PRONAR T743, Operator'S Manual, Page: 104 / 150

SECTION 5 Pronar T743
5.5
5.2.1
OPERATION NO. 1 - CHECKING WHEEL AXLE BEARINGS
In newly purchased trailer, after the first week of use or covering a distance of 100 km, while
during further use – after 6 months of vehicle use check and regulate wheel bearing
slackness when needed. Worn or damaged bearing should be replaced.
Required service actions
Hitch trailer to tractor, braking tractor with parking brake.
Place blocking chocks or other objects without sharp edges under trailer
wheels and raise wheels in succession using the appropriate lifting jack.
The lifting jack should be placed under the axle between U bolts fixing shock
absorber leaf springs to the axle. Make certain that the trailer will not move
during inspection of the bearing.
Turning the wheel slowly in both directions check that movement is smooth
and that the wheel rotates without excessive resistance
FIGURE 5.1 Adjustment of road wheel axle bearings
(1) hub cover, (2) castellated nut, (3) securing split cotter pin
Turn the wheel so that it rotates very quickly, check that the bearing does not
make any unusual sounds.