Komatsu PC200-8M0 Shop Manual page 996

SEN06143-00
Reference
q Handling of fuel pressure sensor (PS) and
relief valve (RV)
1. Fuel pressure sensor (PS).
a 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.
a Do not remove fuel pressure sensor (PS)
from common rail (CR) for a purpose other
than replacement.
a Once the fuel pressure sensor (PS) is
removed from the common rail (CR), be
sure to replace it.
q Fuel pressure sensor (PS), if necessary,
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
(PS).
3) Install a new fuel pressure sensor.
2
Threaded part of fuel pressure
sensor:
3
Fuel pressure sensor:
4) Connect the engine wiring harness.
At this time, take care not to connect
the wiring harness in reverse.
5) Start the engine and check that fuel
does not leak.
a For the testing procedure, see
Testing and adjusting, "Measur-
ing fuel return rate and leakage".
34
50-200
Gear oil (#90)
70 ± 5 Nm {7.1 ± 0.5 kgm}
200 Engine and cooling system
Removal and installation of cylinder head assembly
2. Relief valve (RV)
a If the leakage from the relief valve (RV)
exceeds the specified value, do not reuse
it.
q Replace relief valve (RV), if necessary,
according to the following procedure.
1) Before removing the fuel pressure
sensor, remove mud etc. from around
it thoroughly and clean it.
2) Remove relief valve (RV).
3) Check that high-pressure seal sur-
faces (A) of the relief valve (RV) and
rail (CR) are free from damage.
4) Install a new relief valve (RV).
2
Threaded section:
3
Relief valve:
100 ± 4 Nm {10.2 ± 0.4 kgm}
a Excessive tightening can cause
leakage. Take care not to tighten
too strongly.
5) Start the engine and check that fuel
does not leak.
a For the testing procedure, see
Testing and adjusting, "Measur-
ing fuel return rate and leakage".
[*12]
3
Air tube clamp:
10.0 – 11.0 Nm {1.02 – 1.12 kgm}
[*13]
MIKALOR clamp
q
a Reference
Length of insertion: 40 mm (turbocharger side)
a Refer to [*4].
PC200, 200LC, 220, 220LC-8M0
Gear oil (#90)