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

Disassembly and Assembly

SY215C

8-52

★

Use the tool (M) to press the master pin.
Make sure that the protrusion of master pin
meets the size (a).

Master pin protrusion (a): 2.5±1 mm

★

Before installing the dust seal, apply
grease (No.2 lithium base) to its contact
surface with the bushing.

8.11.2 Installation

●

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

★

Refer to "Testing and Adjusting", "Track
Shoe Tension - Test and Adjust".

●

Installation procedure of track shoe bolts
and nuts

1) Bring the R side of the track shoe nut (1)

to the link seat surface. Both seat sur-
faces should be in close contact when
assembling the track shoe.

★

If the track shoe bolts are installed
from the other side, the corner of nut
will interfere with the link seat surface,
causing the nut to raise and the bolt to
loosen.

2) Tighten the bolts of track shoe to the

torque below.

Track shoe bolts:

750±30 N·m {77±3 kgf·m}

ZX215-1006103

Corner

Track shoe nut
(Square)

Seat surface
in close contact

ZX215-1006104

Disassembly and Assembly

SY215C

8-53

8.12 Swing Bearing AS - Remove and Install

8.12.1 Removal

1. Remove the swing platform assembly.

Refer to “Swing Platform AS - Remove and
Install” on page 8-55.

2. Dismount the 36 bolts (1) to remove the

swing bearing assembly.

3. Hoist the swing bearing assembly (2).

Swing bearing assembly: 314 kg

ZX215T-1006105

ZX215T-1006106

Disassembly and Assembly

SY215C

8-54

8.12.2 Installation

●

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

Threads (bolt - swing bearing):

Thread adhesive (Tonson 1277)

Mounting bolts (swing bearing):

Step 1:

Use a pneumatic spanner to tighten the
bolts.

Step 2:

Torque to: 549±59 N·m {56±6kgf·m}

1) When a torque spanner is used to

tighten the bolts, tighten first the four
corners and mark them.

2) Other bolts will be tightened clockwise

or counterclockwise. After one bolt is
tightened, tighten the next one on the
diagonal position and make a mark.

3) Tighten the rest bolts in this way.

★

Let the S mark in the soft zone of the
inner race of the inner ring face the
right side, as shown in the photo, and
install the swing bearing to the track
frame.

★

Apply grease to the inside of the gear
ring of the swing bearing.

●

All gear teeth must be covered by
grease .

Swing bearing:

Grease(supramoly lithium base):15 L

Inner race soft zone

ZX215T-1006107

Disassembly and Assembly

SY215C

8-55

8.13

Swing Platform AS - Remove and Install

8.13.1 Removal

Fully extend the arm and the bucket. Low-

er the work equipment to the ground and
move the hydraulic lockout control lever
to the LOCK position.

1. Disassemble the work equipment as-

sembly. Refer to “Work Equipment AS -
Remove and Install” on page 8-94.

2. Remove the counterweight assembly.

Refer to “Counterweight AS - Remove and
Install” on page 8-101.

3. Remove the four hoses (1) of boom

cylinder.

★

Cork the hoses to prevent

ow of oil.

4. Lift the boom cylinder assembly (2).

ZX215T-1006108

ZX215T-1006109

Disassembly and Assembly

SY215C

8-56

5. Remove the plate (3) and the pin (4). Lift

the boom cylinder assembly (2) in order to
remove it.

★

Remove the boom cylinder assembly
on the other side in the same way.

Boom cylinder AS: 230 kg

6. Remove the plate (5), air intake hose (6)

and fan guard (7).

★

Removal of the swing platform requires
removing other parts that interfere with
the lifting of swing platform.

ZX215T-1006110

ZX215T-1006111

Disassembly and Assembly

SY215C

8-57

7. Disconnect the six hoses above the

swivel joint assembly.

8) Central swivel joint (port A)-

Left travel control valve (port BTL)

9) Central swivel joint (port C)-

Left travel control valve (port ATL)

10) Central swivel joint (port F)-

Solenoid valve

11) Central swivel joint (port G)-

Swing motor (port T)

12) Central swivel joint (port D)-

Right travel control valve (port ATR)

13) Central swivel joint (port B)-

Right travel control valve (port BTR)

8. Remove the bolt (14).

9. Unscrew the 32 swing platform mounting

bolts in order to remove the swing platform
assembly (15). Lift the swing platform as-
sembly off the machine.

★

Remove the front and rear mounting
bolts of the platform. Use a lever block
to adjust the swing platform so that
the platform can reach a balance both
longitudinally and laterally. Remove the
last two bolts

nally.

Be careful not to impact the cen-

tral swivel joint while removing the
swing platform assembly.

Swing platform assembly:

ZX215T-1006112

ZX215T-1006113

Assembly

Swing Platform

Only (Ref.)

SY215C

8,427 kg

1,689 kg

Disassembly and Assembly

SY215C

8-58

8.13.2 Installation

●

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

Clamping screws (air intake hose):

5.4~6.4 N·m {0.55~0.65 kgf·m}

Mating surface (swing bearing):

Flat surface sealant (Tonson 1596)

Threads (bolt - swing platform):

Thread adhesive: (Tonson 1277)

Mounting bolts (swing platform):

Step 1: Tighten the bolts with a pneumatic

spanner.

Step 2: tighten them again.

490~608 N·m {50~62 kgf·m}

●

Hydraulic oil adding

Add through the

ller opening the hydraulic

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

●

Air bleeding

Bleed the air from the travel motor.

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

Disassembly and Assembly

SY215C

8-59

8.14 Swivel Joint AS - Remove and Install

8.14.1 Removal

Release residual pressure in the hydrau-

lic circuit. Refer to “Residual Pressure in
Hydraulic Circuit - Release” on page 6-29.

★

Tag each line so as to ensure correction
installation.

1. Disconnect the six hoses from (1) to (6) on

the central swivel joint of the travel motor.

(1): Central swivel joint (port T)-

Left travel motor (port T)

(2): Central swivel joint (port T)-

Right travel motor (port T)

(3): Central swivel joint (port B)-

Left travel motor (port PA)

(4): Central swivel joint (port D)-

Right travel motor (port PB)

(5): Central swivel joint (port A)-

Left travel motor (port PB)

(6): Central swivel joint (port C)-

Right travel motor (port PA)

2. Disconnect the eight hoses from (7) to

(14).

(7): Central swivel joint (port F)-

Left travel motor (port P)

(8): Central swivel joint (port F)-

Right travel motor (port P)

(9): Central swivel joint (port G)-

Swing motor (port T)

(10): Central swivel joint (port F)-

Solenoid valve

ZX215T-1006114

11 12

ZX215T-1006115

Disassembly and Assembly

SY215C

8-60

(11): Central swivel joint (port C)-

Left travel control valve (port ATL)

(12): Central swivel joint (port A)-

Left travel control valve (port BTL)

(13): Central swivel joint (port D)-

Right travel control valve (port ATR)

(14): Central swivel joint (port B)-

Right travel control valve (port BTR)

3. Remove the

xing bolt (15).

4. Remove the four mounting bolts (16).

ZX215T-1006116

Transition plate

ZX215-1006117

5. Remove the six mounting bolts (17) from

the transition plate. Remove the swivel joint
assembly (18).

Central swivel joint: 56 kg

Disassembly and Assembly

SY215C

8-61

8.14.2 Installation

●

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

Install the central swivel joint facing the
direction indicated in the illustration.

(In the illustration, the machine is seen
from the above.)

●

Oil adding (hydraulic tank)

Add through the

ller opening the hydraulic

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

●

Air bleeding

Bleed the air from the travel motor.

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

Sprocket

Central swivel joint

B D

A C

ZX215-1006118

Disassembly and Assembly

SY215C

8-62

8.15 Swivel Joint AS - Disassemble and Assemble

8.15.1 Disassembly

1. Remove the bolt (1) and the spring washer

(2).

2. Remove the cover (3).

3. Remove the gasket (4), O-ring (5) and

snap ring (6).

4. Remove the rotor (13) from the housing

(9).

★

Be careful not to damage the sliding
surface of the seal of the rotor (13).

5. Remove the spacer (7) and the gasket (8)

from the housing (9).

6. Remove the dust seal (12) from the

swing shaft (13).

7. Remove the O-ring seal (11) and the

seals (10) from the housing (9).

2
3

ZX215-1006119

ZX215-1006120

Disassembly and Assembly

SY215C

8-63

8.15.2 Assembly

1. Install the dust seal (12) on the rotor (13).

★

Let the lip face the housing while
installing the dust seal.

2. Install the six seals (10) in the housing

(9).

3. Fix the rotor (13) on a work bench. Install

the housing (9) on the rotor (13).

★

Since the clearance between the hous-
ing (9) and the rotor (13) is approxi-
mately 0.1 mm, install the housing (9)
on the rotor (13) slowly and vertically.
Be careful not to damage the seals (10)
and the O-ring seal (11).

4. Use a rubber hammer to tap the housing

(9) in order to match the rotor (13) properly.

5. Install the spacer (7) and gasket (8) in

the housing (9).

6. Install the gasket (4), O-ring seal (5) and

snap ring (6) on the rotor (13).

7. Install the cover (3). Tighten the bolts (1)

and the spring washer (2).

Fixing bolts: 49 N·m{5 kgf·m}

Dust seal

Lip

Body

ZX215-1006121

Disassembly and Assembly

SY215C

8-64

8.16 Hydraulic Tank AS - Remove and Install

8.16.1 Removal

1. Drain the hydraulic oil into a suitable

container for storage or disposal.

Hydraulic oil: approx. 225 L

2. Open the engine hood.

3. Remove the engine hood (1), cover (2)

and control valve cover (3).

4. Remove the cover mounting frame (4)

and the screen (5).

5. Remove the screen (6) and the partition

frame mounting bolt (7) on the hydraulic
tank side.

6. Remove the screw (8) and the travel alarm

(9).

7. Remove the two oil return hoses (10)

from the hydraulic tank.

ZX215T-1006122

Disassembly and Assembly

SY215C

8-65

8. Disconnect the seven hoses.

●

(11): Oil return - pilot T block

●

(12): Oil return - main pump

●

(13): Oil return D2 - main valve

●

(14): Sensor - temperature

●

(15): Oil return - solenoid valve

●

(16): Oil return D1/D3 - main valve

●

(17): Oil return - swing motor

★

Disconnect the oil inlet hose (18) from
the hydraulic tank after disconnection
of the oil inlet tube from the pump.

★

Attach each hose with an identi

cation

tag.

★

Use a sleeve nut to prevent the fitting
and the cone seal from damage.

9. Remove the hose clamp (19).

10. Lift the hydraulic tank assembly and

remove the six bolts (20).

11. Lift off the hydraulic tank assembly for

disassembling.

Hydraulic tank assembly: 130 kg

ZX215T-1006125

ZX215T-1006127

ZXT225-1106008

Disassembly and Assembly

SY215C

8-66

8.16.2 Installation

●

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

Drain plug (hydraulic tank):

58.8~78.5 N·m {6.0~8.0 kgf·m}

★

After tightening the hose clamping
screw, check that the screw should be
in the range indicated in the illustration.

Screw (hose clamp):

8.8±0.5 N·m {0.9±0.05 kgf·m}

★

Install the hose clamp and tighten the
screw according to the illustration on
the right.

Bolt:

245.2~308.9 N·m {25~31.5 kgf·m}

●

Oil adding (hydraulic tank)

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.

Screw

Up
Down

ZX215-1006128

Pipe

Clamp

Hose

Bulge

ZX215-1006129

Disassembly and Assembly

SY215C

8-67

8.17 Control Valve AS - Remove and Install

8.17.1 Removal

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.

★

Tag each line so as to ensure correction
installation.

1. Lift the hood (1).

2. Remove the cover (2) above the control

valve.

3. Remove the engine silencing hood (3).

4. Remove the baffle (4) to (9) of the pres-

sure transducer and tag them.

(4): XAK Bucket DIG

(5): XBb1 Boom DOWN

(6): XAtL Travel LEFT

(7): XBa1 Arm IN

(8): XBs Swing RIGHT

(9): XAtr Travel RIGHT

ZXT225-1106011

ZXT225-1106009

ZXT225-1106010

SANY Crawler Hydraulic Excavator SY215CLC (CUMMINS QSB6.7 engine). Shop Manual - page 34