Rear Axle
RA-6
Adjustment of the rear wheel bearing pretightening force
1.Remove the stop spacer first;
2.Tighten the adjusting nut by a special spanner with a torque of 150~180N.m;
3.Turn the wheel hub 2~3 circles, and make the bearing aligned correctly;
4.Fasten the adjusting nut with a tightening torque of 150~180N.m;
5.Reverse the adjusting nut for 1/8~1/6circle;
6.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 bolt is 30~ 60 N.
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 deteri-
oration
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
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