Maintenance -
Boom adjustments
|
Anti-yaw adjustment The boom is fitted with an anti-yaw device to damp out any yawing movements of the boom. As the nylon wear plates begin to wear the play will increase.
You will find that the booms will
not clear the front supports by an adequate margin when you are
folding the booms if the play becomes too great. The gap between the spring cover tube and the rear wear plate should not exceed 30mm. It should be checked with the boom open and it can be adjusted by tightening the two nuts indicated. Ensure that the top and bottom bolts are adjusted evenly. |
|
Wear pads
There are two sets
of wear pads fitted to the boom and anti-yaw plates. These should be
kept lightly lubricated and should be regularly inspected for wear
and replaced if necessary. If they get badly worn they will stop the
boom suspension system working and will cause boom problems as
previously discussed.
Boom folding
Folding chains
As the booms fold inwards the
weight is taken on the folding chains instead of the dampers. The
length of these chains should not be adjusted unless absolutely
necessary. They should always be slack when the boom is fully down in
its rests in the transport position.
If you do not have adequate
clearance between the booms and the front supports when folding the
booms, ensure that the sliding frame and the anti-yaw device are both
adjusted correctly first before touching the folding chains. If you
do find it necessary to shorten these chains it is imperative that
they are not over-shortened. Doing so will reduce the amount of
weight carried on the front supports in the transport position and
increase the pressure on the aluminium centre section. This, over the
long term, will lead to fatigue and possible boom failure.
|
Main fold rams |
|
