Komatsu PC200-8M0 Shop Manual page 973

200 Engine and cooling system
Removal and installation of fuel injector assembly
1. Install and fasten lightly high pressure-pipes
(25) to (30) between common rail (24) and
cylinder head.
3
Sleeve nut:
0.2 to 0.8 Nm {0.02 to 0.08 kgm}
2. Fasten high-pressure pipes (25) to (30)
according to the following procedure.
3
Sleeve nut:
35 ± 3.5 Nm {3.6 ± 0.4 kgm}
1) Cylinder head side of high-pressure pipes
(25) and (30)
2) Common rail side of high-pressure pipes
(30) and (25)
3) Cylinder head side of high-pressure pipes
(26), (27), (28), and (29) in order
4) Common rail side of high-pressure pipes
(26), (27), (28), and (29) in order
3. Install the cap to each high-pressure pipe.
a Install each cap with the slits out and
down.
a The cap is installed for fire prevention and is
expected to prevent fuel from flying directly
to highly heated portions of the engine if fuel
leaks.
PC200, 200LC, 220, 220LC-8M0
[*5]
q Fuel pressure sensor and relief valve
1) Replace fuel pressure sensor (2), if neces-
sary, according to the following procedure.
a Do not remove fuel pressure sensor
(2) from common rail (1) unless
replacement of the sensor is neces-
sary.
a Once the fuel pressure sensor is
removed from the common rail, be
sure to replace it with a new one.
1] Before removing the fuel pressure
sensor, clean around it to remove
mud, etc. thoroughly.
2] Remove the fuel pressure sensor.
3] Check the fuel pressure sensor con-
nector for crack, breakage, damage
of the seal, foreign material on the
pin, and corrosion, bend, and break-
age of the pin.
4] Install a new fuel pressure sensor.
2
Threaded portion of fuel pressure
sensor:
3
Fuel pressure sensor:
5] Connect the engine wiring harness.
At this time, take care not to connect
reversely.
6] Start the engine and check that there
is no leakage.
For the testing procedure, see Testing
and adjusting, "Testing fuel system for
leakage".
SEN06143-00
Gear oil (#90)
70 ± 5 Nm {7.1 ± 0.5 kgm}
50-200
11