MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
352
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-19-17 Installing the thrust plate
shaft bearing shells, apply an appropriate amount of
lubricating oil.
Mobil API CI-4 lubricating oil
(2) Install the crankshaft position sensor signal panel to
the 8
th
crank arm of crankshaft. Tighten 3 hexagon
lobular socket countersunk head screws (M16×12) as
per specified torque.There should be no deflection or
improper mounting after installation, as shown in Fig.
5-19-18.
Tightening torque of hexagon lobular socket
countersunk head screw
9N·
m±3N·
m
Apply an appropriate amount of lubricating oil to the
upper bearing journal and the oil hole of crankshaft, and
install the crankshaft to the upper cylinder body:
Mobil API CI-4 lubricating oil
Axial clearance of the crankshaft
0.10~0.28mm
Fig. 5-19-18 Installing the crankshaft position
sensor signal panel
Removing the lower cylinder body
○
13
(1) Apply 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 the
upper cylinder body, with the side with the oil groove
facing the crank arm. Install the lower thrust plate in the
rabbet of the lower cylinder body, with the side with the
oil groove facing the crank arm.
Attention:
the lower thrust plate rather then the
upper thrust plate has a positioning lip. See Fig.
5-19-17.
(3) Apply the sealant to the top surface of the lower
cylinder body evenly, align the dowel pins of the upper
cylinder body to install the lower cylinder body, install 10
main bearing cap bolts (M11×1, 5×X87), and tighten
them by three steps and as per specified torque. See
Fig. 5-19-20.Install the 11 hexagon flange bolts (M8×80)
that fix and connect the upper and lower cylinder bodies
(M8×80), and tighten them as per specified torque. See
Fig. 5-19-19 and Fig. 5-19
—20.
LOCTITE510 anaerobic plane sealant.
Upper main shaft
bearing shell
Upper thrust plate
Crankshaft
Lower main shaft
bearing shel
Lower thrust plate
Crankshaft
Crankshaft
position signal
panel
Lower cylinder
body
Crankshaft
