Komatsu ecot3 PC300-8, Shop Manual

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50 Disassembly and assembly SEN02636-03
PC300, 350-8
3
16. Remove front gear cover cap (20).
17. Rotate the crankshaft forward to set stamp (m)
of supply pump drive gear (21) to the top and
set the No. 1 cylinder to the compression top
dead center (TDC).
18. Remove nut (22) and washer (23) from supply
pump drive gear (21).
19. Install tool A1 with bolts [1] (M8 x 1.25).
20. Remove 4 nuts (24).
21. Push in tool A1 installed in step 19 and remove
fuel supply pump assembly (25).
Installation
Carry out installation in the reverse order to
removal.
[*1]
a
Tighten the hose clamps before and after the
air intake tube to the following torque.
3 Hose clamp: 9.8 ± 0.5 Nm {1 ± 0.05 kgm}
[*2]
a
Adjust the belt tension. For details, see Test-
ing and adjusting, "Testing and adjusting air
conditioner compressor belt".
[*3]
k Don't correct high-pressure tube by bend-
ing it for re-use.
k Always use genuine clamp for fixing high-
pressure pipe. Strictly observe the tighten-
ing torque requirements.
k Keep the harness assembly and other har-
nesses 10 mm and above away from the
high-pressure tube.
a
Before installing the high-pressure pipe, check
it for the following defects. If there are any of
these defects, it can cause fuel leakage.
Accordingly, replace the high-pressure pipe.
q Check the taper seal of the connecting part
(Part (a): Part of 2 mm from the end) for visible
lengthwise slit (b) and dent (c).
q Check part (d) (end of the taper seal: Part at 2
mm from the end) for stepped-type wear
(fatigue) which your nail can feel.