PRONAR T743, Operator'S Manual

Page: 105 / 150

Pronar T743 SECTION 5
5.6
Grasp wheel above and below and try to feel any slack play, this may equally
be checked with the aid of a jack placed under the wheel supported on the
floor/ground.
If slack 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.
Bearing adjustment should be performed according to the following instructions – figure (5.1):
take off hub cover (1),
take out split cotter pin (3) securing castellated nut (2),
turning the wheel simultaneously tighten castellated nut until the wheel comes
to a stop,
unscrew nut (not less than1/3 rotation) to cover the nearest thread groove with
alignment to opening in wheel stub axle
secure castellated nut with cotter pin and mount hub cap.
The wheel should turn smoothly without stiffness or detectable resistance not originating from
abrasion of brake shoes in brake drum.
Inspection and adjustment of bearings may only be conducted, when the trailer is hitched to
a tractor and trailer load box is empty.
Bearings replacement, lubrication and repairs connected with brake system and wheel axle
should be entrusted to specialist service provider. For axle technical service, the user may
only inspect the technical condition of the axle system, inspect bearing slack and their
adjustment.
Checking and/or adjustment of wheel axle bearings:
•
after the first week of use or covering a distance of 100 km,
•
Every 6 months of use.