MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
258
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-7-14 Installing the cylinder cover
assembly
Fig. 5-7-15 Installing the heater water return
pipe component
Fig. 5-7-16 Installing the water pipe
connecting component
(2) Install the copper washer and O-ring to the fuel
injector and make sure there is only one copper washer
on the fuel injector and the copper washer is laid flatly.
See Fig. 5-7-12.
(3) According to the numbers 1, 2, 3 and 4 on the fuel
injectors, install the fuel injectors to the corresponding
fuel injector mounting holes in the cylinder heads 1, 2, 3
and 4. See Fig. 5-7-13.
(4) Place one end of the fuel injector ballast on ballast
supporting bolt and the other end in fuel injector ballast
groove.
(5) Install and tighten the fastening bolt components of
fuel injector ballast with the required torques. No air
leakage is allowed at the injector gasket.
Tightening torque for fastening bolt component of
fuel injector ballast
25N·
m~35N·
m
Installing the cylinder cover assembly
⑦
(1) Check whether the cylinder cover packing is in good
condition, and embed it into the sealing groove of the
cylinder cover. See Fig. 5-7-14.
(2) Install the cylinder cover to the cylinder head; tighten
16 hexagon flange face bolts (M6×20) of the fastening
cylinder cover to the cylinder head as per specified
torque. See Fig. 5-7-14.
Tightening torque for fastening bolt of cylinder
cover
9N·
m±3N·
m
Installing the heater water return pipe component
⑥
(1) Install the heater water return pipe component.
Tighten the 2 hexagon flange face bolts (M6×16)
connecting the heater water return pipe to the cylinder
cover. See Fig. 5-7-15.
(2) Tighten the hexagon flange face bolt (M8×16)
connecting the heater water return pipe and cylinder
cover. See Fig. 5-7-15.
Tightening torque for fastening bolt of heater water
return pipe component
M6×16
9N·
m±3N·
m
Cylinder cover
Packing
Water outlet pipe
connecting
component
Cylinder cover
