Komatsu Utility PC26MR-3, Operation & Maintenance Manual

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MAINTENANCE PROCEDURES
WEAM009500 193
4.9.1.d CLEANING THE FUEL FILTER (WITH WATER SEPARATOR)
WARNING
q
Change the filter 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.
1. Open the engine hood. (For details, see "3.2.6 ENGINE
HOOD").
2. Turn the valve (1) of the filter to the closed position (A).
3. Loosen the metal ring (2) with a filter wrench and remove the
casing (3) and the filtering element (5).
Take care not to lose the red ring (4) that is positioned inside
the casing.
4. Wash the inside of the casing (3) and the filtering element (5)
with diesel or flushing oil.
5. After washing, install the filtering element (5).
6. Place the red ring (4) in the casing (3) and fill it with fuel, then
put back the casing and tighten the metal ring (2).
7. Turn the filter valve (1) to the opening position (B) and purge
the air as indicated below.
IMPORTANT
q
When removing the filter, be careful so as not to lose the
sump red ring.
q
If the filtering element is excessively clogged or damaged,
change it.
BLEEDING THE FUEL CIRCUIT
WARNING
q
The engine may start during the bleeding operations; make
sure that there is no one near the machine.
1. After filling the fuel tank, make sure that the valve (1) of the
filter is in open position (B).
3. Turn the ignition key to position ON and wait approximately
15-20 seconds, in such a way as to allow the fuel system to
be automatically bled.
3. Turn the ignition key to position START and start the engine.
IMPORTANT
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 and of the fuel pump
prefilter.
q
When all the fuel in the tank has run out, bleed the circuit
by proceeding as described above and repeat the opera-
tion at least twice.
RKA13380
2
1
3
5
4
A
B
RYA17290
RYA17360