Dongfeng DFA1063DJ10 (14)-301/303. Manual - part 16

 

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Dongfeng DFA1063DJ10 (14)-301/303. Manual - part 16

 

 

Front Axle

FA-3

Maintenance

Before using new axle, apply enough 2# lithium grease into every grease fitting.

First maintain

To assure the safe running of your vehicle and obtain a long service life, you have to do the first maintain

after the first 1,500~2,500kmafter leaving factory. Please note the following items:

1.Dismantle and check the wheel hub for any abnormal wear (please go to the Assembly and Adjustment to see

the reference)

2.Check the fastening piece.

Periodical maintain

Do the periodical maintain for the vehicle is a good way to prolong the service life and assure the safe run-

ning of the vehicle. If you follow the maintenance schedule to do the maintain, your vehicle may obtain the best
economic benefit.

The items of the periodical maintain are as following:

1.Add some grease to the grease nipple

2.Avoid important nut loosed

3.Adjust wheel hub bearing pretightening force and toe-in

4.Adjust the brake clearance

Periodical Maintain Schedule

Item

Maintenance Interval Mileage ( × 1000km)

First maintain 4

8 12 16 20 24 28 32 36 40 44 48 80

Clean the axle assy

● ● ● ● ● ● ● ● ● ● ● ●

Check the important nut for its tightness

● ● ● ● ● ● ● ●

Clean and adjust wheel hub bearing

Check service brake and park brake 
efficiency

● ● ● ● ● ● ● ● ● ● ● ●

Check the brake bottom plate for tightness

Clean the brake air chamber

Check brake pipeline for leakage

● ● ● ● ● ● ● ● ● ● ● ●

Front Axle

FA-4

Assembly and Adjustment

Disassemble and asseble of the assembly

Front wheel hub brake drum assembly

1.Fixed the front axle and remove the wheel hub end cover;

2.Take off the cotter pin, adjusting nut and spacer;

3.Turn the wheel hub brake drum a little and pull it, gently knock at the brake drum at the same time to loose the

inner ring of the outer bearing, then take down the wheel hub brake drum, but you need to pay attention that the
assembly is so heavy that may be fallen down or hurt someone, and the inner ring of the outer bearing need to
care at the same time, don't fall it.

The assembling sequence of the front wheel hub brake drum assembly is opposite to the above sequence, and

you must to pay attention to the tightening torque of the thread connecting parts and the adjustment of the bearing
pretightening force.

Adjustment of axle

Ajustment of axial clearance between front axle and steering knuckle

1.Installl the steering knuckle and thrust bearing on teh front axle, select the proper adjusting spacer(Note:only

use one) to adjust the clearance and assure the clearance is ≤ 0.1mm;

2.Apply a layer of grease on the surface of the kingpin, align the lock pin slot of the kingpin to the lock pin hole of

the front axle, then insert the kingpin and tighten the lock pin;

3.Before add the grease, measure both left and right of the starting force at cotter pin of steering knuckle journal,

and the starting force should be ≤ 10N.

Adjustment of front wheel hub pretightening force

1.Apply some 2# lithium grease on the thread of the steering knuckle shaft end and the wearproof spacer;

2.Tighten the locking nut by a torque of 120~150N.m;

3.Turn the wheel hub for 2~3 circles to correct the alignment of the bearing;

4.Tighten the locking nut by a torque of 120~150N.m;

5.Unscrew the locking nut for 1/3 circle, install the locking washer and limit spacer, and make the limit spacer

align to the steering knuckle key slot and the adjusting nut limit pin;

6.Install the outer nut, tighten it with a torque of 120~150N.m;

7.Make sure if the pretightening force is correct. First, turn the wheel hub for 2~3 circles, then confirm the tangen-

tial force of the wheel hub bolt;

The tangential force of the wheel hub is 20~50N.

Adjustment of the toe-in

1.First, loose the locking bolt of the tie rod;

2.Turn the tie rod and make the toe-in is 0~4mm at the external diameter of the tire;

3.Tighten the fixed nut of the tie rod, and make the angle between left and right joint is no t larger than 4°, and

the angle of oscillation of the tie rod joint during the largest turning angle must have some over measure.

Adjustment of the steering angle

1.Adjust the limit screw of the turning angle, and make the max.turning anggle of the the inner wheel is 40°;

2.After adjusting the limit screw, tighten the locking nut.

Front Axle

FA-5

Adjustment of the brake clearance

Turn the worm shaft and shoe shaft of the brake adjusting arm, made the surface of the brake shoe totally

connected with the inner face of the brake drum, then loose 3~4 circles of the worm shaft, and adjust the clearance
between brake drum inner face and brake shoe: 

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

Front Axle

FA-6

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

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

 

 

 

 

 

 

 

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