Dongfeng DFA1101GZ5AD6J-907. Instruction - page 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