Komatsu 114E-3 Series Shop Manual page 329

50 Disassembly and assembly
24. Fuel injector assembly
a Check that the injector sleeve is free from
flaw and dirt.
a When replacing the injector, replace the
inlet connector, too.
a Check the inlet connector for the following
items. If it is defective, replace it.
a] If there are burrs or deformation at
the inlet or outlet of the connector, do
not use the inlet connector.
b] If the edge filter is clogged or dirty or
there is sediment in it, do not use the
inlet connector.
c] If the O-ring is broken or deteriorated,
do not use the inlet connector.
d] If the sealing surface of the outlet side
is worn, in contact unevenly or has a
trace of leakage, do not use the inlet
connector.
If high-pressure fuel leaks, the seat
s u r f a c e i s e r o d e d a n d h a s f i n e
streaks or flaws. If there are such
streaks or flaws, replace the connec-
tor and injector.
114E-3 Series
1) Fit the gasket and O-ring to injector (7).
2) Apply engine oil (EO15W-40) to the O-ring
of injector (7) and head side.
3) Insert injector (7) in the cylinder head,
directing its fuel inlet hole toward the air
intake manifold.
4) Install holder (6) and tighten bolts (5) by 3
– 4 turns by hand.
5) Coat the O-ring of inlet connector (11) and
the mounting hole on the head with engine
oil (EO15W-40).
6) Install inlet connector (11) temporarily with
retainer (10).
3
Retainer:
15 ± 5.0 Nm {1.5 ± 0.5 kgm}
SEN00464-01
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