PRONAR T185/1, Руководство пользователя, Страница: 117 / 156

Chapter 5
5.15
PRONAR T185/1
Periodic inspections
5.12 INSPECTION OF WHEEL 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 jamming.
• Turn the wheel so that it rotates very
quickly, check that the bearing does
not make any unusual sounds.
• Try to feel looseness by moving the
wheel.
• Repeat the steps for each wheel se-
parately, remembering that the jack
must be on the opposite side of the
wedges.
• If looseness is felt, adjust the be-
arings. Unusual sounds emanating
from a bearing can be symptoms of
excessive wear, dirt or damage. In
this case, the bearing, together with
the sealing rings, should be replaced
or cleaned and regreased.
• When checking bearings, make
sure that any perceptible looseness
comes from the bearings, not the
suspension system (e.g. play on the
spring pins, etc.).
• Check the technical condition of the
hub cover, replace 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 5.10 Looseness check