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SANY Crawler Hydraulic Excavator SY195C9, SY205C9, SY215C9, SY225C9. Service Manual - page 41

8-159

Disassembly and Assembly

8.40.3 Removal

1. Remove the decorative button in order to

remove the interior decoration.

2. Remove the moving mechanism and the

motor.

●

Unscrew the bolts to remove the wiper
motor and moving mechanism from the
cab.

ZX215-1006305

Decoration
button

Inner decor

3. Remove the arm and the blade.

●

Unscrew the nut to remove the wiper
arm and blade from the cab.

ZX215-1006307

Arm bracket

Cap

Locknut

Cab

ZX215-1006306

Bolt

Wiper motor

Moving
mechanism

8-160

Disassembly and Assembly

8.40.4 Angle adjustment of wiper arm

●

The arm should stops moving when the
blade reaches the stopper.

●

If the arm is still working when the blade
reaches the stopper or the arm already
stops working before the blade reaches the
stopper, the moving angle of wiper should
be adjusted to prevent breakdown of the
wiper.

●

Adjust the wiper in such a way. Loosen the
locknut; adjust the arm working angle ac-
cording to actual condition. Make sure that
the wiper motor stops working at the mo-
ment that the blade reaches the mechani-
cal stopper.

8.40.5 Installation

●

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

ZX215-1006308

Stopper

Blade

Arm

Locknut

8-161

Disassembly and Assembly

8.41 Relay

8.41.1 Engine relays

1. Starter relay - check

●

Check the conduction and action. Replace
the relay in case of any failure.

2. Mains relay - check

●

Check the conduction and action. Replace
the relay in case of any failure.

3. Heater relay

●

Check the conduction and action. Replace
the relay in case of any failure.

AA2A

SW(-)

L(-)

ZX215-1006309

1(+)

2(-)

ZX215-1006310

Battery (+) terminal

5(-)

4(+)

(-)

(+)

ZX215-1006311

Fuse

8-162

Disassembly and Assembly

4. Safety relay

Measure the resistance between terminal
2 and terminal 3.

Standard Value

Approx. 200

●

Check the conduction and action. Replace
the relay in case of any failure.

3(R)

2(L)

1(S)

(P)6

(E)4

ZX215-1006312

8.41.2 Other relays

1. Function and location

ZX215-1006313

Head lamp relay

Shutdown delay relay

Parking relay

Work lamp relay

Mounting plate

Starter control relay

Pilot control relay

Horn relay

Relay harness

8-163

Disassembly and Assembly

2. Removal

1) Remove relay from its seat.

2) Remove the screw in order to remove the

relay seat and harness from the mounting
plate.

3. Installation

●

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

ZX215-1006314

Relay seat Screw

Relay

Relay harness Mounting plate

8-164

Disassembly and Assembly

4. Relay connector and wiring

ZX215-1006315

105

65
63

606

105

Relay wiring terminals

Horn relay

Work lamp relay

Pilot control relay

K10

Starter control relay

Parking relay

Head lamp relay

Shutdown delay relay

Relay model: HELLA 4RD 007 903-027

Harness socket terminals

Socket model: Jacket 8JA003526-00

8-165

Disassembly and Assembly

8.42 Sensor

1. Water temperature sensor - check

●

Put the sensor into a vessel containing en-
gine oil.

●

Heat the oil to the specified temperature.
Stir the oil at the same time.

●

Measure the resistance value between the
terminal 1 and the sensor body at different
temperatures.

Standard

Value

50±0.2°C

80±10

60°C

56.3

(ref.)

80°C

29.5

(ref.)

100°C

16.5

(ref.)

106±0.3°C

14.3±1.0

120°C

(ref.)

●

Replace the sensor if the measured value
exceeds the standard one.

2. Engine speed sensor - check

●

Measure the resistance between terminal
1 and terminal 2.

Std. Value(25°C)

2.3±0.2k

●

Replace the sensor if the measured value
exceeds the standard one.

ZX215-1006316

Sensor body

2 1

ZX215-1006317

NOTICE

●

Insufficient tightening of the engine
speed sensor may cause signal output
failure. Tighten the sensor to specified
torque.

8-166

Disassembly and Assembly

4. Fuel level sensor - check

●

Swing the float up and down in order
to measure the effective angle of radial
swing, i.e. the line through the

oat and the

turning point will swing 105°.

●

Swing the

oat up and down. The vertical

distance between the upper limit and the
lower limit of the

oat should be 500 mm.

●

Move the float to its upper limit. Measure
the resistance between the sensor terminal
R and ground with a multimeter. The mea-
sured resistance should be Ru 9.6

●

Move the float to its lower limit. Measure
the resistance between the sensor terminal
R and ground with a multimeter. The mea-
sured resistance should be Rd 86

3. Pressure sensor - check

●

Input volt: 4.75~5.25VDC

●

Output volt: 0.5~4.5V

●

Pressure range: 0~50BAR

ZX215-1006319

Float

Lever

Casing

Ternimal R

Connector

8-167

Disassembly and Assembly

8.43 Connector Terminals - Insert and Remove

8.43.1 Insertion

1. Hold tightly a wire terminal at a distance of

about 25 mm from its end.

2. Hold the connector. Let the rear seal face

you.

3. Align the terminal with a hole on the seal

and push it perpendicularly to the bottom.
Slightly pull back the wire in order to en-
sure that the terminal is locked in place.

ZX215-1006320

ZX215-1006321

ZX215-1006322

8-168

Disassembly and Assembly

8.43.2 Removal

1. Hold the connector, with its back end fac-

ing you. Select a suitable tool and clip on
the wire.

2. Push the tool along the wire into the con-

nector so that the tool can expand the ter-
minal lock shoulder and reach its flanged
part.

3. Pull out the tool to remove the wire with

terminal.

ZX215-1006323

ZX215-1006324

ZX215-1006325

System Schematics

9-1

9 System Schematics

9.1  Hydraulic System Diagram ...................................................................................... 9-3
9.2  Air-Conditioning Electrical Circuit Diagram .............................................................. 9-4
9.3  Fuse Box Relay ....................................................................................................... 9-5
9.4  Control Switches and Monitor Electrical Diagram ................................................... 9-6
9.5  Operator Cab Electrical Circuit Diagram.................................................................. 9-7
9.6  Chassis Electrical Circuit Diagram........................................................................... 9-8

System Schematics

9-2

WARNING

Read and understand all safety precau-
tions and instructions in this manual be-
fore reading any other manuals provided
with this machine and before operating or
servicing the machine. Also read the safety
information on machine decals before per-
forming any operations. Failure to do so
can cause machine damage, personal in-
jury or death.

Content .. 39 40 41 42 ..