MAINTENANCE
3-32 WB140-2N, WB150-2N
MAINTENANCE AFTER FIRST 50 HOURS OF OPERATION
(ONLY FOR MACHINES IN WHICH SYNTHETIC BIODEGRADABLE OIL TYPE HEES IS USED)
The following maintenance operation must be performed after the first 50 hours of operation, together with maintenance
operations to be initiated “EVERY 50 HOURS”.
• HYDRAULIC OIL DRAIN FILTER CHANGE
For further details on the various maintenance operations, See “MAINTENANCE EVERY 500 HOURS OF OPERATION”
on page 3-41.
MAINTENANCE EVERY 50 HOURS OF OPERATION
CHECKING RADIATOR FLUID LEVEL
The radiator cap can be reached after opening the engine hood.
Remove the cap (1) and make sure that the fluid is very near the filling hole.
★ If level of fluid in the radiator is low and the expansion tank is filled with coolant, check cap tightness and make sure that
there are no air leaks from the coupling that connects the radiator and expansion tank. If problem persists, contact your
Komatsu Dealer.
CHECKING BRAKE SYSTEM OIL LEVEL
The brake reservoir (1) can be reached after opening the engine hood.
This is a visual check and the reservoir must be topped off with the
prescribed fluid until reaching the MAX. mark (See “FUEL,
COOLANT, AND LUBRICANTS” on page 3-7).
★ Use new oil only.
★ If constant and considerable leakages are observed, it is advisable
to contact your Komatsu Dealer to have the system checked and
necessary repairs made.
• Perform this check with the machine parked on level
ground and loader arm raised with the safety lock
engaged
• Do not remove the radiator cap when the fluid is hot,
since the fluid may be sprayed out of the radiator and
cause burns.
• Loosen the cap slowly to release the pressure before
removing it.
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