MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
212
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Reinstalling the oil filter assembly and oil cooler
assembly
⑨
(1) Check if the seal ring of oil cooler is installed
correctly. Align the location notch on the oil cooler with
the installation mark on the cylinder body, and then
install the oil cooler on the oil filter seat of cylinder body.
Fig. 4-7-30 Installing the heater water return
connecting hose and heater water return pipe
component
Fig. 4-7-31 Installing the thermostat cap and
thermostat
Fig. 4-7-32 Installing the flywheel gear ring
assembly
(2) Insert the pipe connector of oil filter into the hole on
the oil cooler assembly and screw it into the cylinder
body. After the installation, the oil cooler should be tight
without oil leakage at the seal ring.
(3) Check if the seal ring of oil filter assembly is installed
correctly. Screw the oil filter onto the pipe connector and
turn it for another 3/4~1 circle when the seal ring
touches the oil cooler.
After the installation, there should be no oil
leakage at the seal ring of oil filter.
Spanner for the oil filter: 5-8840-0020-0.
Reinstalling the heater water return connecting
hose and heater water return pipe component
⑧
(1) Insert the heater water return conencting hose into
the pipe connector and fasten it with single-ear stepless
clips. Fix it on the cylidner body with clamps and
hexagon flange face bolts (M8x16). See Fig. 4-7-30.
(2) Use single-ear stepless clips to connect one end of
the heater water return pipe component with the heater
water return conencting hose. Fix the other end on the
vacuum adjuster seat.
Reinstalling
the
thermostat
assembly
and
thermostat cap
⑦
(1) Install the thermostat shield in the thermostat
chamber properly.
(2) Check if the rubber seal ring of thermostat assembly
is installed correctly. Place the thermostat assembly in
the thermostat shield of cylinder body. See Fig. 4-7-31.
(3) Install the thermostat cap on the thermostat seat.
Screw down the 2 hexagon flange face bolts (M6x20) to
the cylinder body as per the specified torque.
After the installation, the pipe opening of the
thermostat cap should face the lower part of the front
end of diesel engine, and there should be no water
dripping at the joint.
Tightening torque for fastening bolt of thermostat
cap
9N·
m±3N·
m
Reinstalling the flywheel gear ring assembly
⑥
(1) Install the cylindrical pin in the pin hole of the flange
at the rear of crankshaft.
Water return
pipe
component of
heater
Water return
connecting
hose of
heater
Thermostat shield
Thermostat cap
Thermostat
Crankshaft
position signal
panel
Crankshaft
Flywheel gear
ring assembly
