Great Wall GW4D20 Maintenance Manual page 349

Chapter V GW4D20 / GW4D20B Turbocharged Diesel Engine
Engine oil
pump
Front oil seal
of crankshaft
Fig. 5-17-5 Removing the front oil seal of
crankshaft
Engine oil pump
Front oil seal of
crankshaft
Fig. 5-17-6 Installing the front oil seal of
crankshaft
Fig. 5-17-7 Installing the timing pulley of
crankshaft
Removing the front oil seal of crankshaft ⑥
(1) Use an oil seal remover or a plastic hammer and a
screwdriver to knock around the front oil seal of crankshaft
and then remove it from the hole on the engine oil pump, as
shown in Fig. 5-17-5.
Crankshaft
front oil seal of crankshaft when removing it.
(2) Check the front oil seal of crankshaft. Replace it in case
of any deformation or damage.
Installing the front oil seal of crankshaft ⑥
(1) Apply an appropriate amount of lubricating oil to the
front oil seal of crankshaft.
(2) Press the front oil seal of crankshaft into the
corresponding hole on the engine oil pump with special
tools. See Fig. 5-17-6.
(3) After installation, check the oil seal. Any scratch,
deflection or poor installation is forbidden.
Installing the timing pulley of crankshaft ⑤
(1) Install the woodruff key onto the crankshaft, install the
timing pulley of crankshaft to the crankshaft, and then
tighten the fastening bolts to the specified torque. See Fig.
5-17-7.
(2) After installation, check whether the timing pulley of
Timing belt
crankshaft is installed properly and without deflection.
timing pulley
Installing the timing belt ④
(1) Install the timing belt. During the installation, make sure
the belts, except the tension pulley, are connected with the
pulley firmly and without any looseness. See Fig. 5-17-8.
(2) Install the timing tension pulley: Fix the limit bracket of
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Front oil seal remover: 5-8840-2362-0.
Attention: Do not damage the mating surface of the
Installation
Mobil API CI-4 lubricating oil
Installer of front oil seal: 5-8840-2361-0.
Tightening torque for the fastening bolt of crankshaft
185N· m~195N· m
339