189
5 Troubleshooting
Failure
Possible cause
Troubleshooting practice
Transfer Box
Loud noise
Insufficient oil quantity in
the transfer box
Main and lay shaft axial
movement is big
Fill oil until the oil level check
plug
Adjust the bearings or replace
them by new
Gears self-disengagement
Gear shift clutch and yoke
are wear Gear shift clutch shaft
and spline wear
Replace worn parts
Gears and differential locks
are switched with an effort
Gear, front case, shift sleeve
splines have burrs
Clamper is stuck
Fine the splines surface
Clean the ball hole
Driving Axles
Axle loud noise
Conical gears contact pattern
is displaced to the toe-end tooth
Adjust the coupling according to
the contact pattern
Backlash in gearbox bearing
Restore bearing preload
Gear teeth working surface
wear, damage
Replace the gears
Wheels and Tires
Thread pattern are strongly
and unevenly worn
Steering wheels misalign-
ment
Wheel boss bearings and
swivel member king pin bear-
ings are misaligned
Align the wheels
Adjust the bearings
Tie rod ends joint parts wear
High radial or lateral wheel
wobble
Replace the worn parts by new
Replace wheels with high radial
or lateral wheel wobble
Hard braking or hard move
from a standstill, driving at low
or high tire pressure, tire over-
load with load weight
It is necessary to follow the rules
and rational methods of truck driv-
ing. Strictly comply with the inter-
nal tire pressure norms, do not
overload tires
Summary of Contents for 4320M
Page 1: ...URAL 4320М TRUCK and its Modifications ...
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Page 159: ...156 Figure 123 Engine Electronic Control Unit Wiring Scheme ...
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Page 177: ...Figure 140 Installation of left and right side safety devices 171 ...
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