MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
134
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 4-1-42 Installing the camshaft timing
pulley
Fig. 4-1-43 Installing the timing system
Fig. 4-1-44 Installing the timing system
Reinstalling the fuel inlet pipes of fuel injector and
fuel rail
③
(1) Remove the dust cap from the upper end of the fuel
injector. Install the fuel inlet pipe for the fuel injector, and
tighten evenly the pipe connectors at both ends of the 4
fuel pipe as per the specified torque, as shown in Fig.
4-1-41.
(2) Install the fuel inlet pipe of fuel rail, and tighten the
pipe connectors at both ends of the fuel pipe to the
specified torque. See Fig. 4-1-41.
Tightening torque for fuel inlet pipe connector of fuel
injector and fuel rail
32 N·
m±3 N·
m
Attention:
Tighten the pipe connectors at both ends
of the fuel injector fuel inlet pipe and ends of the fuel rail
fuel inlet pipe simultaneously and evenly during
installation so as to avoid pipe deformation.
Make sure the fuel inlet pipe of fuel injector and fuel
rail is sealed without leakage after installation.
Reinstalling the timing system
②
(1) Install the woodruff key to the exhaust camshaft,
install the timing pulley to the exhaust camshaft and
tighten the fastening bolt washer component to the
required torque. The camshaft timing pulley should be
pressed and installed to the right position without
deflection.
(2) Adjust the scale mark on camshaft timing pulley to
align it with the joint (at exhaust side) between cylinder
head and camshaft bearing cap. See Fig. 4-1-42.
Tightening torque for bolt washer component of
camshaft timing pulley
110 N·
m±5 N·
m
(3) Align the timing marks on damping pulley and timing
hood II. See Fig. 4-1-43.
(4) Align the timing mark on the fuel pump pulley with the
horizontal bar on the water pump housing. See Fig.
4-1-44.
(5) Install the timing belt. During the installation, make
sure the belts, except the timing tension pulley, are
connected with the pulley firmly without any looseness.
See Fig. 4-1-45.
(6) Install the timing tension pulley. Fix the limit bracket of
the timing tension pulley in the place where the bowl
Timing mark
Camshaft
timing pulley
Bone-line
Timing mark of damping
pulley
Damping pulley
Timing mark of
timing hood
component II
Fuel pump pulley
Timing mark
Horizontal
bar
