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

SEN03852-00
Removal and installation of fuel
injector assembly
Special tools
Symbol Part No.
3 795-799-6700 Puller
A 4 795-799-1131 Gear
5 795-799-8150 Remover
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.
k
If the radiator coolant temperature is high,
you may scald yourself with the hot cool-
ant. Wait until the coolant is cooled, and
then drain the coolant.
1. Loosen the radiator cap to drain the coolant.
6
Radiator: Approx. 22 l
2. Remove the engine hood assembly. For
details, see "Removal and installation of
engine hood assembly".
3. Lift off muffler (1).
a Take care that the muffler will not interfere
with water drain tube (2).
4
Muffler assembly: Approx. 35 kg
4
50-200
Part name
t 1
t 1
q 1

Removal and installation of fuel injector assembly

4. Disconnect engine intake air heater wiring har-
ness terminal CN-E07B (3).
1
5. Remove clamp (4) and bracket (4a).
6. Remove clamp (5), air hose (5a), mounting
bolt (6a) and intake air inlet elbow (6).
a Remove the engine intake air heater, too.
7. Remove 2 wiring harness clamps (7).
8. Disconnect wiring harness connector (8).
a While pressing the lock of wiring harness
connector (8) with flat-head screwdriver
[1], pull the connector in the direction of
the arrow.
a Do not remove fuel pressure sensor (PS)
except for replacement.
9. Disconnect 3 wiring harness connectors (9).
a While pressing the lock of the wiring har-
ness connector with flat-head screwdriver
[2], pull the connector.
a Move wiring harness (10) toward the
intake manifold.
200 Engine and cooling system
WA250, 250PZ-6
[*1]
[*2]
[*3]
[*4]