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

8-47

Disassembly and Assembly

8.12.2 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 6-46.

8-48

Disassembly and Assembly

8.13 Swing Motor and Swing Drive AS - Disassemble and Assemble

8.13.1 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: 70 kg

3. No.1 sun gear

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

ZX215-1006072

ZX225-1006077

8-49

Disassembly and Assembly

4. No.1 planetary carrier assembly

1) Remove No.1 carrier assembly (3) and

the plate (4).

2) Disassemble the carrier assembly.

Cut the rivets on the shaft (8) to re-
move the shaft (8), and remove in turn
the gear (6), bearing (9) and plate (7).

5. Ring gear

Unscrew the mounting bolts to remove the
ring gear (10).

ZX215-1006073

ZX215-1006074

ZX215-1006075

8-50

Disassembly and Assembly

6. No. 2 sun gear

Remove No. 2 sun gear (11).

7. No.2 planetary carrier assembly

1) Remove No.2 carrier assembly (12).

2) Disassemble No. 2 carrier assembly as

per the following procedure.

ZX215-1006076

ZX215-1006077

8-51

Disassembly and Assembly

3) Insert pin (13) and push the shaft (14)

out of the carrier assembly (19).

NOTE: Pull out the pin (13) after re-
moval of the shaft.

4) Remove the thrust washer (16), gear

(17) and a second thrust washer (19).

5) Insert the pin (15) to remove the bear-

ing (18) from the shaft. Remove the pin
(15).

8. Snap ring

Remove the snap ring (20).

9. Disassembly of main shaft

1) Place the shaft housing assembly on a

press and push the shaft assembly (21)
out of the shaft housing assembly (22).

ZX215-1006078

ZX215-1006079

ZX215-1006080

Press

8-52

Disassembly and Assembly

2) Disassemble the shaft assembly in the

following procedure.

Remove the bearing (23) from the shaft
(24).

10. Bearing

Remove the bearing (25) and the oil seal
(26) from the housing (27).

ZX215-1006081

Press

ZX215-1006082

8-53

Disassembly and Assembly

8.13.2 Assembly

NOTE: Clean all the parts and check for any
contamination or damage. Apply engine oil to
the sliding surface of the parts.

1. Bearing

Press the bearing (23) into the housing
(27).

2. Oil seal

Press the oil seal (26) into the housing (27).

Oil seal installation surface:

Gasket sealant (Loctite 515)

3. Housing assembly

1) Position the plate (28) on the shaft (24).

2) Position the housing assembly (22) on

the shaft (24). Press in the bearing.

ZX215-1006083

ZX215-1006084

ZX215-1006085

8-54

Disassembly and Assembly

4. Bearing

Press in the bearing (25).

●

When press fitting the bearing, press
the bearing inner race and outer race
simultaneously. Never press only the
inner race.

●

After assembling the bearing, check if
the housing rotates freely.

5. No. 2 Planetary carrier assembly

1) Reassemble No. 2 carrier assembly ac-

cording to the following procedure.

2) Assemble the plate (16) in the carrier

assembly (19).

3) Assemble the gear (17) in the carrier

assembly (19). Put the bearing (18)
on the shaft (14). Slightly tap the pin
(15) into the bore after alignment. Use
a rubber hammer to tap the pin. Make
sure that the pin (15) must not higher
than the bearing (18).

4) Push the shaft assembly into the car-

rier assembly (19). Be careful not to
damage the gear and the plate. Align
the pin bore of the shaft with that of
the carrier assembly, and install the pin
(13). Carefully tap the pin with a rubber
hammer during installation.

NOTE: Installation of the shaft requires
rotating the planetary gear. Be careful not
to damage the thrust washer.

ZX215-1006086

ZX215-1006078

8-55

Disassembly and Assembly

6. Assemble in turn the snap ring (20),

No.2 carrier assembly and No.2 sun
gear (11).

7. Installation of ring gear

Apply sealant on the mating surface
indicated by (C) and tighten it with screws.
Never get the sealant onto the ring gear
(10).

Mating surface:

Sealant (Loctite 515)

8. No. 1 planetary carrier assembly

1) No. 1 carrier assembly is assembled as

per the following procedure.

2) Install the plate (7) into the carrier as-

sembly (5).

3) Install the gear (6) onto the plate after

installing the bearing (9) into the gear.

4) Press the shaft (8) into the gear (6) and

the carrier assembly (5). Rivet one end
of the shaft.

●

Check if the gear rotates freely.

ZX215-1006088

ZX215-1006087

No.2 planetary carrier

ZX215-1006074

8-56

Disassembly and Assembly

5) Install No. 1 carrier assembly (3) and

the plate (4).

9. No. 1 sun gear assembly

Install No. 1 sun gear (2).

ZX215-1006073

ZX215-1006072

Disassembly and Assembly

10. Installation of swing motor assembly

Apply sealant to the contact surfaces of the
ring gear and the motor cover, and install
the swing motor assembly.

Contact surface:

Sealant (Loctite 515)

Swing motor assembly: 55 kg

Mounting bolts (swing motor):

156±5 N·m {16±0.5 kg}

NOTE: The 14 bolt holes of the swing
motor and swing drive assembly are
distributed nonuniformly. The mating direc-
tion of each hole is

xed, as shown in the

illustration on the right. The installation of
swing motor requires proper alignment of
the bolt holes in order to ensure the instal-
lation orientation.

11. Lubricant adding

Screw on the drain plug and add lubricant
through the

ller to the speci

ed level (the

upper mark of oil stick).

Swing drive: approx. 4 L

ZX215-1006089

8-58

Disassembly and Assembly

8.14 Idler AS - Disassemble and Assemble

8.14.1 Disassembly

1. Remove the dowel pin (1) and the support

(2).

2. Remove the float seals (3) from the sup-

port (2) and the idler (4).

3. Remove the O-ring (11). Remove the idler

(4) from the shaft (5) and the support as-
sembly (7).

NOTE: The idler contains 80 ml oil, which
should be drained completely before disas-
sembling. Spread a cloth on the floor to
prevent smearing the

oor with oil.

4. Remove the float seals (6) on the other

side from the idler (4), shaft (5) and sup-
port assembly (7).

5. Remove the dowel pin (8) in order to re-

move the support (7) from the shaft (5).

6. Remove the bushings (9) and (10) from the

idler (4).

12 10

ZX215-1006090

ZX215-1006091

ZX215-1006092

910

8-59

Disassembly and Assembly

8.14.2 Assembly

1. Install the bushings (9) and (10) in the idler

(4).

2. Assemble the O-ring. Install the support (7)

to the shaft (5) with the dowel pin (8).

3. Install the float seals (6) to the idler (4),

shaft (5) and support (7) assembly.

●

Float seals

Completely remove the grease from the
contact surfaces (hatched area in the
illustration on the right) of O-ring and

oat seal before installing the

oat seal.

In addition, care must be taken to keep
the contact surface of float seal free
from dust.

ZX215-1006093

ZX215-1006094

ZX215-1006092

910

8-60

Disassembly and Assembly

●

After installation of the float seals,
check that the sealing inclination should
be less than 1 mm and the seal protru-
sion between 5 and 7 mm.

4. Install the shaft (5) and support (7) assem-

bly to the idler (4).

ZX215-1006095

ZX215-1006096

8-61

Disassembly and Assembly

5. Install the

oat seal (3) to the idler (4) and

support (2).

NOTE: Apply oil to the sliding surface of

oat seal. Care must be taken to keep the

sliding surface from any contaminants or
dust.

NOTE: Remove the oil and dust from the
contact surfaces of the O-ring and float
seal.

6. Install the O-ring. Install the support (2)

with the dowel pin (1).

7. Add oil and screw on the plug.

Oil: approx.

80 ml (No.18 hyperbola gear oil)

Plug:

205.8±49 N·m {21±5 kgf·m}

ZX215-1006097

ZX215-1006098

12 10

ZX215-1006090

8-62

Disassembly and Assembly

8.15

Sprocket - Remove and Install

8.15.1 Removal

1. Remove the track assembly.

Refer to “Track AS - Remove and Install”
on page 8-63.

2. Swing the work equipment 90°and lift the

chassis with the work equipment. Place a
block between the track frame and the
track shoe.

3. Remove the sprocket (1).

Sprocket: 58 kg

8.15.2 Installation

●

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

Threads (bolt - sprocket):

Thread sealant (Tonsan 1277)

Bolts (sprocket):

339±20 N·m {35±2 kgf·m}

ZX215-1006099

SANY Crawler Hydraulic Excavator SY195C9, SY205C9, SY215C9, SY225C9. Service Manual - page 34