the fitting surfaces.



of middle scarifier. Nobody is allowed to

stand or walk under the lifted middle

scarifier. Make sure is lifting rope is reliable

before lifting.

1

Fig. 7-74

1 Left welded pull rod

1 2

Fig. 7-75

1 Left connecting arm

2 Left welded connecting pin


7-30

754 Assembly of Middle Scarifier

1. Lift the middle scarifier to the right position

for assembling.

2. Install the left and right connecting arms, and

knock-in the welded connecting pins.

3. Install the left and right welded pull rods. And

tighten the connecting bolts.

4. Start the machine and check the functions.

1 2

Fig. 7-76

1 Welded connecting pin

2 Left connecting arm

1

Fig. 7-77

1 Left welded pull rod

1

Fig. 7-78

1 Middle scarifier


7-31

755 Disassembly of Rotary Gear Ring



adjusting.







moving.

Fig. 7-80

1

Fig. 7-81

1 Wood block

39.

1

Fig. 7-79

1 Grader


7-32

4. Hang the rotary gear ring with lifting rope to

prevent it falling off.

5. Remove the connecting bolts of clamping plate,

and take down the clamping plate and guide

plate.

6. Remove the three guide plates and clamping

plates orderly. Lift down the rotary gear ring.

1

Fig. 7-82

1 Rotary gear ring

40.

1 2

Fig. 7-83

1 Clamping plate 2 Guide plate

41.

1

Fig. 7-84

1 Rotary gear ring

42.


7-33

7. Disconnect the oil pipes and take measures to

protect the exposed pipe joints.

8. Hang the front end and rear end of the

connecting rack with lifting rope.

9. Remove the locking cylinder.

The locking cylinder is used to position the

swing frame. A rocker switch on the

instrument panel is used to lock/unlock it.

Operate the swing frame to the desired

position, when the lug is aligned to the one

of the indicating holes (the swing frame is

aligned to the connecting rod locating hole),

press the rocker switch at this point, the

swing frame will be locked, and the

indicator light on the instrument panel will

be on.

The position of swing frame is easy to

control in the cab by one man.

1

Fig. 7-85

1 Pipe joint

43.

1 2 3

Fig. 7-86

1 Rotary gear ring

2 Connecting rack 3 Ball head

44.

1 2

Fig. 7-87

1 Locking cylinder

2 Indicating hole

3 Position the swing frame

45.

2


7-34

10. Press the rocker switch

11. Remove the connecting bolts of left swing

cylinder.

12. Remove the connecting bolts of the right

swing cylinder. Take down the cylinder.

1

Fig. 7-88

1 Rocker switch for locking cylinder

46.

1 2

Fig. 7-89

1 Swing cylinder 2 Bolt

47.

Fig. 7-90

48.


7-35

13. Remove the bolts on both sides of the swing

frame. Take down the swing frame.

14. Loosen the connecting bolts of shovel blade

lifting cylinder piston rod, to disconnect the

connection between blade lifting cylinder and

connecting rack.

15. Remove the connecting bolts of the ball head

support and connecting rack.

1

Fig. 7-91

1 Swing frame

49.

1

Fig. 7-92

1 Shovel blade lifting cylinder piston

rod head

50.

1 2

Fig. 7-93

1 Ball head support

2 Connecting rack

51.


7-36

16. Lift the connecting rack away and put it in

suitable place.

756 Assembly of Rotary Gear Ring

1. Replace the wear-resisting plates with new

ones.

1

Fig. 7-94

1 Ball head support

52.

1

Fig. 7-95

1 Connecting rack

53.

1

Fig. 7-96

1 Wear-resisting plate


7-37

2. Hang the rotary gear ring with lifting rope and

place it on the connecting rack.

3. Tighten the connecting bolts of the clamping

plate and guide plate.

Loosen the back nut and fastening nut on

bottom of the clamping plate, change the

quantity of adjusting gaskets.

Use a feeler gauge to measure the axial

clearance between rotary frame and

wear-resisting nylon plate, which should be

within 1~2mm.

Tighten the back nut and fastening nut.

Tightening torque: 755±45Nm

4. Install the three guide plates and clamping

plates orderly.

Fig. 7-97

1

Fig. 7-98

1 Clamping plate

1

Fig. 7-99

1 Guide plate


7-38

5. Hang and turn over the connecting rack and

rotary gear ring assembly.

6. Align the bolt holes of connecting rack and

ball head support.

7. Install and tighten the connecting bolts.

1

Fig. 7-100

1 Connecting rack

1 2

Fig. 7-101

1 Connecting rack

2 Ball head support

1

Fig. 7-102

1 Connecting bolt


7-39

8. Install and rotary cylinders and connect the oil

pipes.

Installation method:

Keep the left rotary cylinder and the

actuating arm in the same line, the piston

rod of the rotary cylinder is retracted at

this point.

Keep the right rotary cylinder

perpendicular to the actuating arm, as

shown in Fig. 7-104.

Loosen the lock nut and oil pipe of rotary

valve, and rotate the valve element until

the small hole on the valve element is

aligned to the oil port. Then keep the

rotary valve element still and tighten the

lock nut.

1

Fig. 7-103

1 Rotary cylinder

Fig. 7-104


7-40

9. Install the swing frame and tighten the

fastening bolts.

10. Install the locking cylinder and connect the oil

pipes.

11. Install the swing cylinder, tighten the

fastening bolts and connect the oil pipes.

1

Fig. 7-105

1 Swing frame

54.

1

Fig. 7-106

1 Locking cylinder

55.

1

Fig. 7-107

1 Swing cylinder

56.


7-41

12. Install the left and right shovel blade lifting

cylinders and connect the oil pipes.


Check for oil leakage.

1

Fig. 7-108

1 Lifting cylinder

57.

Fig. 7-109

58.


7-42


Middle Working Devices

761 Disassembly of Rear Scarifier



adjusting. Lower the bulldozing plate to the

ground.

2. Operate the control handle to lower the rear

scarifier to the prepared backing plate.





Fig. 7-112

1

Fig. 7-110

1 Grader

1

Fig. 7-111

1 Rear scarifier


7-43



moving.

5. Use a copper bar to remove the connecting

pins. Remove the left and right connecting

boxes.

6. Disconnect the cylinder oil pipes, and take

measures to protect the exposed pipe joints.

Use a copper bar to remove the lower

connecting pins.

1

Fig. 7-113

1 Wood block

59. 1

60.

2 3

Fig. 7-114

1 Upper connecting pin

2 Left connecting box 3 Rear scarifier

61.

1 2

Fig. 7-115

1 Lower connecting pin

2 Connecting box

62.


7-44

7. Lift the rear scarifier away and put it in

suitable place.

8. The tooth sleeve is vulnerable part. When

disassembling it, you can use a copper bar to

knock one end of the steady pin to remove the

pin and elastic sleeve, and then take down the

tooth sleeve.

9. When assembling the sacrifice tooth, fit the

tooth and tooth sleeve first. The use a copper

bar to knock the steady pin and elastic sleeve

into the mounting hole.

ATTENTION



Be careful when detaching the scarifier, do

not operate fiercely, and do not bump

against the fitting surfaces.



of the scarifier. Nobody is allowed to stand

or walk under the lifted scarifier. Make

sure is lifting rope is reliable before lifting.

1

Fig. 7-116

1 Rear scarifier

63.

1 2 3 4

Fig. 7-117

1 Scarifier tooth 2 Elastic sleeve

3 Steady pin

4 Scarifier tooth sleeve

64.


7-45

762 Assembly of Rear Scarifier

1. Prepare some lubricating oil and necessary

assembling tools, be well prepared. Since the

scarifier needs to be assembled to the bottom

of the grader, a ditch nearby will be better.

2. Remove the left and right foot treadles. Install

the connecting bolts (with gaskets) back to

their original positions and tighten them.


3. Knock to assemble the pin to connect the oil

cylinder.

4. Use grease gun to inject some grease into the

pin joint.

5. Connect and fix the oil pipes, and install the

left and right connecting boxes.

6. Lift and assemble the rear scarifier, and install

the connecting pin.


1

Fig. 7-118

1 Foot treadle

Fig. 7-119

1

Fig. 7-120

1 Rear scarifier


7-46

77 Diagnosis and Elimination of Common faults

The quality of working devices directly affects working efficiency of the machine. Table 7-1

presents some common faults in daily operation.

Table 7-1

Fault phenomenon Possible causes Elimination methods

Self-motion of

shovel blade rotary

frame under load

Seal of rotary cylinder is damaged

and result in bypass of oil line Replace the seal

Wear of rotary valve group in

multitandem valve Replace the rotary valve group

Abnormal wear of rotary valve

element Replace the rotary valve

Oil pipe or pipe joint has leakage

problem Replace the pipe

Shovel blade rotary

frame cannot rotate

or cannot rotate

smoothly

Clamping stagnation of rotary

mechanism

Clean up the rotary mechanism and

adjust the rotary frame clearance

according to related requirements

Drive shaft of rotary valve is

damaged, gear of rotary valve is

damaged, sliding occurs between

drive shaft of rotary valve and gear

of rotary valve

Replace the drive shaft or gear

Rotary drive gear is damaged Replace the gear

Spline connection of rotary

actuating arm and rotary gear is

damaged

Replace the actuating arm or gear

The oil lines between rotary valve

and rotary cylinder is wrongly

connected

Adjust the position of rotary valve

element according to related

requirements

Low oil level in hydraulic oil tank Add oil to specified level

Seal of rotary cylinder is damaged Replace the seal

Set pressure of multitandem valve

is incorrect Reset

The multitandem valve cannot

maintain required pressure

Replace the safety valve of

multitandem valve

The wear-resisting nylon plate is

severely worn or with too small

clearance

Replace the wear-resisting nylon

plate or adjust the clearance

Turning direction of

shovel blade rotary

frame is not

inconsistent with

the indicated

direction of the

control handle

Position of rotary valve element is

wrong


element by rotating 180°


7-47

Shovel blade rotary

frame can only

rotate in one

direction

Position of rotary valve element is

wrong


element according to related

requirements

The shovel blade

vibrates during

working

Axial and radial clearance of rotary

frame is too large Adjust

The guide sleeve or lining of

shovel blade tilt cylinder support is

damaged

Replace the guide sleeve or lining

The wear-resisting nylon plate is

severely worn or broken

Replace the wear-resisting nylon

plate

Shovel blade tilt cylinder has

severe internal leakage problem Replace the cylinder seals

The working device

falling down

unexpectedly

Shovel blade lifting cylinder

balance valve is damaged or stuck,

and result in failure

Replace the balance valve

7frames, wheels & working devices_englisg-g9165

Documents

disassembly of rear

assembly of frame junction

disassembly of rear

disassembly of shovel

overview of working

devices service manual

overview of frames

kinds of frame