Komatsu Galeo PC800-8 Shop Manual page 928

SEN01054-01
6. Install connector (102).
a Install the connector before installing the
high-pressure pipe.
7. High-pressure pipe
k
Before installing the high-pressure
pipe, check it for the following defects.
If there is any of these defects, it can
cause fuel leakage. Accordingly,
replace the high-pressure pipe.
Check the taper seal of the connect-
q
ing part (Part (a): Part of 2 mm from
the end) for visible lengthwise slit (b)
and dent (c).
Check part (d) (end of the taper seal:
q
P a r t a t 2 m m f r o m t h e e n d ) f o r
stepped-type wear (fatigue) which
your nail can feel.
1) Put sleeve (126) of high-pressure pipes
(101) in the fuel high-pressure pipe inser-
tion part and tighten it temporarily.
a Check that the O-rings are fitted to
both of the injector and sleeve nut.
2) Rotate sleeve nut (127) by 2 turns with the
fingers on the threads of the injector, and
then tighten sleeve nut (127) with a span-
ner (do not tighten it permanently at this
time).
18
50 Disassembly and assembly
a If sleeve nut (127) does not catch the
threads of the injector, press its end
with another small spanner etc. and
rotate its hexagonal part with the
spanner.
a After tightening sleeve nut (127),
check that the O-ring is not projected
from the end of sleeve nut (127).
3) Tighten mounting bolts (113) of holder
(122) permanently.
3
Holder mounting bolt:
58.8 – 73.5 Nm {6.0 – 7.5 kgm}
4) Tighten sleeve nut (127) of high-pressure
pipe (101).
a Tighten the common rail side, too.
a Control the tightening torque with
torque wrench [1] of spanner type.
3
Sleeve nut:
39.2 – 49 Nm {4 – 5 kgm}
PC800, 850-8