Komatsu PC88MR-10 Shop Manual page 1064

50 Disassembly and assembly
Engine and cooling system
2) Tighten injector harness (71) with nut (72).
Lock nut (72):
2.0 to 2.4 Nm {0.20 to 0.24 kgm}
a Be careful that the injector harness is not
pinched by the tool and rocker housing.
a Installing position of injector wiring
harness
Color of injector wiring
harness
White
Black
7. Fuel high-pressure pipe
Do not bend the fuel high-pressure pipe
to correct.
Be sure to use the genuine fuel high-
pressure pipe clamp and strictly observe
the specified tightening torque.
Check the following items and install the
fuel high-pressure pipe. If it has any
defect, replace the high-pressure pipe
with a new one since fuel may leak.
Be sure that the taper seal part of the
connection ((a) part: 2 mm area from the
tip-end) is free from longitudinal slits (b)
or pits (c) with visual check.
Be sure that part (d) (2 mm from the tip-
end) is free from steps which can be felt
50-36
Cylinder No.
1, 3
2, 4
by your fingernail. (Namely, this part must
be free from fatigue.)
1) Temporarily tighten the injector side of fuel
high-pressure pipe (54) to inlet connectors
(94) (4 pieces) with sleeve nut (95).
a Also temporarily tighten the common rail
side of the fuel high-pressure pipes with
sleeve nut.
2) Tighten mounting bolt (83) of injector holder
(84) to the specified torque.
Mounting bolt (83):
39.0 to 49.0 Nm {4.0 to 5.0 kgm}
3) Tighten the mounting sleeve nut of the fuel
high-pressure pipe on the injector side to the
specified torque.
Mounting sleeve nut:
39.0 to 44.0 Nm {4.0 to 4.5 kgm}
4) Tighten the mounting sleeve nut of the fuel
high-pressure pipe on the common rail side
to the specified torque.
Mounting sleeve nut:
39.0 to 44.0 Nm {4.0 to 4.5 kgm}
5) Install clamp (52) of fuel high-pressure pipe
(54).
6) Install fuel tube (56).
7) Install clamp (55).
8) Install fuel spray prevention cap (53) to each
sleeve nut of the fuel high-pressure pipes.
PC88MR-10