PRONAR T682, Manual

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Pronar T682, Pronar T682/1 SECTION 5
5.4
Raise the wheel (opposite to the side where chocks are placed).
Lifting jack should be positioned in the place indicated by the arrow in
figure (5.1). Lifting jack must be suitable for machine weight.
Check wheel axle bearings for slackness
Turning the wheel slowly in both
directions check that movement is
smooth and that the wheel rotates
without excessive resistance.
Turn the wheel so that it rotates very
quickly, check that the bearing does
not make any unusual sounds.
Holding the wheel above and below, try
to feel any slackness.
You may use a lever placed under
the wheel supporting the other end
of the lever on the floor.
Lower the lifting jack, relocate the
chocks to the other wheel and repeat
the inspection procedure for the other wheels.
TIP
If hub cover is damaged or missing, contamination and dampness enter the
hub, which causes significantly faster wear of bearings and hub seals.
Life of bearings is dependent on working conditions of the trailer, loading,
ground speed and lubrication conditions.
If slackness is felt, adjust bearings. Unusual noise made by the bearing may be a symptom of
excessive wear, dirt or damage. In such a case, the bearing and sealing ring should be
replaced with new parts (if they are not suitable for further operation) or cleaned and greased
again.
FIGURE 5.2 Check bearings for
slackness