Rf valve GREAT WALL SAILOR 2006 User Guide

BR-44Braking System
Load Sensing Proportion Valve
(b) Tear down the mounting bolts of valve bracket, and load
sensing proportion valve cluster.
Mount of Load Sensing Proportion Valve
1. Mount the load sensing proportion valve cluster on the
frame.
2. Connect the claming head II with the bracket:
(a) Mount the claming head on the load inductive spring;
(b) Adjust the spacing A.
Initial adjustment: 78 mm;
(c) Mount the claming head II on the claming head bracket
3. Connect the brake pipeline;
Connect the brake pipeline with SST.
Fastening torque

Dr SF
(18
2)N
m
SL SK SY SJ
(19
1)N
m
4. Adjust the rear shaft load
5. Adjust the valve:
(a) When drag downward the load inductive spring, the
valve piston shall move downward smoothly.
(b) When mount the valve body, the valve piston shall touch
the load inductive sensing spring lightly.
(c) Screw up the mounting nuts of valve body.
SST

BR-45Braking System
Load Sensing Proportion Valve
6. Exhaust the air in braking system
7. Check and adjust the hydraulic pressure of load
sensing proportion valve.

SR-11Steering System
Power Steering (General Introduction)
power steering oil pump
power steering gear steering drive shaft
oil cup
Power steering
Introduction
Principal of Power Steering
The power steering is a kind of hydraulic device that use
the engine power to steer. The engine drive the power
steering oil pump to generate the hydraulic pressure, which
actuates the piston in steering gear, so that the worm shaft
can provide to the piston with a supplementary force, which
has relation with the pressure actuated on the piston.
Therefore, pressure increase is required if larger steering
force is needed, and the pressure variation is accomplished
through the control valve.
Intermediate position (forward straightly)
The liquid from the power steering oil pump is sent to
the control valve, which, if locates at the intermediate, will
allow the liquid to pass and enter into the drain outlet, finally
return the pump. At this time, it is difficult to increase the
pressure; meanwhile, due to the equal pressures at the both
sides of the power piston, it cannot move toward either side.
Steering time
When the steering drive shaft move toward either side,
the control valve will move together with it, in case one oil
passage is shut off, meanwhile open the other larger, the
liquid flow variation will increase the pressure, as result, the
unequal pressure at both sides of piston will make the piston
move toward the side of smaller pressure, therefore, the
liquid is pressed in the pump through the control valve.
pump control valve
drain outlet
power cylinde
power piston
segmental gear shaft worm shaftsteering gear
Pump

SR-12Steering System
Power Steering (Introduction)
Suggestion on maintenance
The failure of power steering system usually relates to the
steering difficulty due to lack of supplementary force. In such
case, it is the first to verify the problem is produced by the pump
or steering gear when repairing. In doing so, the problem can be
checked on vehicle with the pressure meter.
On-vehicle Inspection
As the power steering is a hydraulic pressure device, its
trouble usually caused by the lack of specified hydraulic
pressure or the abnormal work of control valve. As a result, it
cannot acquire the moderate hydraulic pressure.
In case the problem is caused by the pump, the steering
wheel will deflect toward right or left. On the other side, if the
problem is caused by control valve, when the steering wheel
rotates to left or right, the steering will become more difficult
due to the unequal supplementary force. However, when there
is wear on the piston sealing ring of power cylinder, it also cause
the hydraulic pressure loss that may lead into steering difficulty
toward right or left.
Before making inspection on vehicle, verify the power
steering system firstly to see whether there is air. If any, the air
volume will increase with the variation of hydraulic pressure,
which will cause the hydraulic pressure fluctuation that makes
the power steering work abnormally. In order to verify whether
there is any air in the system, check whether the liquid level
varies or not when the steering wheel rotates completely toward
the right or left. For instance, if there is air in the system, the air
will be compressed, which will reduce the liquid level
remarkably, when the steering wheel rotating. If there is no air
in system, the liquid level variation is very small even though
the hydraulic pressure increases. This is because the liquid
volume will not varies when being compressed. And the small
liquid level variation is caused by the expansion of hose
between the pump and steering gear when the hydraulic pres-
sure increasing.
Meanwhile, the air in system sometimes will cause the
pump or steering gear produce noise when the steering wheel
rotating completely toward a certain direction. After checking
or exchanging the pump or steering gear, the on-vehicle inspec-
tion should be often conducted to guarantee the normal work of
power steering system.

BE-8Body Electric System
Protective Box Position and Content
Content of Protective Box
1 protective box I
fuse
1.Small lamp 10A
2.Rain brus 20A
3.Ceiling lamp 10A
4.(Cigarette lighter) 15A
5.Back -u 15A
6.Brake 10A
7.electric window 30A
8.Instrument 10A
fuel delivery/break electromagnetic valve10A(diesel

9.Central control lock 15A Dr
A
B
C



1
2
3
456
789
SL SK
U
N
O
V
P
Q
R NM
NN
NO
S
T NP
NQ
FUSE
1. Protection 10A
2. Unload
3. Charging 10A
4. Back-up 10A
5. ECU 10A
6. Unload
7. Rain wiper 10A
8. Stop lamp 10A
9. Ceiling lamp 10A
10. Central control lock 15A
11. Dual flasher 10A
12. EC 10A
13. Fuel pump 10A
14. Cigarette lighter 15Arelay
A electric window relay
B. small lamp relay
C.(flasher)

(plugging elements of ceiling
lamp wire harness)

(plugging elements of wire
harness in engine room)

BE-80
Wire harness at tail door and of rear air-conditioner
SY SJ
wire harness of rear
air-conditionerwire harness
of rear brush
1
2
3456
7
8V 10 1112 13
NQ
Only the vehicle with SY model has the wire harness of rear air-conditioner shown in above-mentioned wire harness.
1 rear A/C switch
2 connected to cab wire harness
3 rear air-conditioning relay
4 grounding wire
5 temperature control switch
6 electromagnetic valve
7 temperature controller8 speed-adjusting resistance
9 license lamp
10 license lamp
11 rear brusher motor
12 defroster
13 defroster
14 connected to cab wire harness
Body Electric System
Wire Harness Distribution

AC-3Air Conditioning System
Introduction
(c) Tighten the O-ring matching position or the threaded position
to the specified moment.
4. Take notice when connecting measuring meter at branch pipes:
(a) Connect the end of filling hose with high speed joint to the
filling valve of compressor.
(b) Letter
D
marked on the compressor near the auxiliary valve
represents the side of high voltage while
S
means the side of
low voltage, which shall be looked out when connecting the hose.
(c) Fasten the bolts by hand, and
(d) In order to prevent the hose from loosing, lubricant oil shall not
be spread at the connection position.
Remarks: after connecting the measuring meter on branch pipes to
the refrigerant container (repairing tank), the air in the hose shall be
exhausted up.
5. Take notice when vacuumizing:
After vacuumizing for 20 min, maintain the container at certain
pressure to ensure that all air in it is exhausted up, and another
inspection shall be made to see whether there is leakage.
6. Take notice when handling with the refrigerant container
(repairing tank):
(a) Do not heat it.
(b) Store the container at the place where temperature is under 40

(c) In case of heating the repairing tank with hot water, care shall
be paid to the valves at the top of tank, do not dip them into the
water, or the water will penetrate into the cooling system.
(d) The empty repairing tank is forbidden to reuse.
8. Take notice when using the high-pressure air cylinder type
inspecting device:
(a) In case the open fire is used, it is the first to ensure before using
there is no flammable material around.
(b) Be careful because toxic gas will be produced when the
gaseous refrigerant meets with the open fire. 7. Take notice in the A/C operation or when adding the liquid
refrigerant:
(a) In case the gaseous refrigerant in the cooling system is
insufficient, which can lead to the compressor burns out, and
such accidents shall be avoided.
(b) If the valve on the side of high pressure is uncovered, the
refrigerant will flow in the reverse direction, which may lead
to the break of the repairing tank, therefore, only valves on the
side of low pressure are allowed to open or closed.
(c) If the repair tank is laid in reverse direction, and the refrigerant
is added in liquid status, the liquid refrigerant will be
compressed, which may lead to failure of the compressor,
therefore, refrigerant shall be inflated in the gaseous status.
(d) Be careful not over-inflate the gaseous refrigerant, otherwise,
such failures as insufficient cooling, increase of oil consuming
or over heat of engine will be followed.
under 40

incorrect
correct
measuring meter of branch pipe
loose over-fastened
A/C operation

AC-5Electric Circuit Diagram of Air
Conditioning System
SF
ST
fusethree-state pressure switch
cold-hot
servomotor circular
servomotor mode
servomotor main air-conditioning
control panel
speed
adjusting
module
air blower
b`r
power resistor
water
valve
Mjjj
M
ACCON
+12V 5
R R 5
5 5 5 5
5
5 PP
P P 3
3
3 3 3 3
3
3
3 1
111
1
1
1 N
N N
1
2 2 2 2
2
22 O O OO
4
44 4
4 4 4Q
Q
Q Q
4
6 6
6 6 6
6S S 6
S6
7
7
7 8
88 9
9
9 10
1010
1111
12
13 14 15 16 17 18 1920
20 21 22 23 2423
ignition switch modular air-door motor cold-hot air-door motor air-in motor
three-stage
pressure switch speed adjusting
modul air conditioning
ignition switchsmall light relay
fusefuse electronic fan
water temperature relay
fuse
compressor relayelectromagnetic
fan relay
compressor clutch
24
Electric circuit diagram of air-conditioning system (continued)
battery
18
5
17
16
3
15
19
14
22
1
13

AC-7Air-Conditioning System
(Electric Circuit Diagram)
compressor
compressor relay
fuse
rearignition switch
electromagnetic
cutoff valve
rear speed-adjusting
resistance temperature controller
rear wind-velocity switch
rear air-conditioning relay
air blower
electromagnetic fan relay
electromagnetic fan
air-conditioning request relay A/C switch
R ECU
pressure switch
speed-adjusting resistance
air
blower
blower relay
(electricity-connecting and
charging indicating lampair-conditioning
request relay
connect with ECU 2
1
312
3
3
3 22
1
1
44
44 1
1 2
23
35
5
56
6 6
4fuse1
1
1
1
1
1
1
1 22 2 22 22 23
3
3
3
3
3
3
3 4444 4 4
5
5
5
5 6
6
6
6 7
7 88
SY
STACC ON
rearignition
switchtemperature
controllerrear wind-
velocity switchrear speed-
adjusting resistancespeed-adjusting
resistanceair-volume
switchA/C switchignition switch
ignition switch
fuse heat-sensitive resistance
(air-volume
switch)
fuse
Electric circuit diagram of air-conditioning system (continued)
battery
ECU

AC-9Air-conditioning System - General introduction
General introduction
Refrigeration cycle
1. The refrigerant at the lower pressure side is condensed by the
compressor into the HT and HP gaseous refrigerant.
2. These gaseous refrigerant flows into the condenser, where it is
turned into liquid refrigerant.
3. Those liquid refrigerant flows into the liquid tank, where the
liquid refrigerant is stored and filtered so as to satisfy the
requirement of evaporator.
diaschage vent indraft vent
compressor
curent direction
evaporator heat
heat expansionvalve
liquid tank
4. The liquid refrigerant is throttled by the expansion valve to reduce the pressure, so that the liquid refrigerant is turned
into the LT and LP mixture of liquid and gaseous refrigerant.
5. The cold and fog-like refrigerant flows into the evaporator, where it is vaporized with the given heat, which is
absorbed from the hot air flow by the evaporator core. All liquid refrigerants are turned into the gaseous refrigerant
in the evaporator, and only the heated gaseous refrigerant is absorbed into the compressor. Then repeat the above-
mentioned cycling approach.
The refrigerant released from
the evaporator expands and
inflows through the evapora-
tor pipe. During this process,
the refrigerant absorbs the
heat in the air around the ra-
diating rib and pipe and
vaporizes, so that the tem-
perature inside the vehicle
reduces gradually.
The condenser allows the heated gas-
eous refrigerant to release heat to the
cooling air of engine, therefore, the gas-
eous refrigerant is cooled and turned
into liquid state again.
The expansion valve is used
to measure the gaseous re-
frigerant entered into evapo-
rator core, which reduces the
pressure and temperature of
refrigerant gradually.
The liquid tank is used to exhaust
the water in system and to filter
the dust and dunghill. It serves as
the store to store the redundant
refrigerant.
The compressor absorbs the
gaseous refrigerant emitted
from the evaporator and com-
presses it. In doing so, the tem-
perature and pressure of gas-
eous refrigerant increases
rapidly.