Dongfeng DFA1101GZ5AD6J-907. Manual - part 45

Front Axle

FA-5

Shoe shaft end: 0.25~0.45mm;

Cam shaft end:  0.40~0.70mm, the clearance should be corresponding and the clearance difference between

the upper and lower shoe is ≤ 0.1mm.

Trouble Analysis

Trouble

Cause

Method

Wheel hub bearing is 
stugnant

Big pretightening force of the wheel hub 
bearing

Adjust pretightening force

Bearing lack of lubricating or improper 
grease

Add or replace the grease

Dust on the bearing

Clean and add some grease

Insufficient brake force

Cam shaft turns inflexibly

Check the cam for its working condition

Improper adjustment of the brake air 
chamber push rod travel

Adjust travel

Friction plate overheated or deterioration

Replace friction plate

Improper connceting condition of the 
friction plate

Correct the joint position of friction 
plate

Water enterred the brake drum

Press down the brake pedal during 
running to exhaust the water

Grease on the connecting face of the 
friction plate or the brake drum

Cleanup the grease or replace friction 
plate

Abnormal noise while 
braking

Friction plate worn and rivet appeared

Replace friction plate

Friction plate surface hardening or deterio-
ration

Replace friction plate

Brake drum uneven worn or loose installed Correct brake drum or tighten the bolt
Brake shoe and friction plate connected 
loosely

Replace rivet

Brake shoe fixed pin loosed

Tighten fixed pin locking screw

Wheel hub bearing worn

Replace wheel hub bearing

Brake drum distortion

Replace brake drum

Wheel unsmooth

Cam shaft lack of lubricating or adjusting 
arm doesn't return

Add grease or correct troubled parts

Return spring of the brake shoe or air 
chamber broken or fatigue 

Replace troubled parts

Steering wheel heavily 
manipulated

Improper adjustment of the wheel 
alignment

(too big caster) Check and adjust

Too big clearance between kingpin and 
bush

Check and adjust the clearance

Thrust bearing installed on the contrary

Correct the installation

Front axle lacks of lubricating

Add some grease

Ball connecting overtighten or too loose

Check and lubricate ball head pin

Front Axle

FA-6

Pendulate

Front wheel hub bearing worn

Replace wheel hub bearing

Kingpin and bush overworn

Correct or replace troubled parts

Steering knuckle distortion

Replace

Improper wheel alignment

Check and adjust 

Pulling to one side

Improper wheel alignment

Check and adjust 

Front axle bent

Correct or replace

Brake unsmooth

See the relative brake items

Front wheel hub bearing nut loosed

Tighten accord to the required torque

Tire unevenly worn or 
earlier worn

Improper wheel alignment

Check and adjust

Wheel hub bearing worn or damaged

Replace wheel hub bearing

Bearing nut loosed

Tighten accord to the required torque

Ball pin, kingpin and bush overtightened or 
slackened

Correct or replace the troubled parts

Front Axle

FA-7

Appendix 1  Lubricating Parts and Lubricant

Lubricating parts

Lubricant

Appendix 2  Tightening Torque of the Bolts and Nuts

Item

Maintenance Interval Mileage ( × 1000km)

First maintain

4

8

12 16 20 24 28 32 36 40 44 48

Steering knuckle kingpin

●

● ● ● ● ● ● ● ● ● ● ● ●

Tie rod ball pin

●

● ● ● ● ● ● ● ● ● ● ● ●

Wheel hub bearing

●

●

●

●

●

Adjusting arm

●

●

●

●

Cam braccket

●

●

Part

Lubricant

Type

Steering knuckle kingpin

lithium grease

2# 

Tie rod ball pin

lithium grease

2# 

Wheel hub bearing

lithium grease

2# 

Adjusting arm

lithium grease

2# 

Cam bracket

lithium grease

2# 

Part

Tighten Torque (N.m)

Steering draglink arm nut

120~140

Nut of the left and right steering knuckle arm

120~140

Front brake bottom plate bolt

140~170

Air chamber bracket fixed bolt

55~70

Air chamber fixed bolt

55~70

Pin lock nut

55~70

Steering limit bolt locking nut

80~100

Steering ball pin nut

130~160

Tie rod clamp nut

40~60

Front adjusting nut

120~150

Kingpin plug cover screw

40~60

Front Axle

FA-8

Appendix 3  Main Adjusting Data and Maintaining Standard

 

Main adjusting data

Maintaining Standard

                 Adjusting Item

                            Adjusting Data

Toe-in

0~4mm

Turning angle of the inside wheel

40°

Clearance between front axle fist surface and 
the steering knuckle

≤

0.1mm

Clearance between front fiction plate and brake 
drum

Shoe shaft end  0.25~0.45mm
Cam shaft end  0.40~0.70mm
Clearance difference between two shoes of the same side is 
＜

0.1mm

             Item

Maintaining Standard

       Wear Limit

            Remark

Outside diameter of kingpin

31.9~32mm

31.9mm

Clearance between kingpin 
and steering knuckle bush

0.025~0.077mm

0.20mm

Clearance between kingpin 
and front axle hole

0.01~0.052mm

0.10mm

Clearance between steering 
knuckle and front axle

≤

0.05mm

0.15spacer adjustment

Starting force of steering 
knuckle

≤

10N

Measure at cotter pin of 

shaft head

Starting force of front wheel 
hub

20~50N

Measure at the bolt of 

wheel