oil capacity GREAT WALL FLORID 2008 Service Manual

Downloaded from www.Manualslib.com manuals search engine GWFLORID Maintenance Manual96
Brake System Maintenance
Brake fluid inspection and replacement
Brake fluid directly influences the brake performance and the operating conditions and use life of the brake
system components. Brake fluid has very strong hygroscopic properties, and thus absorbs water easily,
which will then deteriorate the metal and rubber pieces. Polluted and deteriorated brake fluid or its mixture
would cause the brake fluid to boil and gasify, hence reduces braking efficiency. Therefore, pay attention to
the items below when filling or changing the brake fluid:
1. Containers used to hold brake fluid must be tightly closed and sealed
2. Brake fluid is poisonous and damaging to the paint. Hence if it gets on the vehicle surface, rub it
off at once
3. If water or other contaminates found in the brake fluid, and the brake master cylinder's piston seal
has been broken, then the brake fluid and all the rubber pieces inside the brake system including
the brake hose must be replaced
4. The correct brake fluid level in the reservoir must be between MAX and MIN. After the vehicle has
been driven for over 1000 km, check the brake fluid level in the reservoir. If the brake fluid level is
not up to regulation, more brake fluid should be added to the reservoir \
until it reaches MAX.
Hydraulic component inspection and system flushing
1. If the oil-based solvent gets into the hydraulic system, flush the whole system and change all of
the rubber pieces
2. Clean your hands before installing new rubber pieces or other components
3. Do not use regular solvents (kerosene, gas, etc.) when inspecting or cleaning hydraulic
components, instead use absorbing alcohol or brake fluid
4. After inspecting the components, drain the brake fluid from the system. Use new brake fluid to
flush the system. Afterwards, add new brake fluid to perform hydraulic system exhaust
5. Flushing completion sign: When the brake fluid flowing out of the dump valve is clear from any
contaminate.
Hydraulic pressure system drainage
If the brake fluid inside the whole hydraulic pressure system needs to be emptied, open all the bleed screws
with each connected to a hose, as to allow the brake fluid to flow into a container. Step on the pedal slowly
until only air flows out. During the whole procedure, make sure all the \
valves are open.
Hydraulic pressure system air bleeding
The hydraulic brake system must work under a vacuum environment. The air will cause spongy brake or
overall brake failure when it flows into the hydraulic system. It is extremely necessary to bleed system air
when performing any operation on the brake system or if any air inside t\
he brake system is suspected.
1. Air bleeding sequence
If air inside the brake master cylinder is suspected, first perform air bleeding.
(a) If numerous valves are equipped, air bleed each valve
(b) Another sequence principle is: Air bleed from the wheel brake furthest away from the master cylinder.
The air bleeding sequence for the LHD modules is: rear right wheel - left rear wheel - front right wheel
- front left wheel, Right rudder vehicles: rear right wheel - left rear wheel - front left wheel - front right
wheel.
2. Air bleeding method
(1) Manual air bleeding
Use the brake pedal or pump as the air bleeding power source. When the air bleed screws are open, vent the
brake fluid containing the bubbles from the system. Usually this is simultaneously done by two people. One
steps on the brake pedal and the other operates the air bleed screws. Important points to take note of when
performing the operation:
(a) Place the ignition switch to the off position and step on the pedal repeatedly to remove the
vacuum pressure or hydraulic pressure.
(b) Before and after air bleeding, add clean brake fluid into the master cylinder until it reaches
the correct (stated) level.
(c) Check the fluid level frequently to make sure that more than half of the reservoir's capacity is
available.
(d) Bleed screws should only be opened when the pedal is pressed down, and closed before the
pedal is loosened. Meanwhile, check if the vented brake fluid has bubble\
s inside.

Downloaded from www.Manualslib.com manuals search engine 107Brake System
Anti-lock Brake System
ABS/EBD introduction
1. Operation
The vehicle's Anti-lock Brake System (ABS) is a type of increasingly popular brake safety device. It detects the
wheel's speed using wheel speed sensor detection. After signal processing, the wheel speed will be transferred
to the computer, which controls the solenoid valve’s operating condition and the pressure inside the brake wheel
cylinder to avoid wheel locking by using certain calculations and control methods based on the wheel speed.
ABS helps the vehicle to avoid sliding, deviation, fishtailing, and losing steering control capacity. ABS improves
the vehicle’s handling capability, stability and shortens braking distance. It also helps the vehicle to avoid the
partial wear and tear of wheels, hence improves the tire's useful life.
Electronic Brake Distribution (EBD) is used to adjust the vehicle's rear wheel brake pressure by using the ABS
components when the ABS does not respond to vehicle braking. It is also used to balance the vehicle’s front and
rear wheel brake pressure, maximizing the vehicle's braking efficiency. EBD uses the ABS components, yet its
controlling logic is independent from the ABS. After the ABS responds, the EBD will disengage.
2. Basic structure
3. ABS working process
(a) Pressure rising phase: While service braking, oil pressure output from the pump passes the inlet solenoid
valve and enters the brake wheel cylinder. The brake generates braking force and the wheel speed sharply
declines until the ABS control unit detects that the wheel is starting to lock via the wheel speed sensor
detection.
(b) Pressure maintaining phase: When the ABS control unit detects that the wheel is starting to lock via wheel
speed sensor signal, the inlet solenoid valve closes, with the outlet solenoid valve shut as usual. The
pressure maintaining phase thus begins.
(c) Pressure drop phrase: During the pressure maintaining phase, the wheels tend to lock further. This brings
the ABS into the pressure drop phrase. With the inlet valve closed and the outlet valve open, the hydraulic
pump starts working, and brake fluid returns to the brake pump from the wheel cylinder by passing through
the low pressure accumulator. The brake pressure reduces and the brake pedal bounces back.
(d) Pressure maintaining phase: With the degree of wheel locking decreases and wheel speed begins to
increase, the pressure maintaining phrase begins.
(e) Next cycle’s pressure rising phase: When the wheels reach a certain speed, the ABS enters the pressure rise
phase and starts the next cycle.
Note: The ABS's pressure adjusting frequency is generally 2 to 4 cycles per second.
ABS control unit
Wheel speed sensor
Wheel speed signal
Wheel cylinder
Valve work instruction
Hydraulic modulator
Vacuum booster & master cylinder

Downloaded from www.Manualslib.com manuals search engine 203Air Conditioning System
Areas of Importance
1. When putting in a new compressor, adjust the new compressor's inner lubricant to make it the same
level as of the old compressor's.
2. When the air conditioner malfunctions, if the pipeline, condenser or evaporator is the source of the
damage leading to its replacement, just add model number RS20 profession\
al lubricant 5-10 ml.
3. The compressor is a high speed operating component, the smallest impurity in the air conditioning
system can lead to the compressor's damage, therefore the entire air conditioning system must be
cleaned.
4. In order to avoid liquid damage to the compressor, pay careful attention when filling the refrigerant.
When the vehicle stopped, fill the liquid refrigerant from the high pressure side. When in operation, fill
the liquid refrigerant from the low pressure side.
5. When undergoing maintenance, pay attention that the amount of refrigerant being added is 510±10 g.
Observe through the check glass to determine if there is sufficient new refrigerant charge.
ItemParameter
Compressor
ModelRotary vane compressor (JSS-96TV4-4)
Discharge capacity96 ml/r
Number of vanes5
Normal rotational speed range800-7800 r/min
Max. speed8400 r/min
Weight4.744 kg (without clutch)
Pressure resistanceLow pressure side 50 kg/cm2, High pressure
side 75 kg/cm2
Leakage≤14 g/year
Direction of rotationClockwise (looking from the clutch)
RefrigerantR134a
Lubricant numberRS20
Lubricant capacity 200±10 ml
Clutch

Min. pull-in voltage7.5 V (12 V)
Pulley style 4PK810
Weight2.1 kg
Rated voltage12 V (DC)
Power consumption≤45W (20oC DC 12 V)
Static friction torque≥40 N·m
Pulley diameterφ110 mm
Coil resistance(3.5±5%) Ω
Thermal protectorOperating temperatureOn / Off (130±5)oC/(150±5)oC
Rated voltage, current16 V, 5 A

Technical Parameters