oil GREAT WALL HOVER 2006 Service Repair Manual

Instroduction-5
e. Mount the cable terminal onto the binding post of the loosened nut,
then tighten the nut. Does not use hammer to knock at the terminal
onto the post.
f. Do remember to check whether the positive pole (
) terminal cap
is in its position.
4. Check all the soft tubes and wire terminal, check to see whether
they are connected correctly and firmly.
5. Used component which can not be used any more.
a. The following spare parts needs always to be renewed: split pin,
seal gasket, O ring and oil seal, etc.
b. For the used component which can not be used any more, it is
indicated by symbol “¦” in elements diagram.
6. Precoated component
The precoated component includes the bolt and nut which is precoated
with the locking sealant in factory.
a. If the precoated component is tightened, loosed or moved by any
reason, it must be recoated with the specified sealant.
b. Coating procedure of precoated component
Remove the old sealant from the screw of component by washing.
Dry it by compressed air.
Coat the screw of components with the specified locking sealant.
c. The precoated component is indicated by symbol “?” in elements
diagram.
7. It can use the sealant or seal ring to prevent the leakage if
necessary.
8. Abide by all specifications for bolt torque strictly. It should use
the torque wrench.
Comprehensive maintenance instruction
1. Use the protection plate, seat and floor covering cloth to make
the car clean and prevent it from being damaged.
2. During the disassembling, place the components in order for the
convenience of assembly.
Observe the following issues:
a. Before conducting the electrical work, remove the negative pole of
the cable from the accumulator terminal.
b. When it is necessary to remove the accumulator for checking or
maintenance, the cable shall be removed from the negative pole
(
) connected to the car body.
c. In order to avoid the damage of accumulator terminal, when removing
the cable, loosen the terminal nut, then pull the cable upwards
vertically, do not twist or pry it.
d. Please use cleaning cloth to clean the accumulator terminal. Do not
use file or other similar tools, which may scuff them.

Engine
For the structure and main technical parameter of engine see Table 2.
Table 2 Structure and main technical parameter of engine

Serial No. Item Specification and parameter
1 model 4G64S4M
2 style 4-cylinder, straight-line, water-cooling, single top
cam shaft, 4-stroke engine
3 Fuel oil supply method Multi-point fuel oil injection(MPI)
4 Measuring method of inlet capacity Speed compact style
5 Combustion room style Single-slope roof
6 Cylinder diameter × stroke(mm) 86.5×100
7 Total displacement (L) 2.351
8 Compression ratio 9.5:1
9 Max. power and corresponding speed (kW/r/min) 93/5250
10 Max. torque and corresponding speed (N·m/rpm) 190/2500
11 Min. fuel consumption (g/kW·h) ≤254
12 Idle stable speed(r/min) 750±30
13 Idle-speed control Electronic closed loop control
14 Mean piston speed(m/s) 17.5
15 Mean effective pressure (kPa) 1036
1 6 C y l i n d e r c o m p r e s s i o n p r e s s u r e : i n 250r/min (kPa) 1 3 2 0
17 Ignition sequence and control 1-3-4-2; without distributor block, electronic
controlled direct ignition
18 Spark plug gap(mm) 1.0～1.1
19 Spark plug model BKR5E-11 or K16PR-U11 or RC10YC4
BKR6E-11 or K20PR-U11 or RC8
20 Manufacturer of spark plug NGK or DENSO or Xiang huo ju
21 Valve clearance(mm) 0(hydraulic column )
22 Port timing: Opened inlet/closed inlet
Opened outlet/closed outlet 18 °before upper stop point/ 53 °after lower stop
point
50°before lower stop point/ 18 °after upper stop
point
23 Lubrication method Combined method of pressure and splash
24 Pressure of engine oil of main oil channel, in idle
speed of 3000rpm (kPa) (≥78.5)/(245-490)
25 Max. engine oil temperature(℃) 130
26 Consumption ratio of engine oil(g/kW·h) 2

Overview of the entire car-5
The friction, disc, single-diaphragm spring clutch, hydraulic control mechanism. The external diameter of friction disc D=225mm,
internal diameter d=150mm, material is F810.
Adjustment of clutch pedal:
1. Measure the height of clutch pedal (from pedal pad surface to floor) and free stroke of clutch pedal (fork bar pin clearance).
Standard height of clutch pedal: flush with the brake pedal, free stroke of clutch pedal is 5-15mm;
2. Readjust the free stroke of pedal after adjust the height of pedal; rotate the push bar to the standard value, then fix the bolt
and nut;
3. If the free stroke of clutch pedal is not within standard value, it should rotate the adjusting bolt to standard value, then fix
the bolt and nut. Do not move the push bar to main cylinder when adjust the free stroke of pedal;
4. If the free stroke of clutch pedal and clearance between the clutch pedal and floor when the clutch is disengaged de not
consist with the standard, this may by caused by the air in hydraulic system and failure of main cylinder or clutch. It can
discharge the air of system or dissemble and inspect the main cylinder or clutch.
Table 2 Structure and main technical parameter of engine(continued)

Serial No. Item Specification and parameter
27 Consumption ratio of engine oil and fuel oil
(%) ≤0.8
28 Cooling method Closed forced water cooling
29 Starting method Electric motor
30 Net weight(kg) 167
31 Outline dimension: L×W×H (mm) 730×653×667
32 Idle-speed emission CO(%)/HC(ppm) ≤0.5/≤100
33 Emission control degree of operating
condition regulation With three unique catalytic converter, air-fuel
ratio closed loop control, the equipped light
car meets the standard of GB 18352.2－
2001

Air inlet system
Dry-type air cleaner.
Exhaust air system
Primary muffler, with two-stage three-way catalyst device.
Fuel supply system
Adjustment of accelerator pedal
The stroke of accelerator pedal is 155mm; adjust the adjusting nut on wire bracket if it does not consist with the standard.
The fuel tank is plastic tank with capacity of 67L; the oil supply control is the mechanical pedal oil control and
internal-type electric fuel pump; the type of fuel evaporation is the activated carbon can and electric valve control.
Cooling system
Forced circulation water cooling, electric fan and aluminum tube radiator.
Clutch

Overview of the entire car-7
Suspension
The front suspension is the torsion bar spring, double-cylinder inflatable hydraulic damper, transverse stabilizer rod, double
cross-arm independent suspension. The distance between the center of front shaft of lower arm fixing nut and level ground is
295mm±1mm.
The rear suspension is the four-connecting rod, coil spring, double-cylinder inflatable hydraulic damper, transverse stabilizer
rod, no indep endent suspension.
Carriage
Peripheral trapezoidal structure; welded by two box section longitudinal beams and several box or tube section cross beams.
Steering system
Pinion-and-rack power steering-gear, hydraulic assists steering. Breakaway front steering trapezoidal structure. Diameter of
quadriradistus steering disc φ380mm, adjustable angle, power-absorbing steering pipe. For main technical parameters of
steering s ystem refer to Table 5.
Table 5 Main technical parameter of steering system
Serial No. Item Parameter Serial No. Item Parameter
1 wheel camber 0°±30′ 6 Rotary round of
steering disc n 3.64
2 kingpin inclination 12°30′±30′ 7 Angle drive ratio of
steering system i0ω 18.2
3 kingpin castor 3°30′±30′ 8 Force drive ratio of
steering s ystem i0p 198.0
4 toe (mm) 0～2 9 Normal efficiency of
steering gear η+ ≥75%
5 Steering angle of
internal and external
wheel (°) 32/28 10 Revers e efficiency of
steering gear η- ≥60%
1．Adjustment of .4-Wheel Alignment
Test and adjust the front wheel alignment value and adjust the toe on the 4-Wheel Alignment meter.
a. Adjustment of kingpin castor: The standard value is 3°30′±30′(adjust the difference of left and right kingpin
castor to within 30′);
b. Adjustment of toe: The toe with standard value of 0～2mm is adjusted by rotating the steering cross rod. When adjust
the toe, it should rotate the cross brace in left and right side evenly. Tighten the lock nut after adjustment, the torque is
55 - 65N·m.
c. Centering and fix of steering wheel: according to the display of the alignment gauge, turn the front wheel to right
ahead, after removing the steering wheel without changing the position of steering lever, mount the steering wheel
with center aligned, the radials of the steering wheel shall be in the bilateral symmetry position, and the symbol of
Great wall on the steering wheel shall be in the confrontation position of the driver, tighten the nut, with a tightening
torque of 25 - 35N·m.
Left wheel left steering: 32, right wheel left steering:28;
Left wheel right steering:
28, right wheel right steering: 32;
b. Under the light condition of the car, the height between the center of front axis fixed bolt of the lower suspension arm to the
ground is 295
1mm, if the dimension is not within this scope, reach it through adjusting the torsion bar adjustment arm
bolt;
c. The reference dimension of the height of the car is : the left and right deviation is less than 10mm;
3. Checking the free gap of steering wheel:
Turn the orientation of the car to front, stop the engine, exert a force of about 4.9N on the steering wheel along the circumferential
direction to make the it turning to the left, there is resistance force, stop turning when the resistance force is growing; then turn
the steering wheel to the right, stop turning when the resistance force is felt to be growing; the radian value that the external edge
of steering wheel runs is the free gap of the steering wheel, its standard value shall be less than or equal to 20
, and the corner
from the central position to the left or right shall be no larger than 10.

Brake system
The front wheel brake is ventilation coil type, the rear wheel brake is disk and drum type. The service brake type is that the double-
loop vacuum assist hydraulic brake is applied on the front and rear disc brake. The parking brake is mechanical dragline acting on the
drum brake of the rear wheel.
The free stroke of brake pedal is 20mm
30mm, and the operating stroke of the pedal is 120mm. The operating stroke of the brake
handle is 17
(3 teeth)30(8 teeth).
1. The adjustment of brake pedal
Measure the operating stroke of the brake pedal, the standard value is 120mm. When the eighth is no in compliance with the
requirement, make adjustment according to the following procedures:
a. Separate the brake lamp switch wire connector, loosen the blocking nut, and turn the brake lamp switch to the position that the
stopper is not touched;
b. Unscrew the blocking nut of the operation connecting rod, use the thinnose pliers to turn the operation connecting rod, adjust
the brake pedal height to standard value, after reaching the standard value, tighten the lock nut;
c. Turn the brake lamp switch to the position that the stopper of brake pedal is just touched, continue the turning for 1/2
1 circle,
and tighten the blocking nut;
d. Connect the brake lamp switch wire connector;
e. The brake lamp should not be light when the brake pedal is in release status.
2. Standard value of brake pedal free stroke: 20-30 mm
a. Under the stopping status of the engine, step on the brake pedal for 2
3 times, clear the influence of brake assistor, then use
hand to push the brake pedal to the position that there is resistance, measure the amount of movement (free stroke). It shall
be in compliance with the regulation of standard value;
b. If the gap is less than the regulation value, check to see whether the gap between the carrier rod of brake lamp switch and the
brake pedal is in compliance with the regulation. If this gap is exceeding the regulation, it means that the gap between the drive
rod clevis pin and the brake pedal arm is exceeding the regulated value.
3. Start the engine, step down the brake pedal with a force of about 700N,ehck the main brake pump, whether there is oil
leakage on the connection positions of the brake pipeline. If there is, maintain it.
4. Operating status test of brake assistor
Conduct the operation status test of the brake assistor according to the following methods:
a. Start the engine, stop if after operating for 1
2 minutes. Step on the brake pedal for several times with normal force. Expect
that the pedal can be fully stepped down a the first stepping, the height of the brake pedal shall be raised on and on with the
stepping, thus means that the brake assistor operates normally, if the height of the pedal is not changed, it means that the brake
assistor is damaged;
b. Under the stopping status of the engine, step on the brake pedal for several times, confirms that the height of brake pedal is
elevated on and on, under the status that the brake pedal is stepped down, start the engine. At this time, the brake pedal will
move down a bit, it means that the brake assistor is working normally. If the brake pedal is moving upwards, it means that the
brake assistor is damaged;
c. Under the operation status of the engine, step down the brake pedal to stop the operation of the engine. AT this time, the there
shall be no change of the height of brake pedal within 30 seconds, it means that the brake assistor is working normally. If the
brake pedal is moving upwards, it means that the brake pedal assistor is damaged.
5. Adjustment of the parking brake system:
a.For positioning, pull the brake bar to the limit position for over 3 times, use a force of about 400N to pull the brake parking
lever, count the number of knocking teeth. The standard value of stroke of parking brake : 17
(3 teeth) 30(8 teeth);
b.If the stroke of brake parking lever is too big and not in compliance with the requirement, adjust it with the following methods:
Loosen the brake parking lever, unscrew the adjusting nut.
Remove the adjuster hole cap from the brake assembly, use screwdriver to turn the adjustor in the arrow direction to the limit
that the brake drum cannot turn.
Rotate 5 teeth in the counter arrow direction.
Rotate the adjusting nut, adjust the brake parking lever stroke to the standard value.
c. If the stroke is less than the standard value, unscrew the adjusting nut to make it reach the standard value.
d. Check to see whether the adjusting nut and the rod are loosened, whether the adjusting nut is fixed in the fixed seat.
e. After adjustment, jack up the rear part of the car. Loosen the brake parking lever, the brake disc shall not be dragged when
checking the rear wheel.
f. The breaking in of the parking brake: use the force of about 200-250N to pull the brake parking lever,drive the car for about
400m with a speed of about 60km/h, repeat for 2-3 times, then test on the slope of 30%, the car shall be able to be parked.

Fuel supply system
N m: specified torque
adjustment nut
throttle pull wire
accelerator pedal assembly
carbon tank exhaust rubber tube
snap fitting
steel strip type elastic hoop
generator oil-in rubber tube
generator of return rubber tube
soft tube fixing clipper
carbon
tankcarbon tank
air inlet
rubber tubeb type
worm drive
type hoop
vaporizer tube 2
back part of fuel tank
oil-out tube
back part of fuel tank
oil return tubefuel filter
filter rubber tube
for gas out
hard tube bracketvaporizer soft tube 2 cleaner bracket
filter rubber
tube for gas-in
fuel tank vaporizer
rubber tube
front part of the oil-out
tube of fuel tank
vaporizer soft
tube1vaporizer tube1
fuel tank gland the middle connection rubber
tube of the oil return tube
front taps of fuel tankfuel pumpfuel tank gland
fuel tank protection plateseal packing
ringfuel tank assembly
fuel tank oil return tube
fuel tank lock
refill opening cushion
pressing board
refill opening cushion
oil filing port assembly
steel strip type elastic hoop
fuel tank protection plate

Caution: When maintaining the fuel supply system, if the oil
path needs to be removed, the pressure of the fuel system must
be released to avoid the ejection of high pressure fuel.
Disassembly of the fuel tank
1. First remove the oil-in and oil return hard tube of the
generator, the oil return hard tube of fuel tank, and the
connection rubber tube between the back parts of hard vaporizer
tube. Release the pressure of oil path system slowly, block the
joints with cotton cloth, lest there is ejection of high pressure
oil.
2. Remove the oil filling port at the back of the fuel tank and the
clip of the connection rubber tube of ventilation tube, there are
two clips altogether.
3. Remove the bolts fixing the fuel tank, there are 6 bolts
altogether;
4. Remove the oil-in and oil-out tube from the fuel tank, remove
the vaporizer tube joints and line bundle connector;

Clutch-2
Troubleshooting

failure cause inspection content
Shift difficulty or can not shift
Large free stroke of clut ch pedal clutch Pipe
has air
Failure of clutch cylinder
Failure of clutch master cylinder
The installation position of clutch disc is not
in position; large deviation; oil on the friction
lining or broken
The clutch disc is dirty or with foreign
material
Failure of clutch cover Adjust the free stroke of pedal
Discharge the air in clutch system
Replace
replace
Inspect the clutch disc; replace
Repair if necessary
Replace
Disengagement of transmission The clutch guide bearing is worn. Replace the guide bearing
Slide of clut ch
insufficient free stroke of clutch pedal
oil on the clutch disc friction lining or broken
failure of press disc
separation rocker arm assembly is blocked Adjust the free stroke of pedal
Inspect the clutch disc and replace it
Replace the clut ch cover
Check the separation rocker arm assembly
clutch clamping
stagnation/vibration oil on the clutch disc friction lining or broken
failure of press disc clutch membrane spring
is bend
loose of engine bracket Inspect the clutch disc and replace
Replace the clut ch cover
Correct the clutch membrane
Repair if necessary
Soft of clutch pedal clutch pip e has air
failure of clutch cylinder
failure of clutch master cylinder Discharge the air in clutch
replace
replace
Loud noise of clut ch
Component in clutch housing is loose
Throw-out bearing is worn or dirty
guide bearing is worn
separation rocker arm assembly or pull-rod is
blocked Repair if necessary
replace
replace
Repair if necessary

Clutch-5
Removal of clutch master cylinder, clutch cylinder
1. Use the No. 16 open-end wrench to remove the hose connecting
bleed bolt, use the cloth to cover the oil outlet of auxiliary pump
to avoid the splash of 0brake fluid; step on the clutch pedal for
several times to drain the clutch.
Cautions for installation of clutch operation device:
1. Installation of clutch hard pipe : Check the hard pipe for
deformation, check to see whether the curling at the port of
connection pipe is complete and without damage, if there is no
problem after confirmation, it can be installed and fixed in the
front wall clip and hard-tube clip.
2. Coat each rotary parts of peal with the lithium base grease.
3. Check the surface of clutch hoes, no surface cracking, oil leakage
and dog leg is allowed, use the split washer and spring clip to fix
the clutch hose on the support frame of car body.
4. Connect the joints of the general pump oil pipe and the general
2. Remove the split pin and cylinder pin connected the master
pump connecting fork to the pedal; use the No. 13 socket spanner
to remove two nuts Q32008 which is used to install the master
pump. Check the clutch master cylinder, replace the complete
master pump if the internal of master pump has the abnormal
noise and damage of leakage etc.
pump and sub pump according to the required tightening torque.
5. The air in the clutch oil path needs to be exhausted after filling
oil (except the vacuum filling): step on the clutch pedal after
fillingthe oil tank, when feeling difficult in stepping, use the
open-end wrench with specification of 11 to loosen the air bleed
plug screw to exhaust the air, then tighten the plug screw,
repeat the operation for several times. Tighten the air bleed
plug screw of the sub pump when there is no foam in the
flowing oil liquid. Supplement the oil of the oil tank to the
level between the Max and the Min.

Clutch-6
Clutch
4. Disassembly procedure:
a. Clutch cover assembly, clutch disc assembly
b. Profile spring, throwout bearing assembly
c. Dustproof cover, separation rocker arm assembly
d. Separation rocker arm ball support
Warning: When maintaining the clutch assembly, it is now
allowed to use the sand mill or dry brush and compressed air for
cleaning, lest there is powder (use wet cloth). The clutch disc
has the “asbestos fiber”, if there is powder scrap during
maintaining, the asbestos fiber in the powder scrap will floats in
the air, when human inhales the air containing the asbestos
fiber, it will cause great damage to human health.
Removal of clutch assembly
1.Remove the transmission
Remarks: Do not dry the transmission oil.
2.Remove the clutch cover and clutch disc
a. Make the alignment mark on the clutch cover and flywheel
b. Remove the fixed bolt gradually, until release the tension of spring
c. Remove the fixed bolt, pull out the clutch cover and clutch disc.
3. Remove the bearing and separation fork form the transmission
a. Remove the clip and pull out the bearing .
b. Remove the separation rocker arm assembly and leather cup.
clutch disc assembly
clutch cover assembly
bolt, spring and
washer assembly release bearing
assembly
profile spring
separation rocker arm assembly
separation rocker arm ball support
leather cup
N m: specified torque