MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
174
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 4-4-46 Installing the fuel injector
Fig. 4-4-47 Installing the fuel inlet pipe and
return hose of the fuel injector
groove.
——Install and tighten the fastening bolt washer
component of fuel injector ballast as per the required
torque, without gas leakage on the injector.
Tightening torque for fastening bolt component of
fuel injector ballast
25 N·
m~35 N·
m
——Install the fuel injector harness plug.
(9) Reinstalling the fuel return hose
——Use DELPHI fuel injector. Insert respectively the fuel
return hose components into the 4 injector heads and
position them in place. See Fig. 4-4-47.
——Use BOSCH or XINFENG fuel injector. Remove the
dust cap from the upper end of the fuel injector. Install 4
short connectors of the fuel return hose into the 4 holes
at the upper end of the fuel injector, and fix them tightly
with the spring clips. Install the other long connector to
the fuel return tee on the high pressure pump, and fix it
tight with a small steel elastic clip.
——Installing the fuel return hose support and clamps.
After installation, make sure the fuel return hose and
the fuel inlet pipe components are sealed so strictly that
no fuel will leak from them.
(10) Reinstalling the fuel inlet pipe of the fuel injector.
Install the fuel inlet pipe of the fuel injector as per Fig.
4-4-47, and evenly tighten the pipe connectors at both
ends of the fuel inlet pipe to the specified torque. After
installation, make sure the fuel pipe is sealed so strictly
that no fuel will leak from it
Tightening torque for fuel inlet pipe connector of fuel
injector
32 N·
m±3 N·
m
Sectional view
of cylinder
head cover
Fuel inlet
pipe of
injector
Fuel return
hose of fuel
injector
