MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
210
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 4-7-25 Installing the engine oil pump
assembly
Step 1
Step 2
25 N·
m ± 3 N·
m
Turning angle: 90° ± 5 N·
m
Reinstalling the engine oil pump assembly
○
11
(1) Install the seal ring of engine oil pump into the
corresponding groove on the engine oil pump housing.
It should be installed to the bottom of the groove. There
should be no scratch, deflection and misplacement.
(2) Coat the front oil seal of crankshaft with lubricating
oil, and install it to the front oil seal hole of the engine oil
pump housing. After the installation, there should not be
scratch, deflection or misplacement.
Front oil seal installer: 5-8840-2361-0.
(3) Apply an appropriate amount of lubricating oil to the
inner surface of engine oil pump external rotor, and
install the external rotor to the engine oil pump cavity of
the upper cylinder body, with the side with the marks of
internal and external rotors on the same side.
Mobil API CI-4 lubricating oil
(4) Assemble the engine oil pump assembly and
cylinder body. Tighten the 10 hexagon bolt and plain
washer subassemblies (M8×40, M8×25 and M8×20) as
per the specified order and torque. See Fig. 4-7-25.
Tightening torque for fastening bolt of engine oil
pump
23N·
m±3N·
m
There should be no stagnation when the engine oil
pump pulley is rotating after the installation.
Fig. 4-7-26 Installing the upper body of oil pan
and tightening of bolts
Reinstalling the oil pan upper and lower body
assemblies and oil collector assembly
⑩
(1) Check if the dowel pin of the oil pan upper body is
installed correctly. Coat the junction surface between
the oil pan and the cylinder body with silicone plane
sealant. Install the oil pan upper body on the cylinder
body.
LOCTITE 587 plane sealant
Attention:
Make sure the junction surface
between the oil pan upper body and the cylinder body is
clean before reapplying glue.
(2) Install the oil pan upper body. Screw down the 15
hexagon flange face bolts (M8x25, M6x20, M6x110 and
Outer rotor
Seal ring
Front oil seal
