Removal And Installation Of Fuel Supply Pump Assembly - Komatsu WA250-6 Shop Manual

SEN03852-00
Removal and installation of fuel
supply pump assembly
Removal
k
Stop the machine on a level ground and set
the lock bar to the frame to fix the front and
rear frames.
k
Lower the work equipment to the ground,
stop the engine, apply the parking brake,
and put chocks under the tires.
k
Disconnect the cable from the negative (–)
terminal of the battery.
1. Open and fix right engine side cover (1).
a Check that the cover is locked securely.
2. Remove fuel prefilter and bracket assembly
(2).
a Fix fuel prefilter and bracket assembly (2)
to the machine with ropes.
3. Disconnect wiring harness connector CN-CP3
(3) from fuel supply pump (4).
4. Disconnect fuel filter hoses (5) and (6) from
fuel supply pump (4).
2
50-200

Removal and installation of fuel supply pump assembly

5. Disconnect fuel return hose (7) from fuel sup-
ply pump (4).
1
a If mud is sticking, lock (L) may become
stiff. Accordingly, clean the connecting
area.
a Press lock (L) from both sides and pull out
hose (5).
a Plug the disconnected hose to prevent
fuel leakage.
6. Disconnect fuel supply hose (8) from fuel sup-
ply pump (4).
7. Remove 2 clamps of boot (9) and fuel high-
pressure pipe (10).
8. Disconnect fuel high-pressure pipe (10) from
fuel supply pump (4).
a Remove the boot on the common rail side
of high-pressure pipe (10) and loosen the
sleeve nut.
200 Engine and cooling system
WA250, 250PZ-6
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