MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
324
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-16-2 Removing the engine assembly
Fig. 5-16-3 Removing the engine accessories
Fig. 5-16-4 Removing the timing system
Removal
Removal precautions
The used piston and connecting rod assemblies are not
interchangeable, so check whether there are serial
numbers of cylinders or matching marks on the sides of
the piston top, connecting rod and its cover before
removal.If there is no mark or the marks are illegible,
make up the marks for removal to ensure they can be
reinstalled as they are. After disassembly, the parts for
the same cylinder should be kept at one place to avoid
disorder.
Preparation
(1) Disconnect the earthing cable of storage battery.
(2) Drain the cooling system of coolant.
(3) Drain out the engine oil in the lubrication system of
the engine.
Warning:
When draining out the engine oil, the hot
oil may cause burn. Handle the used oil properly to
protect environment.
Attention:
To install the oil drain screw plug, use a
new copper washer.
Tightening torque for the oil drain screw plug
40N·
m±5N·
m
Removing the engine assembly
①
(1) Remove the fastening nuts of engine bracket.
(2) Remove the catalytic converter.
(3) Remove the generator belt, the power steering
pump and the refrigeration compressor.
(4) Connect the hook to the crane to lift the engine
carefully, as shown in Fig. 5-16-2.
(5) After being raised, the head of the engine should be
higher than the tail.
(6) Place the engine steadily on the maintenance rack
for repair, removal and reinstallation.
Attention:
When taking out the engine, do not
damage the oil pipe, brake pipe, sensors and electric
elements.
Engine hook
