Dongfeng DFA1101GZ5AD6J-907. Manual - part 18

General Adjustment 

9—7

3.Screw on the bleeding bolt, trample     
down the clutch pedal, then screw off      
the bleeding bolt to exhaust the air in       
the oil, then screw on again and 

 

 

 

 

 

release the clutch pedal.

4.Do the 3rd step repeatedly until there      
is no bubbles come out and you can       
feel the clutch can be disengaged 

 

 

 

 

totally.

Adjustment of Brake Clearance

In normal condition, the brake    

clearance 

is between 0.6mm~0.8mm.

After replace the brake shoe lining,     

you must 

have a completely adjustment to      

the brake 

, the method is as follows:

Use the wrench to first turn the      

adjusting arm worm shaft to achieve     
the full contact of the brake shoe      
surface abd brake drum surface, then     
turn it loose for 1/2~2/3 circle(at that      
time the clearance between the center     
of the fricton lining and the brake drum       
is about 0.7mm), and the brake drum      
hub assembly can turn freely without     
any interface to other parts. 

The spring brake chamber do not     

need maintenance, but examine and    
repair once after 2 years using.

Check: The starting pressure of the     

diaphragm cylinder is 20~30kPa. If the     
pressure rise to 50kPa, you have to      
check  it.  Under  the  condition  of  wheel      
brake in proper adjustment, the dia-     
phram travel should be 1/3 of the possi-       
ble total diaphram travel. At this time,      

General Adjustment

9—8

under the condition of full brake, the      
angle between push rod and brake cam      
adjusting arm is 90°.

The release pressure of the spring     

accumulator should be no more than     
600kPa, and if you find the release      
pressure becomes low, the spring 

 

 

 

accumulator should react immediately.

Note:
When adjusting the push rod, its travel      

should not be over the effective travel.

General Adjustment 

9—9

Brake system

1.Bracket-hose
2.Front-brake chamber
3.Elbow joint
4.Alarmer
5.Parking air tank
6.Wet air tank
7.Drain valve
8.Four-circuit protection valve
9.Unloader valve
10.Air drier

11.Two-way valve
12.Quick-release valve
13.Rear-brake chamber
14.Loading sensing valve
15.Rear air tank
16.Front air tank
17.Electromagnetic valve
18.Exhaust brake valve
19.Quick-release valve

Adjustment of wheel hub bearing

Every  12,000km,  the  wheel  hub    

bearing should be maintained. 

 

 

Dismantle  the  wheel  and  brake  drum,     
clean the wheel hub bearing, then the      
dirt and deteriorative grease in the inner      
hole of the wheel hub. Fill up the space        
between the inner retainer and rollers     
with  the  new  grease,  and  apply  a  coat       
of grease on the bearing surface. Then      
reassemble the wheel hub bearing.

General Adjustment

9—10

Adjustment for the front wheel 

hub bearing

1.Spacer
2.Anti-friction

shim

3.Locking nut
4.Cotter pin
5.Hub cover

Tighten the locking nut with a torque of       

120~150N.m and turn the wheel 2~3 turns      
to ensure the bearing in proper position.      
Then turn back the locking nut about 1/3       
turn to set  the  locating  pin  on  the  locking        
nut align the hole of lock washer, 

if  they        

can not align, turn the locking nut out a        
little until align to the cotter pin.

Adjustment for the front wheel 

hub bearing

Tighten the hub bearing nut with a      

torque of 150~180N.m, in the 

 

 

 

meantime rotate the wheel to set the      
bearing roller in the proper position,     
then loosen the nut for 1/6 turn and set        
the hole on the bearing nut align the       
hole of lock washer. Finally tighten the      
setting  screw,  the  bearing  can  rotate     
freely, no axial play is found.

Note:
Carefully disassemble and reassemble the    

wheel hub avoid to be damage.

Don't lose the outter oil seal retainer.
The inner oil seal should be smeared with       

grease when renewing.

Pay attention to the temperature  of  the      

wheel hub during running in about 10km, after       
adjusting the wheel hub bearing. If the 

 

 

 

 

 

temperature is too high, the bearing will be too        
tight, so the adjustment should be applied.

Adjustment of Free Play of 

Steering Wheel

Check the free play of steering     

wheel every 12,000km, which is under