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SANY Crawler Hydraulic Excavator SY215CLC (CUMMINS QSB6.7 engine). Shop Manual - page 32

Disassembly and Assembly

SY215C

8-20

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

Disassembly and Assembly

SY215C

8-21

8.4.2 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 hydraulic
oil in the hydraulic system, and check the
oil level again.

●

Air bleeding

For more information, see “Air in Each
Component - Bleed” on page 6-35.

Disassembly and Assembly

SY215C

8-22

8.5 Final Drive AS - Remove and Install

8.5.1 Removal

1. Remove the sprocket. Refer to “Sprocket -

Remove and Install” on page 8-49.

Lower the work equipment to the ground.

Stop the engine. Operate the breather
valve to release internal pressure.

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

Disassembly and Assembly

SY215C

8-23

4. Remove the 30 mounting bolts from the

final drive assembly (3), and lift the as-
sembly for disassembling.

★

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

nal drive.

Final Drive Assembly: 250 kg

8.5.2 Installation

●

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

Mounting bolts (final drive assem-

bly):

245~309 N·m {25~31 kgf·m}

●

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 6-35.

ZX215-1006053

Disassembly and Assembly

SY215C

8-24

8.6 Final Drive AS - Disassemble and Assemble

8.6.1 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

①

to the

cover (1).

3. Spacer

Remove the spacer (2).

ZX215-1006054

ZX215-1006055

Disassembly and Assembly

SY215C

8-25

4. No. 1 planetary carrier assembly

1) Remove the No.1 planetary carrier as-

sembly (3).

2) Disassembly of No.1 planetary carrier

assembly.

i) Remove the screws (4). Remove

the coverplate (5) from the plan-
etary carrier assembly (6).

ii) 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

Disassembly and Assembly

SY215C

8-26

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

②

to remove the hub as-

sembly (24) from the travel motor.

ZX215-1006059

ZX215-1006060

ZX215-1006061

Disassembly and Assembly

SY215C

8-27

2) Disassemble the hub assembly as the

following.

i) Remove

the

oat seal (25).

ii) Remove the bearing (26) and bear-

ing (27) from the hub (28).

★

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

3) Remove the float seal (29) from the

travel motor.

ZX215-1006062

ZX215-1006063

Disassembly and Assembly

SY215C

8-28

8.6.2 Assembly

★

Clean all the parts. Check that these parts
are free from any contamination or dam-
age. Apply some engine oil to the sliding
surface 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

Disassembly and Assembly

SY215C

8-29

4) Use eyebolts

②

to carefully place the

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

t the bearing.

ZX215-1006061

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

Load 3000Kg

ZX215-1006066

Disassembly and Assembly

SY215C

8-30

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:

(Kesaixin 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

assembly

1) Assemble the No.2 planetary carrier

assembly according to the following
procedure.

★

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

i) Assemble the bearing (18) and

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

ii) Tighten the screw (15).

Screw (15):

539±28 N·m {55±2.9 kgf·m}

★

Check the

exibility of gear (17)

after assembling the planetary
carrier assembly.

Tensiometer

ZX215-1006067

ZX215-1006060

Disassembly and Assembly

SY215C

8-31

ZX215-1006059

6. No. 1 sun gear shaft

Install No.1 sun gear shaft (12).

4. Thrust washer

Install the thrust washer (13).

5. No.2 sun gear

Install No.2 sun gear (14).

ZX215-1006058

7. No.1 planetary carrier assembly

1) No. 1 planetary carrier assembly is as-

sembled as the following.

★

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

i) 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 carrier assembly (6).

ii) Fix the coverplate (5) to the carrier

assembly (6) with screw (4).

ZX215-1006057

Disassembly and Assembly

SY215C

8-32

ZX215-1006056

ZX215-1006055

Torque wrench

ZX215-1006068

2) Install No.1 planetary carrier assembly

(3).

8. Spacer

Install the spacer (2).

9. Cover

Use eyebolts

①

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.

Disassembly and Assembly

SY215C

8-33

8.7 Swing Motor and Swing Drive AS - Remove and Install

8.7.1 Removal

Release the residual pressure in the hy-

draulic circuit. Refer to “Residual Pres-
sure in Hydraulic Circuit - Release” on
page 6-29.

Lower the work equipment to the ground.

Stop the engine. Press the release button
of the breather valve to release residual
pressure in the hydraulic tank. Place the
hydraulic lockout control in the LOCK po-
sition.

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

1) Between hydraulic tank and swing mo-

tor (port DR)

2) Between central swivel joint and swing

motor (port DR)

3) Between swing motor and main valve

(port M)

4) Between swing motor and main valve

(port HA)

5) Between swing motor and main valve

(port HB)

6) Between swing motor and main valve

Px port (port SH)

7) Between swing motor and solenoid

valve block (port PG)

2. Remove the 11

xing bolts (8).

3. Lift the swing motor and swing drive

assembly (9) for disassembling.

★

Slowly lift the swing motor and swing
drive assembly in order to avoid dam-
aging the hoses and other parts.

Swing motor and swing drive

assembly: 260 kg

ZXT225-1106002

ZXT225-1106003

Disassembly and Assembly

SY215C

8-34

8.7.2 Installation

●

Installation is performed in the reverse or-
der of removal.

Mounting bolts (swing motor and

swing drive assembly):

490~608 N·m {50~62 kgf·m}

●

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 6-35.

Disassembly and Assembly

SY215C

8-35

8.8 Swing Motor and Swing Drive AS - Disassemble and Assemble

8.8.1 Disassembly

1. Draining of oil

Open the drain plug to drain the oil from
the swing drive.

Swing drive: approx. 4.4 L

2. Swing motor assembly

1) Place the swing motor and swing drive

assembly on a suitable cribbing. Be
careful not to damage the drive gear or
let it contact the ground.

2) Unscrew the 14 bolts in order to re-

move the swing motor assembly (1).

Swing motor assembly: 62 kg

3. No.1 sun gear

1) Remove No.1 sun gear (2).

ZX215-1006072

ZX225-1006077

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