MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
138
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 4-2-2 Removing the engine accessories
Fig. 4-2-3 Removing the timing system
Fig. 4-2-4 Removing the fuel inlet pipe and
fuel return hose components of the fuel
injector
Disassembly
Disassembling the engine accessories
①
(1) Remove the generator belt
Turn the tension pulley with tools until the belt is loose
enough, and then remove the engine belt, as shown in
Fig. 4-2-2.
(2) Remove the wedge idle wheel.
Loosen the fastening bolts of the wedge idle wheel, and
then remove the wedge idle wheel.
Disassembling the timing system
②
(1) Remove timing hood component I and the timing
hood. See Fig. 4-2-3.
(2) Removing the timing belt: Loosen the timing tension
pulley to disassemble the timing belt after it is loosened
enough. See Fig. 4-2-3.
(3) Removing the timing tension pulley assembly:
Loosen the combined fastening bolt of timing tension
pulley and remove the camshaft timing belt pulley.
(4) Removing the camshaft timing pulley: Loosen the
bolt component of camshaft timing pulley and remove
the camshaft timing pulley.
Disassembling the fuel inlet pipe component of the
fuel injector
③
(1) Loosen evenly the pipe connectors at both ends of
the 4 fuel injectors with a spanner.
(2) Take off the 4 fuel inlet pipes of the fuel injector
respectively. See Fig. 4-2-4.
Attention:
——When removing the fuel inlet pipe of the fuel
injector, loosen the pipe connectors at both ends of the
fuel pipe simultaneously and evenly to prevent the fuel
pipe from deforming.
——After removing the fuel inlet pipe of the fuel injector,
use plug covers to cover the fuel inlet of the fuel injector,
the fuel port of the high pressure fuel rail, and both ends
of the fuel inlet pipe of the fuel injector, so as to prevent
sundries from blocking the fuel injector.
Rotary
installation
position of
tension pulley
Generator
belt
Fuel return hose of
fuel injector
Fuel inlet pipe of
injector
