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Technical inspection schedule
5.12 CHECKING WHEEL AXLE BEARINGS FOR SLACKNESS
DANGER
Before commencing work, the user must read the
instructions for lifting jack and adhere to the manu-
facturer's instructions.
The lifting jack must be stably supported on the
ground and absorber plate.
Make sure that the machine does not roll when
checking the wheel axle bearings slackness.
Inspect the bearing slackness only when the trailer
is hitched to tractor and the load box is empty and
not raised.
PROCEDURE
• Hitch trailer to tractor, immobilize
tractor with parking brake.
• Position the tractor and trailer to drive
forward, on a hard and level surface.
• Place the wheel chocks under the
wheel opposite to the lifted wheel.
Ensure that trailer is immobilised
during inspection.
• Raise the wheel (opposite to the side
where chocks are placed). The lifting
jack should be placed under the ab-
sorber plate fixing the axle to the leaf
spring, figure (5.1). Lifting jack must
be suitable for the weight of trailer.
• Turn the wheel slowly in both di-
rections. Check that movement is
smooth and that the wheel rotates
without excessive resistance and
jamming figure (5.10).
• Turn the wheel so that it rotates very
Figure 5.10
Check slackness
quickly, check that the bearing does
not make any unusual sounds.
• Moving the wheel try to detect
slackness.
• Repeat the procedure for each wheel
individually, remembering that the
jack must be on the side opposite to
the chocks.
• If slackness is felt, adjust bearings
figure (6.3). Unusual noise made by
the bearing may be a symptom of ex-
cessive wear, dirt or damage. In such
an event the bearing, together with
sealing ring, should be replaced with
new parts, or cleaned and greased
again During inspection of bearings,
ensure
that
slackness comes from the bearing
and not from the suspension system
PRONAR T700M/1
Section 5
526-I.10-1
possibly
detected
5.15
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