MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
344
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-18-6 Removing the rear oil seal of
crankshaft
Installation
Installing the rear oil seal of crankshaft
④
(1) Use oil seal installer to install the rear oil seal of
crankshaft to the cylinder body. See Fig. 5-18-7.
Rear oil seal installer: 5-8840-2539-0.
Fig. 5-18-7 Installing the rear oil seal of
crankshaft
Fig. 5-18-8 Tightening order of fastening bolts
of flywheel
(2) Clean the iron rust and oddments on the pushed-in
part of the crankshaft rear oil seal.
Attention:
The pushed-in direction of the oil seal
(3) Install the connector of the special tool to the rear
end of the crankshaft with 2 bolts.
(4) Install the oil seal to the cylindrical surface of the
connector.
(5) Insert the socket into the connector, and tighten the
bolt (M12×1.75
，
L=70) until the end face of the
connector supports the socket.
(6) Remove the connector and the socket.
After installing the oil seal, check whether it is
installed properly.
Installing the flywheel gear ring assembly
③
Align the pin holes to install the flywheel gear ring
assembly to the rear end of crankshaft, and tighten 8
flywheel bolts according to the specified torque and
order. See Fig. 5-18-8.
Tightening torques for fastening bolts of flywheel
gear ring assembly
75N·
m±5N·
m
Installing the clutch assembly
②
(1) Driven disc assembly
——Grease the spline of the driven disc hub with
molybdenum disulfide grease.
