Komatsu WB93R-5, Operation & Maintenance Manual

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MAINTENANCE PROCEDURES
217
4.8.10.d CHANGING THE FUEL FILTER
WARNING
q
Change the filtering element after work, when the engine has cooled down to 40÷45°C.
q
During these operations some fuel may be spilled; clean the dirty areas immediately, in order to prevent
any risk of slipping or fire.
q
Oils, filters, the coolant and the battery are considered special waste and must be collected and dis-
posed of according to the regulations in force.
The fuel filter and the fuel pump can be reached after opening the
engine hood (see "3.5.1 ENGINE HOOD").
FUEL FILTER
1 - Clean the external surfaces of the unit and then unscrew the
old filter (1) using the special wrench provided, then discard
the filter.
2 - Clean the inside of the filter housing head (2).
3 - Fill the new filter with clean diesel oil, lubricate the seal and
screw thoroughly until the filter rests against the seal.
4 - Give another half turn by hand.
5 - Bleed the fuel circuit.
BLEEDING THE CIRCUIT
After refuelling, proceed as follows:
1 - Turn the ignition key to position « ».
2 - Loosen the bleeder screw (3) on the filter housing head (2).
3 - Operate the fuel pump (4) and keep it running until no more
air can be observed in the fuel that flows out of the filter head
(2).
Tighten the bleeder valve (3).
4 - Start the engine.
IMPORTANT
q
If no fuel flows when the fuel pump lever is operated, give
the crankshaft 1 turn.
q
Do not let the starter run for more than 15 seconds. Wait at
least 15 seconds before starting the engine again.
q
If the engine starts regularly and then stops or functions ir-
regularly, check if there is air in the circuit; in this case,
check the tightness of the fuel filter, the water separator
and the fuel pump.
q
When all the fuel in the tank has run out, bleed the circuit
by proceeding as described above.
RKAB4000
3
2
1
RWA01960
RKAB4010
1
4
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