Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
299
Fig. 5-11-2 Removing the engine
accessories
Fig. 5-11-3 Removing the damping pulley
assembly
Fig. 5-11-4 Removing the timing system and
timing hood
Removal
Preparation
Remove the earthing cable of storage battery.
Removing the engine accessories
①
(1) Remove the generator belt: rotate the tension pulley
with a tool to disassemble the generator belt after it is
loosened enough.
(2) Remove the tension pulley assembly. See Fig. 4-11-2.
(3) Remove the accessory flat idle wheel assembly and
accessory wedge idle wheel assembly.
Removing the damping pulley assembly
②
(1) Remove the 4 hexagon flange bolts (M8×20)
fastening the damping pulley to the front end of the
crankshaft. See Fig. 5-11-3.
(2) Remove the damping pulley assembly from the front
end of crankshaft.
Removing the timing system
③
(1) Remove the timing hood and the timing hood
components
Ⅰ
and
Ⅱ
from the front end of the engine;
remove the timing rear hood from the front end of the
cylinder head. See Fig. 5-11-4.
(2) Remove the timing tension pulley.
(3) Remove the timing belt.
(4) Remove the timing idle wheel assembly.
(5) Remove the camshaft timing pulley.
(6) Remove the timing pulley of crankshaft.
(7) Remove the fuel pump pulley.
Installation
Installing the timing system
③
(1) Install the timing pulley of crankshaft: fit the woodruff
key and the crankshaft timing pulley to the crankshaft,
and tighten the bolt of crankshaft timing pulley according
to specified torque. The crankshaft timing pulley should
be properly fitted. See Fig. 5-11-5.
Tightening torque of fastening bolt of crankshaft
timing pulley
Timing pulley of crankshaft
