MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
450
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 9-2-2 Removing the turbocharger intake
hose
Fig. 9
–2-3 Removing the air cleaner
Fig. 9-2-4 Removing the Catalytic Converter
Pipe
Removal
Preparation
Disconnect the earthing cable of the storage battery.
Removing the turbocharger intake hose
①
(1) Loosen the clamps at the intake hose and the air
gas compressor housing of the turbocharger. See Fig
9-2-2.
(2) Pull out the connector of crankcase vent hose
Removing the air cleaner
②
(1) Remove the air cleaner harness connector.
(2) Remove the hose connected with the intake pipe of
the turbocharger.
(3) Remove the fastening bolt connecting the air
cleaner and the body and take off the air cleaner. See
Fig. 9-2-3.
The air cleaner filter core should be replaced in the
following cases:
-
——Maintenance and replacement period is due
-
——The filter core is seriously polluted and the dirts
are difficult to remove.
-
——The filter core is deformed and damaged.
Removing the catalytic converter pipe
③
(1) Remove the bolt and nut connecting the catalytic
converter pipe and the turbocharger or the front
exhaust pipe.
(2) Remove the catalytic converter pipe and the sealing
gaskets at its both ends. See Fig. 9-2-4.
(3) Check the sealing gasket of the catalytic converter
pipe, and replace those damaged or deformed ones.
Air flow sensor
Filter core
Turbocharger
intake hose
Catalytic
converter
Mounting support for
the front exhaust pipe
Front exhaust
pipe
