MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
340
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
Fig. 5-17-8 Installing the timing belt
Fig. 5-17-9 Installing the timing hood
component
the timing tension pulley in the place where the bowl
shaped plug is to be installed on the cylinder head. After
that, use a hexagon socket head spanner to adjust the
mounting pin of the timing tension pulley to be aligned with
the notch, and tighten the timing tension pulley bolts to the
specified torque.
Tightening torque for the fastening bolt of timing
tension pulley
22N·
m~26N·
m
Installing the timing hood
③
——Align the mounting holes to install the timing hood and
tighten the 5 hexagon flange face bolts (M8×35 and
M8×50) to the specified torque. See Fig. 5-17-9.
Tightening torque for the fastening bolt of timing hood
45N·
m±3N·
m
——Fit the seal strips I and II of the timing hood into the
sealing grooves I and II of the timing hood respectively.
——Align the mounting holes to install the timing hood
components I and II, and tighten the 10 hexagon flange
face bolts (M6×16) to the specified torque.
Tightening torque for the fastening bolt of timing hood
components I and II
9N·
m±3N·
m
Fig. 5-17-10 Installing the damping pulley
assembly
Installing the damping pulley assembly
②
(1) Install the spring pin into the pin hole on the crankshaft
timing belt pulley.
(2) Align the damping pulley pin holes, install the damping
pulley to the front end of crankshaft, and screw down 4
hexagon flange face blots (M8×20) to the specified torque.
See Fig. 5-17-10.
Tightening torque for the fastening bolt of damping
pulley
23N·
m±3N·
m
Attention:
The timing mark of the damping pulley
should be set forward.
Timing pulley
Timing tension
pulley
Crankshaft
Timing
pulley
Damping pulley
