Axle Bearing Clearance Adjustment - PRONAR T400 Operator's Manual

CHAPTER 5
TIP
Damaged hub cover or lack of it will cause the penetration of dirt and moisture into the
hub, which will result in much faster wear of bearings and hub seals.
Bearing life depends on trailer operating conditions, load, vehicle speed and lubrication
conditions.
Check the technical condition of the hub cover, replace if necessary. Checking bearing
clearance can only be carried out when the trailer is connected to the tractor and the load box
is empty.
DANGER
Before starting work, read the jack operators manual and follow the manufacturer's
instructions.
The lift must rest firmly on the ground and against the drive axle.
Ensure that the trailer will not roll away during inspection of the axle bearings clearance.
5.2.3

AXLE BEARING CLEARANCE ADJUSTMENT

The wheel should rotate smoothly, without any jams or noticeable resistance not coming from
rubbing the shoes on the brake drum. Adjustment of bearing clearance may be performed
only when the trailer is connected to the tractor and the load box is empty. Ensure that the
trailer is properly secured and will not roll away during dismantling.
Adjusting the axle bearing clearance
Remove the hub cover (1) - figure (5.2).
Remove the cotter pin (3) securing the castellated nut (2).
Tighten the castellated nut to remove clearance.
Unscrew the nut (not less than 1/3 turn) to cover the nearest nut groove with a
hole in the axle journal. The wheel should rotate without excessive resistance
The wheel should rotate with slight resistance.
5.5
Pronar T400