81
Before each trip and whenever a wheel is replaced, be sure to tighten the wheel nuts, following
the sequence shown in the relevant lug pattern. Set the torque specification (see Specifications).
If the wheel was replaced, check the torque after 300 km.
If you notice wheel wobbling or hear a rattling sound coming from a wheel, especially at low
speeds, a wheel lug nut may have come loose. This problem is usually caused by improper
tightening or by faulty or damaged lug bolt threads. If you have a reason to believe a lug nut has
come loose, safely stop the vehicle at the side of the road as soon as possible. Put up warning
devices. Remove the lug caps and check the tightness of all the lug nuts. Tighten all lug nuts to
the specified torque, using a torque wrench. If lug stud threads are damaged or faulty, get
professional service help.
Axle systems are installed with hubs and drums that are compatible with many wheels used in
the trailer industry that have matching bolt patterns. If the original manufacturer installed
equipment is in need of replacement, the wheel manufacturer should be contacted for proof of
compatibility prior to replacement and use.
Customers replacing original equipment that has not been tested for compatibility must ensure
the replacements are compatible to the hub and drum assembly installed. Such elements of
compatibility include, but are not limited to:
• Diameter of the hub-mounting surface.
• Stud length and diameter.
• Location and number of studs.
• Centre hold diameter for the wheel.
• Wheel mounting offset from the rim centre.
• Rated capacity of the wheel.
• Wheel fastener torque.
• Wheel nut size and shape.
• Impact of any added wheel accessories (such as decorative centre caps) that could affect
proper seating of the wheel to the hub surface.
WARNING: AVOID
MISMATCHED
WHEELS
AND
TIRES
THAT
COULD
RESULT
IN
A
SERIOUS
ACCIDENT,
INJURY
OR
DEATH.
Wheel Bearing Inspection
Inspecting the bearings prevents the ball bearings from deteriorating; this ensures optimum
durability and can prevent serious accidents.
1. Insert jack under the frame, protect the aluminum side rail with a piece of wood between
the jack and the frame, and hoist the trailer.
2. Check for excessive wheel-end clearance by pulling the tire assembly towards you and by
pushing the assembly away from you. A slight end-play is acceptable.
3. Rotate tire slowly forward and backwards. The wheel assembly should turn freely and
smoothly.
4. Excessive wheel end-play, restriction to rotation, noise, or “bumpy” rotation should be
remedied by replacing the bearing unit.
To Next Page
Loading...