MAINTENANCE PLAN
165
4.7.11 MAINTENANCE EVERY 2000 HOURS OF OPERATION
4.7.11.a CHANGING THE HYDRAULIC SYSTEM
OIL AND CLEANING THE SUCTION FIL-
TER
Carry out these operations together with those to be performed every 100, 250, 500 and 1000 HOURS.
• On machines containing synthetic biodegradable hydrau-
lic oil type HEES, carry out the change after the first 500
hours of operation and successively every 2000 hours,
and in any case at least once a year.
• Retract the bucket and arm cylinder completely, lower the
bucket teeth to the ground and, after stopping the engine,
release the residual pressures from the work equipment
circuits (by operating the controls more than once) and
from the tank (by slowly loosening the filling cap).
• Let the oil cool down until it reaches 4045°C before carry-
ing out any maintenance operation.
• Immediately clean any area dirty with oil.
• Oils, filters, the coolant and the battery are considered
special waste and must be collected and disposed of ac-
cording to the anti-pollution regulations in force.
1 - Rotate the upper structure of 45°, in such a way as to leave
the lower part of the hydraulic oil tank free from the tracks.
2 - Retract the bucket and arm cylinder completely and lower the
boom until the bucket teeth touch the ground.
3 - Lower the blade to the ground.
4 - Stop the engine and eliminate the residual pressures present
in the equipment (by moving the controls several times).
5 - Slowly loosen the filling cap (1) in order to release the residu-
al pressure.
Use a 24 mm hexagon spanner.
6 - Remove the drain plug (2) and let the oil flow out, gathering it
into a container with suitable capacity.
Use a 32 mm hexagon spanner.
RWA09270
RYA12250
1
2
RWA07490
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