Komatsu PC210-8, Shop Manual

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50 Disassembly and assembly UEN00660-00
PC210, 230, 240-8
27
[*9], [*10]
q
High-pressure pipes and common rail
k
Do not use high-pressure pipes with bend-
ing modification.
k
Be sure to use a genuine high-pressure
pipe fixing clamp and observe strictly the
tightening torque.
a
A high-pressure pipe which has depressions
such as visible vertical slit scar (b), patchy scars
(c) etc. on the taper seal section of its connector
((a) part: within 2 mm from the tip), or a high-
pressure pipe whose (d) part (end of the taper
seal section: 2 mm from the tip) catches on a fin-
ger nail due to fatigue, may cause fuel leakage.
In these cases, replace the high-pressure pipe.
1) Assemble common rail (25) and high-
pressure pipes (71) – (76) temporarily.
3
Sleeve nut and mounting bolt:
0.2 – 0.8 Nm {0.02 – 0.08 kgm}
2) Tighten high-pressure pipes (71) – (76)
according to the following procedure.
3
Sleeve nut:
35 ± 3.5 Nm {3.6 ± 0.4 kgm}
1] Head side of high-pressure pipes (71)
and (76)
2] Common rail side of high-pressure
pipes (76) and (71)
3] Head side of high-pressure pipes
(72), (73), (74) and (75)
4] Common rail side of high-pressure
pipes (72), (73), (74) and (75)
3) Tighten the sleeve nut of high-pressure
pipe (22) temporarily.
4) Tighten high-pressure pipe (22) in the
order of firstly pump (FSP) side, then com-
mon rail (25) side.
3
Sleeve nut:
35 ± 3.5 Nm {3.6 ± 0.4 kgm}
5) Tighten clamp (21) of high-pressure pipe
(22).
3
Mounting bolt:
24 ± 4 Nm {2.4 ± 0.4 kgm}
6) Tighten common rail (25) with four bolts.
a
Coat the two bolt threads on the inner
side of the engine with sealant (LG-
7).
3
Mounting bolt:
24 ± 4 Nm {2.4 ± 0.4 kgm}
7) Install bellows (23) to each high-pressure
pipe. (14 pieces)
a
Set the slits of each bellows out and
down.
a
The bellows are installed so that fuel
will not spout over the hot parts of the
engine and catch fire when it leaks for
some reason.
a
FSP: Fuel supply pump
[*11]
3
Air tube clamp:
10.0 – 11.0 Nm {1.02 – 1.12 kgm}
[*12]
q
MIKALOR clamp
a
Reference
Length of insertion: 40 mm (turbocharger side)
a
Refer to [*3].
[*13]
3
Lubrication inlet hose tightening nut:
35 ± 5 Nm {3.5 ± 0.5 kgm}
3
Lubrication outlet hose mounting bolt:
24 ± 4 Nm {2.4 ± 0.4 kgm}