Komatsu ecot3 PC300LC-8 Shop Manual page 470

SEN02663-02
7. Supply pump IMV solenoid (FUEL REGU-
LATOR)
Electric priming pump (FUEL LIFT PUMP)
Water-in-fuel sensor intermediate connec-
tor (WIF)
a Disconnection and connection of con-
nector
The connector of the supply pump IMV
solenoid has a special locking mecha-
nism. Disconnect it according to steps (a)
– (b) and connect it according to steps (c)
– (d) as shown below.
Disconnection: (a) Unlock – (b) Discon-
nect connector.
Connection: (c) Connect connector – (d)
Lock.
a Precautions for connecting connector
Take care not to connect the connector
reversely.
Engage lock (e) on the wiring harness side
with triangular notch (f) on the sensor side
(Do not engage lock (e) with square guide
(g) on the opposite side of triangular notch
(f)).
6
8. Common rail pressure sensor (FUEL RAIL
PRESS)
a Disconnection and connection of connector
The connector of the common rail pres-
sure sensor has a special locking mecha-
nism. Disconnect it according to steps (a)
– (b) and connect it according to steps (c)
– (d) as shown below.
Disconnection: (a) Unlock – (b) Discon-
nect connector.
Connection: (c) Connect connector – (d) Lock.
9. Engine coolant temperature sensor (COOL-
ANT TEMP)
a Disconnection and connection of con-
nector
The connector of the engine coolant tem-
perature sensor has a special locking
mechanism. Disconnect it according to
steps (a) – (b) and connect it according to
steps (c) – (d) as shown below.
Disconnection: (a) Unlock – (b) Discon-
nect connector.
Connection: (c) Connect connector – (d)
Lock.
a Removal and installation of sensor
A deep socket is necessary for removal
and installation of the engine coolant tem-
perature sensor. See "Tools for testing,
adjusting, and troubleshooting".
30 Testing and adjusting
PC300, 350-8