Komatsu ecot3 PC300LC-8 Shop Manual page 896

SEN02636-03
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]
a Clean the inside of the hose connector and
insert the connector securely.
[*4]
a Tighten bracket (16) to the following torque.
3
Mounting bolt:
[*5]
a Do not remove fuel pressure sensor (36a) from
common rail (36) for a purpose other than
replacement.
a Once the fuel pressure sensor is removed from
the common rail, be sure to replace it.
a Replace fuel pressure sensor (36a), if neces-
sary, according to the following procedure.
1) Before removing the fuel pressure sensor,
remove mud etc. from around it thoroughly
and clean it.
2) Remove the fuel pressure sensor.
3) Check the fuel pressure sensor connector
for crack, breakage, damage of the seal,
foreign matter on the pin and corrosion,
bend and breakage of the pin.
4) Install a new fuel pressure sensor.
2
Threaded part of fuel pressure
sensor: Gear oil (#90)
3
Fuel pressure sensor:
18
43 ± 6 Nm {4.4 ± 0.6 kgm}
70 ± 5 Nm {7.1 ± 0.5 kgm}
50 Disassembly and assembly
5) Connect the engine wiring harness. At this
time, take care not to connect the wiring
harness in reverse.
6) Start the engine and check that fuel does
not leak.
For the testing procedure, see Testing and
adjusting, "Testing fuel system for leak-
age".
a Replace relief valve (36b), if necessary,
according to the following procedure.
1) Before removing the relief valve (36b),
remove mud etc. from around it thoroughly
and clean it.
2) Remove the relief valve (36b).
3) If the leakage from the relief valve
exceeds the specified value, do not reuse
it.
4) Check that high-pressure seal surfaces
(a) of the relief valve and rail are free from
damage.
5) Check that the adapter (36c) is free from
flaw.
6) Install the relief valve.
2
Threaded part of relief valve:
3
Relief valve:
100 ± 4 Nm {10.2 ± 0.4 kgm}
Excessive tightening can cause leak-
age. Take care not to tighten too
strongly.
7) If adapter (36c) was removed, use a new
copper washer (36d) and coat the adapter
with gear oil #90 and tighten it.
2
Threaded part of adapter:
3
Adapter:
8) Start the engine and check that there is no
leakage.
For the testing procedure, see Testing and
adjusting, "Testing fuel system for leak-
age".
Gear oil (#90)
Gear oil (#90)
37 ± 4 Nm {3.8 ± 0.4 kgm}
PC300, 350-8