PRONAR T669XL, Operator'S Manual, Page: 93 / 135

SECTION 5 Pronar T669XL, Pronar T700XL
5.7
TIP
If hub cover is damaged or missing, contamination and dampness enter the
hub, which causes significantly faster wear of bearing and hub seals.
Life of bearings is dependent on working conditions of the trailer, loading,
speed of travel and lubrication conditions.
Check condition of hub cover, if necessary replace it with a new cover. Inspection of bearing
slackness may only be conducted when the trailer is hitched to tractor and the load box is
empty and not raised.
Check wheel axle bearings for slackness:
•
after travelling the first 1,000 km,
•
after intensive use of trailer,
•
every six months use or every 25,000 km.
5.2.5 ADJUSTMENT OF SLACKNESS OF WHEEL AXLE BEARINGS
The wheel should turn smoothly without stiffness or detectable resistance not originating from
abrasion of brake shoes in brake drum. Adjustment of bearing slackness may only be
conducted, when the trailer is hitched to a tractor and the load box is empty.
Preparation procedures
Prepare tractor and trailer for adjustment procedures according to description
provided in section 5.2.4.
Adjustment of slackness of wheel axle bearing
Take off hub cover (1) – figure (5.3).
Take out cotter pin (3) securing castellated nut (2).
Tighten castellated nut in order to eliminate slackness.
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.