MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
408
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 6-2-19 Removing the engine accessory
Fig. 6-2-20 Removing the timing belt
Fig. 6-2-21 Removing the fuel inlet pipe of
fuel rail
Removal
Removing the engine accessory
①
(1) Remove the generator belt: rotate the tension pulley
by a tool to make the generator belt loose enough, and
then remove the generator belt.
(2) Remove the accessory tension pulley.
(3) Remove the flat and wedge idle wheel assemblies of
accessory as shown in Fig. 6-2-19.
Removing the timing belt
②
(1) Remove timing hood, timing hood
Ⅰ
and
Ⅱ
.
(2) Loosen the timing tension pulley to slack the belt and
then remove it as shown in Fig. 6-2-20.
Remove the fuel pump pulley
③
(1) Remove the all-metal hexagon flange locknuts
(M14×1.5), which is used to fasten the fuel pump pulley
to the fuel pump.
(2) Take off the fuel pump pulley from the fuel pump.
Removing the fuel inlet and outlet hoses of
high-pressure fuel pump
④
Pull the fuel inlet and outlet hoses of high-pressure fuel
pump out from their connectors.
Removing the fuel inlet pipe component of fuel rail
⑤
(1) Loosen the pipe connectors on the fuel rail and furl
pump ends of fuel inlet pipe of fuel rail as shown in Fig.
6-2-21.
(2) Remove the hexagon flange bolt (M6×12), which is
used to fasten the pipe clamp components for fuel inlet
pipe of fuel rail to the air intake manifold pipe.
(3) Remove the fuel inlet pipe components of fuel rail.
Fuel return hose
component
Fuel inlet pipe of
fuel injector
Fuel inlet pipe of fuel rail
