Chpter IV Mechanical System
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
161
Fig. 4-4-11 Removing the lower cylinder body
Fig. 4-4-12 Removing the crankshaft and the
signal panel
Fig 4-4-13 Measuring the thrust clearance of
the crankshaft
Disassembling the lower cylinder body
⑩
(1) Remove 10 main bearing cap bolts orderly.
(2) Remove the 11 hexagon flange face bolts (M8×80)
connecting the upper and the lower cylinder body in
proper order. See Fig. 4-4-11.
(3) Remove the lower cylinder body from the upper
cylinder body.
Attention:
Remove the fastening bolts of the lower
cylinder body in the order from the two sides of cylinder
body to the middle.
Disassembling the crankshaft and crankshaft
position signal panel
○
11
(1) Remove the 3 hexagon lobular socket countersunk
head screws for fastening the signal panel to the
crankshaft rear part. See Fig. 4-4-12.
(2) Take down the signal panel from the rear end of the
crankshaft.
(3) Remove the crankshaft from the cylinder body.
Inspection and repair
The parts should be adjusted, repaired or replaced if
any excessive worn or damage is detected during
inspection.
1. Check the thrust clearance of the
crankshaft
Install the dial indicator as per Fig 4-4-13, and measure
the thrust clearance of the crankshaft. Replace the
thrust plate in group if the thrust clearance exceeds
specified limit value.
Thrust clearance of the crankshaft
Standard
0.10~0.28 mm
Lower cylinder body
Upper cylinder body
Crankshaft position
signal panel
Crankshaft
Flywheel gear
ring assembly
