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Pronar T286
Checking slackness of wheel axle bearings
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.
Turning the wheel try to detect slackness.
Repeat procedure to each wheel individually, remembering that the jack must
be on the side opposite to the chocks.
If slackness is felt, adjust bearing. Unusual sounds coming from bearing may be symptoms of
excess wear, dirt or damage. In such an event the bearing, together with sealing ring, should
be replaced with new parts, or cleaned and greased again During inspection of bearings
ensure that possibly detected slackness comes from the bearing and not from the
suspension system (e.g. slackness of leaf spring pins etc.).
TIP
If hub cover is damaged or missing, contamination and dampness enter the hub, which
causes significantly faster wear of bearing and hub seals.
Bearing life is dependent on working conditions of trailer, loading, speed of travel and
lubrication conditions.
Check condition of hub cover, if necessary replace with new cover. Inspection of bearing
slackness may only be conducted when the trailer is hitched to tractor and the load box is
empty and not raised.
Check wheel axle bearings for slackness:
You may use a lever placed under the wheel supporting the other end
on the floor.
• after travelling the first 1,000 km,
• after intensive use of trailer,
• every six months use or every 25,000 km.
5.6
SECTION 5
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