Edition 2 Chapter 2 Page 2-16
Feb/2013 Troubleshooting
2.11 FRONT / REAR AXLES
Table 2-11
Part Problem Cause Remedy
Front / Rear Axles
Unusual noise
a) Noise sounds like (si) during speed
increase or decrease. Gears do not
interconnect correctly(clearance of
gears too small or poorly aligned).
Adjust the clearance
or alignment
b) New gear poorly meshed Monitor after
breaking-in
c) Noise sounds like clash on
descending gradients or while
speed changes quickly. The Noise
fades away or decreases during
usual movement: clearance
between gears too large.
Adjust or replace gear
d) Continuous noise when the crane is
in motion. The noise increases with
the speed. But when noise fades
away or decreases during sliding:
the bearings (hub, main reducer or
differential) are worn or too loose.
Adjust or replace
bearings
e) Gear oil level too low or oil viscosity
does not agree with requirements.
Add oil to the correct
level or replace the oil
with the correct type
f) No noise during straight traveling,
but the noise sounds during turning
caused by excessively large
clearance of bearings on both sides
of reducer or worn differential gear
or thrust bearing shim.
Adjust or replace
Heat
generation
a) Bearing installed too tightly.
Meshing clearance too small.
Adjust
b) Oil level too low Add oil to the correct
level
c) Lubricant viscosity too low Replace with the
correct type
Oil leaks
a) Oil seal defective Replace
b) Axle journal worn Replace the damaged
one
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