MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
164
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 4-4-20 Installing the crankshaft
Fig. 4-4-21 Installing the main shaft bearing
shell
While selecting or installing a new bearing shell of the
crankshaft, pay attention to the diameter dimension
marks of the journal hole in the cylinder body and the
marks of the main bearing journal of crankshaft.
Reassembly
Reinstalling the crankshaft and crankshaft position
signal panel
○
11
(1) Select the main shaft bearing shell as per Table
4-4-1 and Table 4-4-2.Install the upper main shaft
bearing shells with oil grooves and oil holes to the
upper cylinder body, and install the lower main shaft
bearing shells without oil grooves or oil holes to the
lower cylinder body. See Fig. 4-4-21.Reversed installing
is no allowed! Apply an appropriate amount of
lubricating oil after the installation.
Mobil API CI-4 lubricating oil
Upper main shaft
bearing shell
Upper thrust plate
Lower main shaft
bearing shell
Lower thrust plate
Crankshaft
