MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
208
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 4-7-20 Installing the crankshaft
Fig. 4-7-21 Installing the lower cylinder body
(3) Coat the main bearing journal of crankshaft and the
oil hole with an appropriate amount of lubricating oil,
and install the crankshaft in the upper cylinder body.
Crankshaft axial clearance
0.10~0.28mm
Mobil API CI-4 lubricating oil.
Reinstalling the lower cylinder body
○
14
(1) Coat an appropriate amount of lubricating oil
between the crankshaft thrust plate and crank arm
thrust surface.
Mobil API CI-4 lubricating oil
。
(2) Install the upper thrust plate in the rabbet of upper
cylinder body, with the side with oil groove facing crank
arm. Install the lower thrust plate in the rabbet of lower
cylinder body, with the side with oil groove facing crank
arm.
Attention:
There is no positioning lip on the upper
thrust plate. The lower thrust plate has a positioning lip.
(3) Evenly coat sealant on the top surface of lower
cylinder body. Align the lower cylinder body with the
location sleeve of upper cylinder body, and install the
lower cylinder body. Install the 10 main bearing cap
bolts (M11x1.5x87) and tighten them by 3 steps as per
the specified order and torque. Install the 11 hexagon
flange face bolts (M8x80) fastening the upper and lower
cylinder bodies, and tighten them as per the specified
torque. See Fig. 4-7-20.
LOCTITE510 anaerobic plane sealant
Attention:
Before applying sealant on the lower
cylinder body, make sure the junction surface between
the upper and lower cylinder bodies is clean.
Tightening torque for fastening bolt of main
bearing cap and lower cylinder body
Main bearing cap bolt
(tightening by 3 steps)
40 N·
m ± 3 N·
m
Turning for 90° and
turning for another 90°
Hexagon flange face bolt
23 N·
m ± 3 N·
m
Crankshaft
Lower cylinder
body
Lower cylinder
body
Upper cylinder
body
