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SANY Crawler Hydraulic Excavator SY195C9, SY205C9, SY215C9, SY225C9. Service Manual - page 33

8-31

Disassembly and Assembly

14. Disconnect the external cable (26) of the

rpm sensor.

15. Disconnect the external cable (27) of en-

gine oil pressure sensor.

16. Disconnect the engine oil inlet tube (28)

and outlet tube (29).

17. Disconnect the wiring (30) of the engine oil

pressure switch.

18. Disconnect the cables (31) and (32), and

remove the hose clamp (33).

ZX215T-1006043

ZX215T-1006044

ZX215T-1006045

8-32

Disassembly and Assembly

19. Remove the hose clamp (35).

20. Disconnect the wiring (34) of the water

temperature sensor.

21. Disconnect the cables (36) and (37) of the

water temperature switch.

22. Disconnect the oil return hose (38).

23. Disconnect the A/C water pipe (39).

ZX215T-1006046

ZX215T-1006047

ZX215T-1006048

8-33

Disassembly and Assembly

24. Disconnect the radiator fan guard (40).

25. Remove the

xing bolt (41) on each of the

four mounting plates of the damper. Lift the
engine and main pump assembly.

Engine and hydraulic pump AS:

640 kg

ZX215T-1006049

ZX215T-1006050

8-34

Disassembly and Assembly

8.9.2 Installation

●

Installation is to be performed in the re-
verse order of removal.

●

Open the radiator tank cover to add cool-
ant. Also add coolant to the coolant reser-
voir.

Engine coolant: approx. 22.5 L.

●

ll the hydraulic tank with hydraulic oil.

Hydraulic tank: approx. 225 L

●

Start the engine to circulate the coolant
in order release the foams, and check
the coolant level again.

●

Start the engine to circulate the hy-
draulic oil in the hydraulic system, and
check the oil level again.

●

Air bleeding

For more information, see “Air in Each
Component - Bleed” on page 6-46.

8-35

Disassembly and Assembly

8.10 Final Drive AS - Remove and Install

1. Remove the sprocket.

For more information, see “Sprocket -
Remove and Install” on page 8-62.

2. Remove the motor cover plate (1).

3. Disconnect the four hoses (2) of the travel

motor and the corresponding hose connec-
tors.

ZX215-1006051

ZX215T-1006052

8.10.1 Removal

CAUTION

●

L o w e r t h e w o r k e q u i p m e n t t o t h e
ground. Stop the engine. Operate the
breather valve to release internal pres-
sure.

8-36

Disassembly and Assembly

4. Remove the 30 mounting bolts from the

nal drive assembly (3), and lift the assem-

bly for disassembling.

8.10.2 Installation

●

Installation is to be performed in the re-
verse order of removal.

Mounting bolts (

nal drive assembly):

245~309 N·m {25~31 kgf·m}

ZX215-1006053

Final Drive Assembly: 250 kg

●

Hydraulic oil adding

Add hydraulic oil through the

ller opening

to the specified level. Start the engine to
circulate oil in the hydraulic system, and
check the oil level again.

●

Air bleeding

For more information, see “Air in Each
Component - Bleed” on page 6-46.

NOTICE

●

Be careful not to damage the surface
of mounting seal installed on the hose
base.

●

Never use the threaded holes to lift the
cover when lifting the fi nal drive.

8-37

Disassembly and Assembly

8.11 Final Drive AS - Disassemble and Assemble

8.11.1 Disassembly

1. Oil draining

Open the drain plug to drain the oil from
the

nal drive tank.

Final drive tank: approx. 4.7 L

2. Cover

Remove the bolts. Use eyebolts to the
cover (1).

3. Spacer

Remove the spacer (2).

ZX215-1006054

ZX215-1006055

8-38

Disassembly and Assembly

4. No. 1 planetary carrier assembly

1) Remove the No.1 planetary carrier as-

sembly (3).

2) Disassembly of No.1 planetary carrier

assembly.

3) Remove the screws (4). Remove the

coverplate (5) from the planetary carrier
assembly (6).

4) Remove the thrust washer (7), gear (8),

bearing (9), bearing inner race (10) and
a second thrust washer (11).

5. No.1 sun gear shaft

Remove No.1 sun gear shaft (12).

ZX215-1006056

ZX215-1006057

ZX215-1006058

8-39

Disassembly and Assembly

8. Disassembly of No.2 planetary carrier

assembly

1) Remove the screws (15). Remove the

plate (16) and the planetary gear (17)
from the carrier assembly (22).

2) Remove the bearing inner race (19)

and outer race (18). Remove the plate
(20).

3) Remove the screw (21) to take the

planetary carrier assembly (22) and the
shim (23) from the body.

6. Thrust washer

Remove the thrust washer (13).

7. No.2 sun gear

Remove No.2 sun gear (14).

9. Hub assembly

1) Use eyebolts to remove the hub as-

sembly (24) from the travel motor.

ZX215-1006059

ZX215-1006060

ZX215-1006061

8-40

Disassembly and Assembly

2) Disassemble the hub assembly as the

following.

3) Remove the

oat seal (25).

4) Remove the bearing (26) and bearing

(27) from the hub (28).

NOTE: Do not damage the bearing retainer
when removing the bearing (26).

5) Remove the float seal (29) from the

travel motor.

ZX215-1006062

ZX215-1006063

8-41

Disassembly and Assembly

8.11.2 Assembly

NOTE

: Clean all the parts. Check that these

parts are free from any contamination or dam-
age. Apply some engine oil to the sliding sur-
face prior to installation.

1. Hub assembly

1) Install the bearing 26 and bearing (27)

by pressing them onto the hub (28).

2) Install the

oat seal (25).

●

Remove any oil or dust from the O-ring
or O-ring contact surface. Dry the parts
before installing the

oat seal.

●

After installing the

oat seal, check that

the angle of the

oating seal is within 1

mm.

●

Apply a thin layer of engine oil to the
sliding surface after the float seal has
been installed.

3) Install the float seal (29) to the travel

motor (30).

●

See the above step 2 for the installation
procedure.

ZX215-1006062

ZX215-1006064

ZX215-1006063

8-42

Disassembly and Assembly

ZX215-1006061

4) Use eyebolts to carefully place the

hub assembly (24) onto the travel mo-
tor. Tap to press

t the bearing.

ZX215-1006066

Load 3000Kg

2. Calculation of shim thickness

1) Measure the thickness (H) of the raised

part of No.2 carrier assembly (22).

2) Measurement of raised thickness

Apply 3000 Kg load to the bearing and
measure the value (H) of the raised
part of the bearing.

●

Turn the hub 2-3 times before applying
a pushing force.

●

Do not use a spray gun to cushion the
bearing.

●

Do not push or strike the resin retainer.

3) Shim thickness calculation: C=H-h.

ZX215-1006065

8-43

Disassembly and Assembly

ZX215-1006067

Tensiometer

ZX215-1006060

4) Place the shims on the body and insert

the dowel pin. Press the carrier assem-
bly onto the dowel pin and tighten it
with screw (21). Apply locking adhesive
to the threads.

Screw-locking adhesive:

(Tonsan 1277)

Screw (21):

539±28 N·m {55±2.9 kgf·m}

●

Use a tensiometer to measure the tan-
gential force of hub to motor rotation.

Tangential force: Max.294 N {30 kg}

Maximum tangential force occurs when
the rotating direction begins to change.

3. Assembly of No.2 planetary carrier as-

sembly

1) Assemble the No.2 planetary carrier

assembly according to the following
procedure.

NOTE: Replace the plates (20) and (16)
with new parts.

2) Assemble the bearing (18) and bearing

(19) to the gear (17). Assemble the top
and bottom plates (16) and (20), and
place the gear assembly into the carrier
assembly (22).

3) Tighten the screw (15).

Screw (15):

539±28 N·m {55±2.9 kgf·m}

●

Check the flexibility of gear (17) after
assembling the planetary carrier as-
sembly.

8-44

Disassembly and Assembly

ZX215-1006059

ZX215-1006058

ZX215-1006057

4. Thrust washer

Install the thrust washer (13).

5. No.2 sun gear

Install No.2 sun gear (14).

6. No. 1 sun gear shaft

Install No.1 sun gear shaft (12).

7. No.1 planetary carrier assembly

1) No. 1 planetary carrier assembly is as-

sembled as the following.

NOTE: Replace the thrust washers (7)
and (11) with new parts.

2) Assemble the bearings (9) and (10)

onto the gear (8). Assemble the top
and bottom thrust washers (7) and (11).
Place the gear assembly into the car-
rier assembly (6).

3) Fix the coverplate (5) to the carrier as-

sembly (6) with screw (4).

8-45

Disassembly and Assembly

ZX215-1006056

ZX215-1006055

ZX215-1006068

Torque wrench

4) Install No.1 planetary carrier assembly

(3).

8. Spacer

Install the spacer (2).

9. Cover

Use eyebolts to assemble the cover (1).
Use a torque spanner to tighten the bolts.

Bolts:

73.4±3.63 N·m {7.5±0.4 kgf·m}

10. Oil adding

Tighten the drain plug and add engine oil
through the

ller.

Final drive case: approx. 4.7 L

●

Check the oil level after the

nal drive

has been successfully installed to the
chassis.

8-46

Disassembly and Assembly

8.12 Swing Motor and Swing Drive AS - Remove and Install

8.12.1 Removal

ZXT225-1106002

ZXT225-1106003

1. Disconnect the hoses (1) to (7).

●

Between hydraulic tank and swing motor
(port DR)

●

Between central swivel joint and swing mo-
tor (port DR)

●

Between swing motor and main valve (port
M)

●

Between swing motor and main valve (port
HA)

●

Between swing motor and main valve (port
HB)

●

Between swing motor and main valve Px
port (port SH)

●

Between swing motor and solenoid valve
block (port PG)

2. Remove the 11

xing bolts (8).

3. Lift the swing motor and swing drive as-

sembly (9) for disassembling.

NOTE: Slowly lift the swing motor and
swing drive assembly in order to avoid
damaging the hoses and other parts.

Swing motor and swing drive as-

sembly: 260 kg

Release the residual pressure in the hy-
draulic circuit. Refer to “Residual Pressure
in Hydraulic Circuit - Release” on page 6-40.

CAUTION

●

L o w e r t h e w o r k e q u i p m e n t t o t h e
ground. Stop the engine. Press the re-
lease button of the breather valve to re-
lease residual pressure in the hydraulic
tank. Place the hydraulic lockout con-
trol in the LOCK position.

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