MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
334
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-16-30 Installing the fuel inlet pipe and
fuel return hose component of the fuel injector
Fig. 5-16-31 Installing the camshaft timing
pulley
Fig. 5-16-32 Installing the timing system
(7) Install the fuel return hose.
——Use the DELPHI fuel injector. Insert respectively
the fuel return hoses into 4 injector heads and position
them in place. See Fig. 5-16-30.
——Use the 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 in the
holes at the upper ends of the 4 fuel injectors, and fix
them tightly with spring clips. Install the other long
connector to the fuel return tee on the high-pressure
pump, and fix it tightly with a clamp.
——Install the fuel return hose bracket and hose
clamps.
After the installation, make sure the fuel return
hose component is sealed so strictly that no fuel will
leak from the fuel return hose.
(8) Install the fuel inlet pipe of the fuel injector.
——Take off the dust covers at both ends of the fuel
inlet pipe of the fuel injector.
——Install the fuel inlet pipe of the fuel injector as
shown in Fig. 4-5-30 and tighten the pipe connectors to
the specified torque.
Tightening torque for the fuel inlet pipe connector of
fuel injector
32N·
m±3N·
m
Make sure the fuel pipe is sealed and there is no
fuel leakage after installation.
Attention:
Make sure to evenly tighten the two
connectors at both ends of the fuel injector fuel inlet
pipe at the same time in installation so as to avoid the
fuel pipe deformation and damage.
Installing the timing system
③
(1) Install the woodruff key to the exhaust camshaft,
install the timing pulley to the exhaust camshaft (see
Fig. 5-16-31) and tighten the fastening bolt and washer
component to the specified torque. The camshaft timing
pulley should be installed to the right position and
without deflection.
(2) Adjust the position of the scribed line on the
camshaft timing pulley till this position aligns with the
junction seam (on the exhaust side) between the
cylinder head and the camshaft bearing cap. See Fig.
5-16-31.
Fuel return hose
component
Fuel inlet pipe
of injector
Timing mark
Junction seam
Camshaft
timing pulley
Timing mark on damping pulley
Damping pulley
Timing mark on timing
hood component II
