AVANT 755, Руководство оператора

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755/760i Service and maintenance instructions
9. Check and tightening of bolts, nuts
and fittings
Check tightness of bolts, nuts and hydraulic fittings
regularly. However, do not overtighten; tighten hydraulic
fittings only if necessary. Wheel nuts should be tightened
250 Nm.
Tighten wheel nuts after first 5 operating hours.
Check tightness of wheel nuts regularly.
10. Check pressure of hydraulic system
Pressure checking points and
pressure settings for different
functions are as follows:
Boom lifting: Pressure is checked
from the manometer fitting which
is mounted on the main control
valve (or from the quick coupler
of rear auxiliary hydraulics if the
machine is equipped with rear
aux. hydraulics outlet.) Pressure
is measured with full engine revs
and by turning e.g. the bucket tilt
control to end position. Pressure
setting should be 225 bar.
Auxiliary hydraulics: Pressure is
checked from the measuring point,
with full revs and by turning the
aux. hydraulics control lever. Pressure setting should be
225 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 370 bar pressure setting.
It is recommended that pressures should only
be checked by a competent and experienced
technician. Call your AVANT dealer if you need
assistance.
11. Adjust pressure of hydraulic 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 doesn’t 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 (225 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 (225 bar).
Drive pressure:
Can not be adjusted. If the pressures
are clearly wrong one must change the pressure relief
cartridges which have 370 bar fixed pressure setting.
Never exceed the recommended hydraulic
pressure settings. Excessive hydraulic pressure
will damage or wear the hydraulic pumps,
cylinders, and hydraulic motors.
Warranty does not cover damages caused by
excessive hydraulic pressure.