Great Wall hover, Service Manual

Page: 16 / 425

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 independent 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
φ
380mm, adjustable angle, power-absorbing steering pipe. For main technical parameters of
steering system 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 i
0
ω
18.2
3 kingpin castor 3
°
30
′±
30
′
8
Force drive ratio of
steering system i
0p
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
Reverse 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.