MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
200
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 4-6-11 Installing the timing system
Fig. 4-6-12 Installing the damping pulley
assembly
Fig. 4-6-13 Installing the engine accessories
Attention:
——Many fastening bolts are installed on the oil pan,
and all the bolts should be tightened. Otherwise, oil
leakage may occur.
——Make sure the junction surface between the upper
and lower bodies of oil pan is clean before reapplying
glue.
Reinstalling the timing system
③
(1) Reinstall the timing idle wheel assembly.
(2) Reinstall the timing belt. See Fig. 4-6-11.
(3) Reinstall the timing tension pulley. See Fig. 4-6-11.
(4) Reinstall the timing hood component I, timing hood
component II and timing hood. See Fig. 4-6-11.
Reinstalling the damping pulley assembly
②
(1) Place the elastic cylindrical pin in the timing pulley
pin hole of crankshaft.
(2) Align the damping pulley pin holes, install the
damping pulley to the front end of crankshaft, and
screw down the 4 hexagon flange face bolts (M8×20)
as per the specified torque. See Fig. 4-6-12.
Tightening torque for fastening bolt of damping
pulley
23N·
m±3N·
m
Attention:
After the installation, the timing mark of
the damping pulley should be set forward.
Reinstalling the engine accessories
①
(1) Reinstall the power steering pump assembly and its
bracket component.
(2) Reinstall the generator bracket and the generator
assembly. See Fig. 4-6-13.
(3) Reinstall the flat idle wheel assembly and wedge
idle wheel assembly.
(4) Reinstall the refrigeration compressor assembly.
(5) Reinstall the tension pulley.
(6) Reinstall the generator belt:Turn the tension pulley
with tools until the belt is loose enough, and then install
the generator belt. Make sure the belt wedge-shaped
teeth perfectly match the pulley wedge slots.
Crankshaft
Timing
pulley
Damping pulley
