29
Service and maintenance instructions
Auxiliary hydraulics:
An adapter
(A414508) with conventional
quick couplers must be mounted
on the multi connector. Pressure
is checked from one of the female
quick couplers, with full revs
and by turning the aux. hydraulics control lever. Pressure
setting should be 200 bar.
Drive pressure:
In order to check the pressure in
the drive circuit one needs to mount a pressure gauge
in the pressure line in each and every case, if pressure
seems to be clearly wrong. There are two pressure
relief cartridges which have fixed 300 bar pressure
setting.
It is recommended that pressures should only
be checked and adjusted by a competent and
experienced technician. Call your AVANT dealer
if you need assistance.
10. Adjust pressure of hydr. system
If the pressure of hydraulic system does not seem to
be correct or pressure check indicates that the pressure
is wrong, it can be adjusted. All adjustment screws
are protected with a 13 mm nuts and there is a seal
ring under each nut. When taking off the nuts make
sure that the seal rings doesnt get lost. Adjust the
pressure with an allen key, max. 1/8 rounds at a time.
See pictures for pressure adjustment points.
Boom lifting
: Pressure is
adjusted from the pressure
relief valve at the main control
valve. Pressure adjustment
screw is on the right, on top of
the valve segment (see picture).
Adjust by turning the hexagonal
head screw which is under the
cap (200 bar).
Auxiliary hydraulics
: Pressure
is adjusted from the pressure
relief valve at the main control
valve. Pressure adjustment
screw is on the right, under the
valve segment (see picture).
Adjust by turning the screw
with a screwdriver (200 bar).
Drive pressure
: Can not be
adjusted. If the pressures are
clearly wrong one must change the pressure relief
cartridges which have 300 bar fixed pressure setting.
11-13 Adjust and change the slide pads
on telescopic boom
The telescopic boom is equipped with slide pads. At
the lower end of the outer boom there are slide pads
made of nylon (nos. 1, 2, 3 and 4). In addition, there
are four slide pads (nos. 5,6,7 and 8), made of
aluminium-bronze alloy, at the upper end of the inner
boom. All slide pads can be replaced, and the nylon
slide pads on the outer boom can also be adjusted.
This way the natural wear
of the slide pads, caused be
the use of the telescopic
boom, can be compensated.
Slide pads nos. 1 and 2
can be adjusted by mounting
thin adjustment sheets
between the boom and the
slide pad. Extend the
telescope almost completely
and press the boom against
the ground, it is the easiest
way to mount the
adjustment sheet under slide
pad no. 2 .
However, if there is
substantial wear in the slide
pads it is advisable to replace
both pad no. 1 and 2.
Slide pads
nos. 3 and 4
on
the side of the outer boom
and slide pads
nos. 5, 6, 7
and 8
at the upper end of
the inner boom last very
long in normal use.
Slide pads 3, 4, 5, 6, 7 and
8 should be checked every
400 operating hours.
Checking happens by taking
the inner boom completely
out of the outer boom. If
the pads have worn so much
that they are level with the
boom, change the pads.
Part nos. for the slide pads are:
Slide pad 1 and 2: A48339
Slide pad 3 and 4: A48340
Slide pad 5 and 6: A47922
Slide pad 7 and 8: A48343
Washer under slide pads 5 and 6: A47941
Adjustment sheet, short: A48013
Adjustment sheet, long: A48014
6
8
5
7
2
1
3
4
Never exceed the recommended hydraulic
pressure settings. Excessive hydraulic pressure
will damage the hydraulic pumps, cylinders,
and hydraulic motors.
Warranty does not cover damages caused by
excessive hydraulic pressure.
R35