Komatsu Utility 97SF11205, Operation & Maintenance Manual

Page: 237 / 296

MAINTENANCE PLAN
235
4.7.10.f DRAINING THE HYDRAULIC OIL TANK
(Only for machines in which the synthet-
ic biodegradable oil type HEES is used)
DANGER
•
After stopping the engine, with the machine in the correct
position for the performance of maintenance operations,
eliminate the residual pressures from the equipment (by
moving the controls more than once) and from the tank
(by slowly loosening the filling cap).
•
Let the oil cool down until it reaches 40÷45°C before car-
rying out any maintenance operation.
•
Immediately clean any area dirty with oil.
This operation serves to let the condensate accumulated on the
tank bottom flow out of the tank itself; for this purpose, carry out
the following operations in the given sequence:
1 - Remove the screws (1) and the platform (2).
Use a 17 mm spanner.
2 - Loosen the filling cap (3) to release the residual pressure
from the tank.
use a 24 mm spanner.
3 - Remove the drain plug (4) until the condensate has flown out
of the tank completely.
Use a 41 mm spanner.
4 - Put back the filling cap (3) and the platform (2).
IMPORTANT
☞
•
The draining of the tank must be carried out at tempera-
tures exceeding 0°C, before starting the engine; when the
temperature is below 0°C, the hydraulic oil tank must be
drained at the end of work, or in any case when the tem-
perature of the machine is sufficiently high to prevent the
condensate from freezing and allow it to flow out of the
tank without problems.
RWA34460
2
1
RWA34470
4
3