MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
268
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-8-14 Installing the fuel injector
assembly
Fig. 5-8-15 Installing the fuel injector
assembly
Fig. 5-8-16 Installing the cylinder cover
assembly
Installing the fuel injector assembly
⑧
(1) Tighten the support bolts of the fuel injector ballast
by the required torques onto the cylinder head.
Tightening torque for supporting bolt of fuel injector
ballast
23N·
m±3N·
m
(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. 5-8-14.
(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. 5-8-15.
(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 by the required torques.
Tightening torque for fastening bolt component of
fuel injector ballast
25N·
m~35N·
m
No air leakage is allowed at the injector gasket after
installation.
Installing the cylinder cover assembly
⑦
(1) Clean the inside of the sealing groove of the cylinder
cover.
(2) Embed the cylinder cover packing into the sealing
groove of the cylinder cover. See Fig. 5-8-16.
(3) 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. 5-8-16.
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
Fuel injector
assembly
Sectional view
of cylinder
cover
Cylinder cover
Packing
