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excessive wear has taken place on the
coupling head, the coupling ball, or both.
If this is the case, make a further check using
a new 50mm ball.
If the gap is still unchanged the coupling
head is excessively worn and should be
replaced. However, if the gap is greater, your
original 50mm ball should be replaced.
NOTE: If you need to replace your coupling
head, carry out the check once more, as your
tow ball may also need to be replaced. It is
recommended that the coupling head and
ball are replaced at the same time, as this will
extend the service life of both components.
9.4 JOCKEY WHEEL
The jockey wheel should be checked monthly.
Any damaged or worn parts should be
replaced immediately. Lubricate the wheel
spindle and screw thread every 6 months.
9.5 PARABOLIC LEAF
SPRINGS
Check the tightness of the self-locking nuts
on the U bolts every 1000 miles or 2 months.
Or at every brake service check, whichever is
sooner. Tightening torque: 140 Nm.
35
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