Komatsu Utility WB97S-5, Operation & Maintenance Manual

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MAINTENANCE PROCEDURES
217
4.8.10.f DRAINING THE HYDRAULIC OIL TANK (only for machines in which synthetic
biodegradable oil type HEES is used)
WARNING
q
After stopping the engine, with the machine in the correct position for the performance of maintenance
operations, eliminate the residual pressure from the equipment (by moving the controls more than once)
and from the tank (by slowly loosening the filler cap).
q
Let the oil cool down until it reaches 40–45°C before carrying out this maintenance operation.
q
If any oil has been spilled, wipe it up immediately, in order to prevent the surface from getting slippery.
q
Oils, filters, the coolant and the battery are considered special waste and must be collected and
disposed of according to the regulations in force.
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 - Open the engine hood (see "3.5.1 ENGINE HOOD") and
loosen the filler cap (1) to release any residual pressure from
the tank.
2 - Remove the drain plug (2) until all the condensate has flown
out of the tank. Use a 27 mm wrench.
3 - Put back the filler cap (1) and close the engine hood.
IMPORTANT
q
Condensate should be drained before starting the engine,
at temperatures above 0°C. When the temperature is below
0°C, the draining procedure should be carried out at the
end of work or in any case with the machine at operating
temperature (40-45°C), to prevent the condensate from
freezing, thereby making the draining operation
impossible.
RKAB4040
1
RKAB4320
2
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