SANY Crawler Hydraulic Excavator SY195C9, SY205C9, SY215C9, SY225C9. Service Manual - page 7

Structure and Function

Unit: mm

No.

Check item

Criteria

Remedy

9

Vertical width of 
idler guide

Standard size Tolerance

Repair limit

Build-up 

welding or 

replace

Track frame

107

—

—

Idler support

105

—

—

10

Horizontal width 
of idler guide

Track frame

250

—

—

Idler support

247

—

—

11

Recoil spring

Standard size

Repair limit

Replace

Free length

x Outside 

diameter

Installation 

length

Installation 

load

Free 

length

Installation 

load

598 x 247

466

157.9 kN

{16112 kg}

545

133.9 kN

Model

Item

SY195C9

SY205C9

SY215C9

SY225C9

Shoe width(mm)

600

600

600 

600 

Link 

pitch(mm)

190

190

190

190

Q'ty (One side)

45

46

47

49

Standard track shoe

4-16

Structure and Function

4.3.2  

Idler

W13081901

3

5

4

6

8

7

1

2

157~255 Nm

4-17

Structure and Function

Unit: mm

No.

Check item

Criteria

Remedy

1

Outside diameter of protru-
sion

Standard size

Repair limit

Build-up 

welding or 

replace

560

—

2

Outside diameter of tread

520

508

3

Thickness of tread

30

24

4

Difference of tread

20

26

5

Total width

164

—

6

Width of tread

39.5

—

7

Diameter of shaft

65

—

Replace

8

Clearance between bush-
ing and support (Sum of 
clearance at both sides)

Standard clearance

Clearance limit

0.5~1.0

—

4-18

Structure and Function

4.3.3  

Carrier roller

ZX215-1002011

1

2

4

3

5

8

7

6

Unit: mm

No.

Check item

Criteria

Remedy

1

Outside diameter of 

fl

 ange

Standard size

Repair limit

Replace

165

—

2

Outside diameter of tread

140

130

3

Width of tread

44

—

4

Thickness of tread

41.5

34

5

Width of 

fl

 ange

18

—

6

Clearance between shaft 
and bushing

Standard 

size

Tolerance

Standard 

clearance

Clearance 

limit

Shaft

Hole

50

—

—

—

—

7

Interference between roller 
and bushing

Standard 

size

Tolerance

Standard 

interference

Interfer-

ence limit

Shaft

Hole

57

—

—

—

—

8

Axial clearance of roller

Standard clearance

Clearance limit

0.44 – 0.76

—

4-19

Structure and Function

4.3.4  

Track roller

Unit: mm

No.

Check item

Criteria

Remedy

1

Outside diameter of 

fl

 ange

Standard clearance

Repair limit

Build-up weld-

ing or replace

193

—

2

Outside diameter of tread

160

148

3

Thickness of tread

46.5

40.5

4

Total width

237

—

5

Width of tread

46.5

—

6

Width of 

fl

 ange

32

—

7

Inside width

80

8

Diameter of shaft

65

—

Replace

9

Clearance between bushing 
and collar

Standard clearance

Clearance limit

0.5 – 1.0

—

W13081902

549±59 Nm

4

5

7

9

3

6

8

2

1

4-20

Structure and Function

4.3.5  

Track shoe

W13100801

1

19

7

21

20

22

23

15

4

10

9

6

5

8

14

2

11

13

12

24

3

18

16

17

4-21

Structure and Function

Unit: mm

No.

Check item

Criteria

Remedy

1

Link pitch

Standard size

Repair limit

Reverse or replace

190

193

2

Outside diameter of bushing

Standard size

Repair limit

59.45

53.7

3

Thickness of bushing metal

10.75

5.75

Repair or replace

4

Link height

Standard size

Repair limit

105

98

5

Shoe bolt pitch

155.57

Adjust or replace

6

119.57

7

69

8

Link 

Inside width

82.57

9

Overall width

40

10

Tread width

38

11

Protrusion of pin

Regular

2.7

Master

2.7

12

Protrusion of bushing

Regular

3.7

Master

0.0

13

Overall length of pin

Regular

207

Master

209

14

Overall length of bushing

Regular

136

Master

128.5

15

Thickness of spacer

—

16

Press-

fi

 tting force

Bushing

88.2 – 245 kN {9 – 25 ton}

—

17

Regular pin

127.4 – 274.4 kN {13 – 28 ton}

18

Master pin

78.4 – 147 kN {8 – 15 ton}

4-22

Structure and Function

Unit: mm

No.

Check item

Criteria

Remedy

19

Shoe bolt

a. Regular link

Tightening torque (Nm {kgm})

Retightening angle (°)

Retighten

Triple grouser 

shoe

750±22.5

{62.5±2.3}

120±10

b. Master link

Tightening torque 

(Nm {kgm})

Retightening angle 

(°)

Lower limit torque 

(Nm {kgm})

—

—

—

20

Interference between 
bushing and link

Standard size

Tolerance

Standard interfer-

ence

Adjust or 

replace

Shaft

Hole

59.45

0

-0.05

-0.25
-0.32

0.20 – 0.32

21

Interference between regu-
lar pin and link

38.25

0

-0.04

–0.23
–0.29

0.19 – 0.29

22

Clearance between regular 
pin and bushing

Standard size

Tolerance

Standard clear-

ance

Shaft

Hole

38.25

0

-0.04

0.8
0.5

0.50 – 0.84

23

Interference between mas-
ter pin and link

Standard size

Tolerance

Standard interfer-

ence

Shaft

Hole

38.25

-0.08

-0.11

-0.23
-0.29

0.12 – 0.21

24

Clearance between master 
pin and bushing

Standard size

Tolerance

Standard clear-

ance

Shaft

Hole

38.25

-0.5
-0.7

1

0.5

1 – 1.7

4-23

Structure and Function

4.3.6  Triple grouser shoe

ZX215 1002014

1

2

3

4

5

6

7

8

Unit: mm

No.

Check item

Criteria

Remedy

1

Height

Standard size

Repair limit

Build-up welding 

or replace

26

16

2

Thickness

10

3

Length of base

29.5

4

22

5

Length at tip

 20.5

6

17

7

18

8

Thickness

Standard size

Repair limit

36

26

4-24

Structure and Function

18A. Pilot lockout solenoid valve
18B. Boom priority solenoid valve
18C. Bucket con

fl

 uence solenoid valve

18D. Swing priority solenoid valve
18E. Hi/Lo travel speed solenoid valve

1)

Bucket 

cylinder

2)

Arm 

cylinder

3)

Boom 

cylinder

4)

Hydraulic 

tank

5)

Hydraulic 

oil 

fi

 lter

6)

Control 

valve

7)

Hydraulic 

pump

8)

Radiator

9)

Accumulator

10) Left travel motor
11) Right travel motor
12) Swing motor
13) Lockout lever
14) Left pilot valve
15) Center swivel joint
16) Right pilot valve
17) Travel pilot valve
18) Solenoid valve assembly

4.4  

Hydraulic System, Part 1

4.4.1  

Hydraulic equipment layout

1

Structure and Function

3

4

5

6

7

A

A

8

9

10

11

12

13

14

15

16

17

18

18A

18B

18C

18D

18E

2

Structure and Function

4.4.2  

Hydraulic tank and fi lter

ZX215-1002017

1

2

3

4

5

7

6

A-A

A

A

1)

Hydraulic 

tank

2)

Level 

gauge

3)

Oil 

fi

 ller cap

4)

Return 

oil 

fi

 lter element

5)

Bypass 

valve

6)

Breather 

valve

7)

Oil-suction 

fi

 lter element

Specifi cations

Tank capacity: 239 L (63 US gal)
Available capacity: 172 L (45.5 US gal)

Breather valve

Filter 

fi

 neness: 10

μ

m

Ambient temperature: -20~100°C
Set pressure:

Air inlet side: 0.005MPa
Air outlet side: 0.05MPa

4-27

Structure and Function

ZX215-1002018

a1
{36N·m}

a2
{36N·m}

a5
{16N·m}

a4
{36N·m}

PH1

PH2

A1

A2

A3

4

1

2

3

5

B1

B3

Psv2

DR2{170N·m}

DR4{170N·m}

DR3{170N·m}

DR1{170N·m}

a3
{36N·m}

Clockwise

Type: K3V112DTP1N9R

4.4.3  

Hydraulic pump

  

4-28

Structure and Function

a1:    F. pump main pressure detection port
a2:    R. pump main pressure detection port
a3:    F. pump regulator pressure detection port
a4:    Adjustor control pressure detection port
a5:    Pilot gear pump output pressure detection port
PH1:  F. pump pressure sensor assembly port
PH2:  R. pump pressure sensor assembly port
A1:    F. pump delivery port
A2:    R. pump delivery port
A3:    Pilot gear pump delivery port
Psv1:  F. pump regulator control port
Psv2:  R. pump regulator control port
Dr1:   F. pump drain plug
Dr2:   R. pump drain plug
Dr3:   Air bleeder
Dr4:   Drain plug
B1:    Pump suction port
B3:    Pilot gear pump oil suction port

1)

Front 

pump

2)

Rear 

pump

3)

Pilot gear pump

4)

Front pump regulator

5)

Rear pump regulator

Outline

●

This pump consists of 2 variable capacity swash plate plunger pumps, 2 regulators, and 1 pi-
lot gear pump.

NOTE: For the location of the hydraulic pump on the machine, see “Hydraulic equipment layout” 
on page 4-24.

4-29

Structure and Function

1)

Front 

shaft

2)

Min. delivery adjusting screw

3)

Front 

casing

4)

Swash 

plate

5)

Slipper

6)

Plunger

7)

Cylinder 

block

8)

Valve 

plate

9)

End 

cover

10) Rear shaft
11) Rear casing
12) Gear pump
13) Piston
14) Max. delivery adjusting screw
15) Gear shaft
16) Driving pin

ZX215-1002019

3

5

4

1

2

13

6

7

14

9

16

10

15

8

12

11

4-30

Structure and Function

Function

●

The  torque of the engine is transmitted
to the pump shaft (1), and drives cylinder
block (7) to rotate. At the same time, nine
plungers (6) slide along the thrust plate (8).
Plunger (6) moves back and forth inside
cylinder block (7) and pressurized oil is
sucked and discharged alternatively.

●

It is possible to change the discharge
amount by changing the swash plate an-
gle.

ZX215-1002020

18

1

5

A

4

18

17

6

B

13

7

8