PRONAR T900, Operator'S Manual, Page: 100 / 153

Pronar T900 SECTION 5
5.4
If slackness is felt, adjust bearings. Unusual sounds coming from bearing may be symptoms
of excessive wear, dirt or damage. In such an event the bearing, together with sealing ring,
should be replaced with new parts. 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 bearings and hub seals.
Life of bearings is dependent on working conditions of the trailer, loading, speed of travel
and lubrication conditions.
Check condition of hub cover, if necessary replace it with a new cover. Inspection of bearing
slackness may only be conducted when the trailer is hitched to a tractor and the load box is
empty.
Checking wheel axle bearings for slackness:
•
after travelling the first 1,000 km,
•
after intensive use of trailer,
•
every six months use or every 25,000 km.
DANGER
Before commencing work, the user must read the instructions for lifting jack and adhere
to the manufacturer's instructions.
The lifting jack must be stably supported by the ground and so must the axle.
Ensure that trailer shall not move during inspection of axle bearing slackness.
5.2.3 ADJUSTMENT OF AXLE BEARING SLACKNESS
The wheel should turn smoothly without jamming and detectable resistance. Adjustment of
bearing slackness may only be conducted when the trailer is not loaded and is hitched to the
tractor.
Ensure that the trailer is properly secured and will not move during wheel dismounting.