2006 GREAT WALL HOVER 4WD

2. Operation of 4WD
The operating auxiliary steering column can be shifted to 4WD status.
For position of auxiliary steering column and corresponding operating
condition refer to table.
3. Caution for operation:
a. Do not use 4WD in good surface, otherwise the tyre and components
of drive system will be damaged easily and increase the consumption
of fuel, and cause the noise of drive system.
b. Please run in 1st-Gear under “4L” gear position when run in very
low speed in field.
Operating instruction of transmission SC5M4D-C
1.The schematic diagram of transmission operating gear position
is on the handle of steering column.
During the process after vehicle is started and in traveling, it must
step the clutch pedal to bottom before the shifting. If need shift from
5
th-Gear to reverse-Gear, it should move the shifting bar to the neutral
position of 3rd/4th-Gear. Shift to R-Gear after stop the vehicle stably,
otherwise, it can not shift.
During the traveling process. It should always pay attention to the
shifting to make the vehicle matches to the speed of engine. The
correct shifting can improve the economical efficiency and prolong
the service life of engine. Do not shift from high-Gear to low-Gear on
the condition that the pointer of tachometer may enter into red area,
otherwise, the engine will be damaged.
Warning: Do not shift to reverse-Gear when the vehicle moves
forwardly, otherwise the transmission will be damaged.
hand hall of main steering column
hand ball of auxiliary steering column
Auxiliary steering
column position drive Operating condition
2H 2WD Use this gear position when run in the general railway and high speed highway.
4H High speed 4WD Use this gear position when run in the deep snowland, sand ground or uneven road
in normal speed.
N Neutral gear When use the gear position during using of winch, it could not drive the vehicle.
4L Low speed 4WD Use this gear-position when run in uneven road such as mud land or climbing or
downward （especially when need increas e the power）.

Automatic transmission-5
Table 2.1 Gear selection and its function
Gear selection function
1st-Gear
(manual 1
st-Gear ) The first gear is using for climbing and braking. It is a function which limits the speed of
the car. The speed limitation by engine is realized by reduce the opening degree of
throttle position.
2nd-Gear (automatic, manual
2
nd-Gear) In economic mode, it can process the 1
st and 2nd shifting operation when engage the 2nd
–Gear. The limitation of vehicle speed by engine is realized through reducing the
opening of throttle position. in 4WD 4 high, , the transmission will maintain 2
nd-Gear
position The manual mode and winter-Mode will only maintain 2nd-Gear 。
3rd-Gear
(automatic, manual 3rd-Gea) In economic mode and dynamic mode, it can process the shifting operation of 1
st, 2nd
and 3rd-Gear when engage the 3rd-Gear, and can reaches the very high vehicle speed. At
this time the locking clutch can process the locking action, refer to vehicle user manual.
The limitation of vehicle speed by engine is realized by reduce the opening of throttle
position. In 4WD 4 low, the transmission should be maintained in 3
rd –Gear position.
Under manual mode, the transmission will be kept in 3rd-Gear.
D-gear
(drive) It can process the 1
st, 2nd, 3rd and 4th –Gear position operation and gear-shifting operation
of (1-2), (1-3), (2-3), (2-4), (3-4), (4-3), (4-2), (3-1) and (2-1). This shifting operation is
processed by taking the vehicle speed, throttle position, throttle position switching
frequency (or forced Gear-decreasing) as the parameter. The locking clutch can process
the locking action in 3rd –Gear, 4
th-Gear according to the type of vehicle. Refer to user
manual of vehicle.
N-Gear
(neutral gear) Only the rear brake belt is engaged at this time. It determines whether the function can
be realized according to the vehicle speed, engine speed and throttle position. But the
gear-position sensor allows the starting of engine. Allow the slide of N-Gear.
R-Gear
(reverse gear) Set the anti-misoperation in forward function according to the vehicle speed, engine
speed and throttle position opening to realize the reverse operation. The gear-position
sensor can start the revers e lamp.
P-gear
(parking gear) Only the rear brake belt is engaged at this time. The function can be determined
according to the vehicle speed, engine speed and throttle position. The output shaft of
transmission is locked. The gear-position sensor can start the engine.

Automatic transmission-26
Power transmission
Introduction
It has the following power transmission pointed to different Gear-position:
power transmission N-Gear and P-Gear
power transmission R-Gear
power transmission manual 1
power transmission Automatic 1st-Gear
power transmission Automatic 2nd -Gear
power transmission Automatic 3rd -Gear
power transmission Automatic 3rd-Gear locking
power transmission Automatic 4th -Gear (overspeed -gear)
power transmission Automatic 4th -Gear locking
For description of each kind of power transmission condition, refer to following parts.
Table 5.1 describe the on-off condition of each unit in all gear condition.
Name of participated unit
Position C1 C2 C3 C4 B1 B2 1-2
OWC 3-4
OWC LU
clutch
Parking and neutral position － － － － － X － － －
Reverse － － X － X － － －
Manual 1st -G ear － X － X － X － X
Automatic 1st- Gear － X － － － － X －
Auto 2nd-Gear and manual
2nd -G ear － X － X X － － X － Automatic 3rd –Gear and
manual 3rd-Gear X X － X － － － X － Automatic 3rd-Gear locking
and manual 3rd-Gear
locking X X － X － － － X X
Automatic 4th -Gear
(overspeed -gear) X X － － X － － － －
Automatic 4th -Gear locking
X X － － X － － － X
In P-Gear or N-Gear, the planetary gear assembly has not the drive. The rear brake belt is used to eliminate the voice generated in
engagement with reverse gear and increase the application of 4WD. It is without the engagement of clutch and brake belt.
In parking-Gear, the locking of mechanism is realized through the engagement of brake lever installed on housing and tooth of
output shaft gear ring.
Control
In stabl
e status, to maintain the arrangement, the status of solenoid valve and valve is shown as follows:
solenoid valve S1 and S2 is powered off.
The line (pump) pressure is applied on the primary regulating valve (PRV) and electromagnetic supply valve.
The torque converter, oil cooler and lubrication loop are filled up with the transmission fluid from the primary regulating
valve.
The line pressure 500 loop is filled up with the transmission fluid from the electromagnetic supply valve.

S5 will be filled up with the transmission fluid through the variable pressure

egulating valve (S5) .
The line pressure is prohibited form entering into the drive loop through the manual-operated valve .
B1 loop and all clutch loop are opened to drainage port.

Caution:
Do not take out the central support by knocking the output shaft , otherwise, it will damage the surface of thrust bearing
permanently
o. Remove the central support, 1-2 one-way clutch and planetary gear block.
p. Use the T40 special tools to remove the parking lever cum disc.
q. Remove the rear brake belt support and rear brake belt.
r. Remove the output shaft assembly.
2. Transmission case
It should follow the following procedure when remove the transmission:
a. Use the tools to take out the fixed pin from one side of cross shaft gear sensor (2WD and 4WD mode).
b. Remove the gear sensor from the case. Use the special tools to take out the cross shaft seal.
c. Take out the circlip from the cross shaft. Pull up the cross shaft and take out the drive pin from the sector gear-position
selection plate.
d. Use the tools, press down the cross-shaft pin and take out the shaft , reset spring and bolt from the housing. Refer to Figure
8.3.
Figure 8.3 Installation and disassembly of cross-axle pinFigure 8.2 central support retainer
i. Use the pump remover to remove the pump, refer to Figure 8.1.
g. Remove the input shaft , front clutch cylinder and overspeed –Gear shaft as an integral. Take it out from the front of housing.
k. Remove the clutch C3 cylinder and central gear .
l. Remove the brake belt support and brake belt.
m. Use the 50 special tools to remove two central support connecting bolts.
n. Remove the central support retainer, refer to Figure 8.2.

connecting housing (4WD)connecting housing
Figure 8.20 planet carrier assembly and central support
eCheck whether the socket has the proper central support, then install the central support on the one-way clutch, ensure the
support can rotate in anticlockwise. Refer to Figure 8.20
f. Use the Vaseline to lubricate the NO.9 needle thrust bearing and thrust washer, and install it on the rear of planet carrier. Refer
to Figure 8.19
g. Install the planet assembly and central support on the box and align the central support installation bolt hole.
h. Install and tighten the central support bolt.
i. Install the ring spring fixing plate; ensure the ring spring is installed in the box correctly.
j. Remove the central support bolt and provide the Loctite243 or similar material for screw; install and tighten the bolt to
specified standard.
6.Ttransmission rear housing assembly
The installation procedure of transmission rear housing assembly is shown as follows:
a. Check the condition of transmission rear housing roller bearing (2WD and Chairman mode), replace it if necessary (rear drive
mode). Install the new bearing form the end of transmission rear housing; only can press the bearing side with mark.
b. Install the new sealing material on the transmission rear housing or adaptor rear housing. Refer to Figure 8.21.
Figure 8.21 Connecting and extension housing
output shaft
o-ring
locking nut
oil seal
needle bearing oil seal
gasket

Caution:
Do not use the Vaseline to fix the washer.
c. Install the transmission rear housing or adaptor rear housing with the new washer.
Caution:
Refer to the description in section 8.3.17 related installation of output flange assembly (rear wheel drive).
d. Install the transmission rear housing (rear wheel drive) or adaptor rear housing (4WD ) and tighten the bolt.
e. Provide the Loctite202 or equivalent sealant to the rear housing or connector and process the installation. Ensure the bolt is
tightened according to the specification. (Refer to Figure 8.1)
7. Front servo assembly
Caution:
Ensure the front servo clamp ring is installed correctly; ensure the ring spring and spark gap points to the bottom. Refer
to Figure 8.22.
The assembly procedure of front servo assembly (Refer to Figure 8.22) is shown as follows:
a. Use the automatic transmission liquid to lubricate the housing O-ring and install it on the housing.
b. Use the automatic transmission liquid to lubricate the housing O-ring and install it on the piston.
c. Install the piston, brake lever, spring, washer, base and fixing ring.
d. Install the piston brake lever assembly on the front servo housing.
e. Install the front servo plug and spring in the box.
f. Install the front servo assembly in the box.
g. Press down the servo housing and install the fixing ring spring of servo housing. Align the spark gap and coil track and ensure
it is installed in the groove properly. Figure 8.22 front servo and brake belt
8. Brake belt assembly
The assembly process of brake belt assembly is shown as follows:
a. Install the reaction reinforcement lever on the housing.
b. Check the brake belt for crack or damage; check the bush and metal back.
c. Install the support retainer on the brake belt (Refer to Figure 8.23).Note that the later transmission modes will not adopt the
support retainer.
Caution:
Place the new brake belt in the automatic transmission liquid for about 5 minutes before install it.

Front axle propeller shaft (4WD) assembly
Rear axle propeller shaft (4WD) assembly
N m: Specified torque
universal-joint forkfront section of
rear axle propeller
shaft
intermediate sup-
port assembly
universal-
joint fork
shimnut
circlip
cross-axle assembly
rear section assembly of
rear axle propeller shaft
flange forkcirclip
cross-axle assembly
axle tube assembly
front axle drive shaft assembly
N
m: Specified torque
universal-joint fork
circlip
cross-axle
assembly
drive shaft axle
pipe assembly
N
m: Specified torqueflange fork

N m: specified torque
Used component which can not be used any more.
precoated component
Front hub and steering knuckle (4WD)
stabilizer bar
flat shim
connecting rod
of stabilizer bar
hub and brake disc
flange
adjusting washer
circlip
hub cap
spring shimdisc brake
split pin
lower suspen-
sion arm
split pin
upper suspension arm
drive shaft
oil seal
needle
bearing
lock washer
steering knuckle
lock nut
lock washer
screw
brake cover
spring shim
flat shim
disk shimShim
fill blockfill block disk shim
oil seal
bearingbearing shock absorber