Checking Wheel Axle Bearings For Slackness - PRONAR T900 Operator's Manual

SECTION 5
• other axle repairs,
may be performed by specialized vehicle service stations.
5.2.2

CHECKING WHEEL AXLE BEARINGS FOR SLACKNESS

Wheel bearings are subject to wear. Their durability depends on use conditions, load, vehicle
speed, adjustment and lubrication of bearings, etc. In order to check the condition of
bearings, perform the actions below.
Preparation procedures
Hitch trailer to tractor, immobilize tractor with parking brake.
Park tractor and trailer on hard level ground.
Place chocks under the trailer's wheel that will not be raised. Ensure that
machine will not move during inspection.
Raise the wheel (opposite to the side where chocks are placed).
Release parking brake.
Checking 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.
Moving the wheel try to detect slackness.
Repeat the procedure for each wheel individually, remembering that the jack
must be on the side opposite to the chocks.
Tractor must be placed to drive forward.
The lifting jack should be placed under the axle between U bolts fixing
shock absorber leaf springs to the axle. Lifting jack must be suitable
for the weight of the trailer.
You may use a lever placed under the wheel supporting the other end
of the lever on the floor.
5.3
Pronar T900