SANY Crawler Hydraulic Excavator SY215CLC (CUMMINS QSB6.7 engine). Shop Manual - page 14

Structure and Function

SY215C

4-124

4.6.11 Pilot oil fi lter

ZX215-1002127

Model
Pressure
Precision

1- Name plate
2- Head cover
3- O-ring
4- Seal
5- Filter
6- Case

Max. delivery: 40 L/min
Filter

neness: 10

Operating pressure: 20 Mpa
Max. operating pressure: 40 Mpa
Pressure loss: 0.05 Mpa
Max. allowable pressure difference: 1 Mpa
Speci

cation of inlet/outlet port o-ring: 30×3.1

Specifi cations

Structure and Function

SY215C

4-125

4.6.12 Pump oil pressure sensor

Function

●

This sensor measures pump oil pressure
and uses it to control various machine op-
erations. When oil pressure compresses
the diaphragm, it deforms and this is de-
tected in the form of electric signals.

1- 1/8NPT Pressure connector
2- Name plate
3- Connector
4- Vent hole

ZX215-1002128

Structure and Function

SY215C

4-126

4.6.13 Hydraulic cylinder

Boom cylinder

Arm cylinder

Bucket cylinder

ZX215-1002129

267±35N.m

27.2±3.6kgm

56.9±10.7N.m

5.8±1.1kgm

544.9±5.1kgm

5340±50N.m

ZX215-1002130

37.4±3.6kgm

367±35N.m

56.9±10.7N.m

5.8±1.1kgm

806.1±5.1kgm

7900±50N.m

ZX215-1002131

27.2±3.6kgm

267±35N.m

5.8±1.1kgm

56.9±10.7N.m

559.2±5.1kgm

5480±50N.m

Structure and Function

SY215C

4-127

100 hours greasing

Unit: mm

No.

Check item

Criteria

Remedy

Clearance between pis-
ton rod and bushing

Cylinder

Standard

size

Tolerance

Standard

clearance

Clearance

limit

Replace

bushing

Shaft

Hole

Boom

-0.036 +0.222

0.083 – 0.312

0.412

-0.090 +0.047

Arm

-0.036 +0.222

0.083 – 0.312

0.412

-0.090 +0.047

Bucket

-0.030 +0.258

0.078 – 0.334

0.434

-0.076 +0.048

Clearance between pis-
ton rod support pin and
bushing

Boom

-0.030 +0.246

0.230 – 0.322

1.0

Replace

pin or

bushing

-0.076 +0.200

Arm

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Bucket

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Clearance between cyl-
inder bottom support pin
and bushing

Boom

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Arm

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Bucket

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

500 hours greasing

Unit: mm

No.

Check item

Criteria

Remedy

Clearance between pis-
ton rod and bushing

Cylinder

Standard

size

Tolerance

Standard

clearance

Clearance

limit

Replace

bushing

Shaft

Hole

Boom

-0.036 +0.222

0.083 – 0.312

0.412

-0.090 +0.047

Arm

-0.036 +0.222

0.083 – 0.312

0.412

-0.090 +0.047

Bucket

-0.030 +0.258

0.078 – 0.334

0.434

-0.076 +0.048

Clearance between pis-
ton rod support pin and
bushing

Boom

-0.030 +0.246

0.230 – 0.322

1.0

Replace

pin or

bushing

-0.076 +0.200

Arm

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Bucket

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Clearance between cyl-
inder bottom support pin
and bushing

Boom

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Arm

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Bucket

-0.030 +0.246

0.230 – 0.322

1.0

-0.076 +0.200

Structure and Function

SY215C

4-128

4.6.14 Work equipment

Dimensions

ZX215-1002133

ZX215-1002134

A-A

F-F

G-G

H-H

C-C

D-D

E-E

K-K

J-J

B-B

Structure and Function

SY215C

4-129

Greasing

Unit: mm

No.

Check item

Bush

material

Greasing

interval

Criteria

Remedy

Clearance between pin
connecting boom and
revolving frame and
bushing

Alloy

500 h

Standard

size

Tolerance

Standard

clearance

Clearance

limit

Replace

Shaft

Hole

100

–0.036
–0.071

+0.171
+0.084

0.120 ~

0.242

1.0

Clearance between pin
connecting boom and
arm and bushing

Steel

100 h

100

–0.036
–0.071

+0.282
+0.240

0.276 ~

0.353

1.0

Clearance between pin
connecting arm and
rocker and bushing

Steel

100 h

–0.036
–0.071

+0.338
+0.272

0.308 ~

0.409

1.0

Clearance between pin
connecting arm and
bucket and bushing

Steel

100 h

–0.036
–0.071

+0.336
+0.275

0.311 ~

0.407

1.0

Clearance between pin
connecting linkage and
bucket and bushing

Steel

100 h

–0.036
–0.071

+0.338
+0.272

0.308 ~

0.409

1.0

Clearance between pin
connecting linkages and
bushing

Steel

100 h

–0.036
–0.071

+0.338
+0.272

0.308 ~

0.409

1.0

Structure and Function

SY215C

4-130

ZX215-1002135

A-A

B-B

C-C

D-D

Arm dimension

Structure and Function

SY215C

4-131

Unit: mm

No.

Standard size

Tolerance

+0.1

107

+1.5

310

-0.3
-0.8

+0.174
+0.104

365.6

±1

187.2

±0.5

829.1

±1

2,919

—

2,631.3

±1

411

—

640

±0.2

600

±0.5

458

—

+0.373
+0.273

325

-0.5

+0.1

Arm itself

311

-0.5

When press

tting bushing

325

—

Min.

1,680

—

Max.

2,800

—

Structure and Function

SY215C

4-132

4.7 Air Conditioning System

1-  Hot water piping
2-  A/C compressor (DENSO.2)
3- Refrigeration piping
4- Condenser (SG447750-A040)
5- Reservoir (DENSO.4)
6-  Hot water return piping

7- Refrigeration unit
8- Air duct
A. Fresh air

B. Recirculated air

C. Warm air/cool air

ZX215-1002137

Structure and Function

SY215C

4-133

4.7.1 A/C components layout drawing

1- Sunlight sensor
2- Control panel
3- Air conditioning unit
4- Condenser

5- Compressor
6- Fresh air sensor
7- Recirculated air sensor

ZX215-1002138

Structure and Function

SY215C

4-134

Remark:

When Auto mode switch (5), Air circulation
control switch (6) and A/C switch (8) are
turned on, indicator lights above these switch-
es will light up.

4.7.2 Control panel

1- OFF switch
2-  Fan speed control switch
3-  Temperature control switch
4-  Air outlet mode switch
5-  Auto mode switch

6- Air circulation control switch
7- LCD display
8- A/C switch
9- Sunlight sensor

ZX215-1002139

Monitor

FULL AUTO AIRCONDITION

OFF

TEMP

MODE

AUTO

A/C

Structure and Function

SY215C

4-135

4.7.3 Circuit diagram

ZX215-1002140

1.256

1.25L

GND

REC

FFE

BLCM

0.5B

2RL

ACC

200W

0.50

80W

1.25B

0.85B

40W

BLC

40A

60A

15A

20A

1.25R

1.25RL

27
4

21
20

25
9

1.25R

OFF

ACC
MS
T

ACC

START

Structure and Function

SY215C

4-136

Wire No. Diameter/Color code

Wire color

Wire No. Diameter/Color code

Wire color

Black

0.5VW

Violet+white

Br(R)

Brown

0.5YB

Yellow+black

0.85W

White

0.5WO

White+orange

Red+blue

0.5PB

Pink+black

Green

0.5VR

Violet+red

0.5BL

Black+blue

0.5BG

Black+green

0.5R

Red+blue

0.5WY

White+yellow

0.5Y

Yellow

0.5WR

White+red

0.5BR

Black+red

0.5BrW

Brown+white

0.5BrY

Brown+yellow

0.5GO

Green+orange

0.5BY

Black+yellow

0.5Sb

Sky blue

0.5GW

Green+white

0.5OW

Orange+white

0.5LO

Blue+orange

1.25V

Violet

0.5PG

Pink+green

1.25RG

Red+green

0.5RY

Red+yellow

1.25RW

Red+orange

0.5BW

Black+white

0.85GL

Green+Blue

0.5LgR

Light green+red

Code

Name

Code

Name

Code

Name

A/C ampli

Condenser fuse

Condenser high speed

relay

BAT

Battery

A/C main fuse

Protective relay

BLC

Speed regulating resistor

Alternator

Sunlight sensor

Battery relay

A/M servo motor

Condenser pressure

switch

Diode

Blower motor

HI/LO pressure switch

Diode 1

Condenser motor

Switcher

Diode 2

Internal/External air servo

motor

External air thermistor

Compressor clutch

Air outlet servo motor

Anti-frosting thermistor

Fuse

FRONT outlet servo motor

Internal air thermistor

Fuse

Condenser resistor

Water temp. thermistor

Blower fuse

Blower main relay

Compressor relay

Condenser relay

Structure and Function

SY215C

4-137

4.7.4 Refrigeration principle

4.7.4.1 Refrigeration cycle diagram

4.7.4.2 Heating cycle diagram

ZX215-1002141

Cool air

Lo-pressure part

Hot air

Hi-pressure part

Lo temp\Lo press\Gas

Air in cab

Out side fresh air

Cooling fan

Lo temp\Lo press\Liquid (Mist)

Hi temp\Hi press\Liquid

Lo-pres.
side

Hi-pres.
side

Compressor

Blower motor

Evaporator

Reservoir

Expansion valve

Hi-temp hi-pres gas

ZX215-1002142

Engine

Water pump

Water valve control

Blower motor

Internal air

Low tempr water

High temp water

Hot air

Radiator

Structure and Function

SY215C

4-138

4.7.5 Compressor

1- Stator
2-  Front radial bearing
3- Thrust bearing
4-  Front radial bearing
5-  Rear cylinder head
6- Safety valve
7-  Rear cylinder block
8- Swash plate

9- Slipper
10- Front cylinder block
11- Piston
12- Front cylinder head
13- Shaft seal
14- Main shaft
15- Hub
16- Rotor

ZX215-1002143

Structure and Function

SY215C

4-139

Operating principle

Compressor type: 10S15C. This compres-
sor has 5 plungers in total with a piston on
both sides of each plunger. The rotation of
the swash plate drives the pistons to move

back and forth and transforms the refrigerant
sucked from the evaporator from low tempera-
ture and low pressure gas state to high tem-
perature and high pressure state.

ZX215-1002144

Process

HI press.end pipe

HI press.end pipe LO press.end pipe

LO press.end pipe

HI press.end pipe LO press.end pipe

Valve plate

Outlet valve disc

Main shaft and swash plate

HI press.end pipe LO press.end pipe

Intlet valve disc

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