MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
254
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-7-2 Removing the engine accessories
Fig. 5-7-3 Removing the timing system
Fig. 5-7-4 Removing the fuel inlet pipe and
fuel return hose components of the fuel
injector
Removal
Preparation
(1) Disconnect the earthing cable of storage battery.
(2) Drain out the coolant from the engine and the
radiator.
Warning:
The coolant is poisonous, thus must be
stored in the original container to avoid the direct touch
from human.
Removing 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 generator belt.
(2) Removing the wedge idle wheel assembly
Loosen the fastening bolts of the wedge idle wheel, and
then remove the wedge idle wheel assembly. See Fig.
5-7-2.
Removing the timing system
②
(1) Remove the timing hood component I and timing
hood. See Fig. 5-7-3.
(2) Remove the tension pulley assembly. See Fig.
5-7-3.
(3) Remove the timing belt.
(4) Remove the camshaft timing pulley.
Removing the fuel inlet pipe component of fuel
injector
③
(1) Loosen evenly the pipe connectors fastening the 4
fuel injector fuel inlet pipes with spanner.
(2) Take off the 4 fuel inlet pipes of the fuel injector
respectively. See Fig. 5-7-4.
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 clean 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
component
Fuel inlet
pipe of
injector
