Avant Tecno Oy Avant 850 Operator'S Manual Download

Page: 109 / 138

Avant 850

Service and maintenance

109

WARNING

Damaged or modified safety

structures do not protect in same

way as original ones.

In case the

ROPS safety frame or the FOPS

canopy of the machine gets

damaged, the machine must be

taken to Avant service for checking.

It is not allowed to repair the ROPS

and FOPS.

Check tightness of bolts, nuts, and

fittings

Check tightness of bolts, nuts, and hydraulic fittings
regularly. Check visible bolts and hydraulic fittings
visually daily. Check bolts and fittings more
thoroughly as part of periodic maintenance. Do not
start the loader if any bolt, pivot pin, or hydraulic
fitting is loose, damaged, or missing.

Check pivot pins

Check the pivot pins and the tightness of the locking
screws that lock the pivot pins:



pins connecting the articulated frames



pins connecting the steering cylinder



pin connecting the boom to the front frame



all pins of the boom and its cylinders

If any pivot pin locking bolt is loose, apply thread
locker compound and tighten the bolt.

WARNING

Risk of dropping of load - Check

all pivot pins.

Check the tightness

of the locking screws of all pivot

pins. Also check the pivot pin

connecting the boom to the front

frame. If any of them is loose, use

thread locking compound and

tighten.

Check wheel nuts

Check tightening of the wheel nuts with a torque
wrench. Wheel nuts must be tightened to 225 - 275
Nm. The wheels and nuts settle in after first few
hours of use, check the tightness after 5 hours of
use.

Tighten wheel nuts after first 5
operating hours. Check tightness of
wheel nuts regularly.

Other bolts and nuts

Bolts and nuts on the loader are standard metric
system type. If replacement of bolt or nut is
necessary, replace both at the same time with ones
that are identical in size and grade.

Most bolts and nuts on the loader are metric grade
8.8. See the spare parts catalog for information
about bolts, nuts, and washers. Contact Avant
service if you are unsure of suitable fasteners.



Check the bolts connecting the rear frame
extension to the rear frame. These bolts must be
tightened to 227 Nm. These bolts must be grade
10.9.



Check the fastening of the drive motors. For
more information see page 124.

These bolts must be checked after the first 50 hours
of service, and then after every 400 hours or 1 year
of use, whichever comes first.

Check hydraulic fittings

Check hoses and fittings visible on the loader boom.
Push and pull the hoses manually and look if any
fitting is loose.

Do not overtighten hydraulic fittings. Tighten any
hydraulic fitting only if there are signs of leakage or
loose connection. Tightening of a hydraulic fitting
unnecessarily can damage it.

Make sure that replacement hoses and fittings are
compatible with the fittings on the loader. Contact
Avant service when hoses or fittings need to be
replaced.

Hydraulic fittings of drive motors and hoses of
drive system

Hydraulic fittings of the drive system are equipped
with a visible marker where a yellow marker is fully
visible, when the fitting is tightened correctly. If a
hose or fitting needs to be replaced, use only hoses
which are equipped with compatible fittings.

Reuse of hydraulic hoses or fittings

Never reuse pressed fittings that are part of hydraulic
hoses. If a hose must be replaced, it must always be
equipped with new fittings. Use only high quality
hoses and fittings. Hoses must be made with
professionally made pressed fittings. Do not use
reusable hose fittings.