Service and maintenance
Avant 850
122
Slide pads 1 and 2
Slide pads 1 and 2 can be
adjusted by mounting thin
adjustment sheets between the
boom and the slide pad.
Fully extend the telescope and
press the boom gently against
the ground. This way it is the
easiest to mount an adjustment
sheet under lower slide pad 1.
However, if there is substantial
wear in the slide pads it is
advisable to replace both pads
1.
Slide pads 3 and 4
Slide pads 3 and 4 at the upper
end of the inner boom last long
in normal use. They should be
checked after every 400
operating hours and replaced at
least after 800 hours of use.
To check these slide pads, take
the inner boom completely out
of the outer boom. If the pads
have worn so much that they
are in level with the boom, or
excessive boom play can’t be
removed by adjusting slide
pads 1 and 2, replace all slide
pads.
To replace slide pads 3 and 4 the
boom must be partially
disassembled. Lifting equipment is
required in order to do the service
safely. It is recommended to leave
this service operation to your
nearest Avant service partner.
Slide pad part numbers
Slide pad 1
A430928
Adjustment sheet, long:
A430931
Slide pad 2
A430929
Adjustment sheet, short:
A430932
Slide pad 3
A48343
Slide pad 4
A47922
Spacer under slide pad 4
A47941
17.
Check mounting and operation
of drive motors
Check the tightness of the drive motor fastening
bolts. The bolts should be tightened to 200 Nm.
Test the functionality of the drive motors by pushing
against a fixed structure, or a pile of sand, for
example. All four wheels should spin.
18.
Test and check engine for
vibrations, noise, and general
performance
Abnormal noise and vibration of the engine should
be checked as soon as it has been noticed. Noise or
vibration can be signs of developing engine damage
that should be repaired as soon as possible. Contact
your Avant service if you suspect abnormal vibration
or noise. The turbocharger of the Kohler engine may
have a whistling sound which is normal and can be
typically heard also at idle rpm.
The cooling fan and parts related to the cooling
system have a significant effect on the engine noise.
Check that the cooling fan, air ducts, and any
dampening materials are in good condition.
Check the vibration damping mounting pads of the
engine. Replace damaged dampers.
Summary of Contents for Avant 850
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