Komatsu Galeo PC138US-8 Shop Manual page 791

50 Disassembly and assembly
5. Removal of supply pump assembly
1) Loosen nut (24) and pull out supply pump
gear (25) using gear puller [1]. [*5]
2) Remove 3 nuts (26) and remove supply
pump (27) from pump holder (28).
PC138US, USLC-8
Installation
Carry out the installation in the reverse order of
q
removal.
[*1]
a Set the boot slit facing outward and downward.
a The boot is designed with fire safety to prevent
fuel from splashing onto the hot engine if fuel
leaks.
[*2]
k
Never bens a high-pressure pipe for the
convenience sake.
k
The clamp used for fixing a high-pressure
pipe must be a genuine Komatsu part and it
must be tightened to the specified torque.
k
Be sure to install the boot to the sleeve nut
after installing the high-pressure pipe.
a Before installing a high-pressure pipe, confirm
the following points. If any abnormality was
found, replace it with new one. Otherwise,
leakage of fuel can result.
No visible striations (b) or patchy dents (c) in
q
the taper seal portion of the connection ( (a)
portion: area 2 mm inside the tip).
No deformation in portion (d) (at the end of the
q
taper seal portion: 2 mm inside the tip).
3
Sleeve nut (12) on the common rail side:
25.5 – 29.4 Nm {2.6 – 3.0 kgm}
3
Sleeve nut (13) on the supply pump side:
[*3]
3
Joint bolts (16) and (17):
24.5 – 34.3 Nm {2.5 – 3.51 kgm}
3
Joint bolt (18):
19.6 – 17.7 Nm {2.0 – 1.8 kgm}
[*4]
a For mounting bolt (22), install M6 bolt with LT-
2A.
[*5]
3
Pump gear mount nut:
SEN02710-00
18 – 23 Nm {1.9 – 2.3 kgm}
65 – 75 Nm {6.6 – 7.6 kgm}
3