PRONAR T046H, User Manual

Page: 83 / 116

Chapter 5
5.13
PRONAR T046H
Periodic inspections
5.10 CHECKING THE CLEARANCE OF THE AXLE
BEARINGS
• Raise the wheel with a jack.
• Turn the wheel slowly in two direc-
tions. Check that the movement is
smooth and the wheel rotates without
excessive resistance and jams.
• Turn the wheel so that it rotates very
quickly, check that the bearing does
not make any unusual sounds.
• Try to feel looseness during moving
the wheel.
• Repeat this action for each wheel
separately, remembering that the
jack must be on the opposite side of
the wedges.
• If looseness is felt, adjust the
bearings. Unnatural sounds coming
from the bearing may be symptoms
of excessive wear, dirt or damage.
In this case, the bearing together
with the sealing rings should be re-
placed or cleaned and regreased.
When checking bearings, make sure
that any noticeable looseness comes
from the bearings, not the suspension
system (e.g. looseness on the spring
pins, etc.).
• Check the technical condition of the
hub cover, replace with a new one if
necessary.
I.3.4.622.12.1.EN
ADVICE
Damaged hub cover or lack thereof will cause the
penetration of dirt and moisture into the hub, which
will result in much faster wear of bearings and hub
seals.
Bearing life depends on trailer operating conditions,
load, vehicle speed and lubrication conditions.
526-I.10-1
Figure 5.8 Clearance inspection