PRONAR T680, Operator'S Manual, Page: 105 / 147

SECTION 5 Pronar T680
5.7
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 on the ground and so must the axle.
Ensure that trailer shall not move during inspection of axle bearing slackness.
5.2.5 ADJUSTMENT OF PLAY OF WHEEL AXLE BEARINGS
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.
Take off hub cover (1), figure (5.3).
Take out cotter pin (3) securing castellated nut (2).
Tighten castellated nut in order to eliminate looseness.
Wheel should rotate with insignificant resistance.
Undo nut (not less than 1/3 rotation) to align the nearest thread groove with the
opening in wheel axle pin. Wheel should rotate without excessive resistance.
Nut may not be excessively tightened. Do not apply excessive
pressure because working conditions of the bearings may deteriorate.
Secure castellated nut with cotter pin and mount the hub cap.
Delicately tap the hub cap with rubber or wooden mallet.
TIP
If the wheel is dismounted, bearing looseness is easy to check and adjust.