PRONAR T683P, User Manual

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Pronar T683P CHAPTER 5
5.4
Place blocking chocks under the trailer wheel that will not be lifted. Ensure that
the trailer will not roll during inspection.
Raise the wheel (located on the opposite side of the placed wedges).
The jack should be placed between the U bolts (2) - - figure (5.1)
securing the axle (1) to the leaf springs. The recommended support
point is marked with an arrow. The jack must be suited to the trailer
weight.
Checking the clearance of the axle bearings
Turn the wheel slowly in two directions to check if 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 by moving the wheel.
You can use the lever under the wheel, resting the other end on the
ground.
Repeat checks 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 replaced 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.).
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.