JAC HFC7151M1V-U221B Workshop Manual page 45

Attention:
■ Be careful not to damage the big bonnet and connecting rod fitting surface
■ Do not damage the cylinder wall and the crankshaft journal with the big end of the connecting
rod.
■ Maintain the connecting rod big end and the connecting rod body match sequentially and
maintain the connecting rod big end serial number in consistency
⑩
Dismount bearing shell from the connecting rod and the connecting rod cover.
Attention:
■ Identify their mounting positions, and properly place them to avoid confusion.
⑪
Dismount ring from the piston.
Check the side clearance of piston ring before dismounting. See "Check after Disassembly" below.
Attention:
■ Use the piston ring expander.
⑫
Dismount the piston ring from the connecting
rod with method below:
a. Insert the push rod (special tool) from the front
side with a arrow mark, and then install the
guide sleeve D.
b. With the front mark of piston face upwards,
install piston and connecting rod assembly on
the mounting base of piston pin (special tool).
c. Push out the piston ring by the press.
d. Detach the connecting rod from piston.
Attention:
■ After dismounting piston pin, place it
together with the piston pin and the
connecting rod.
■ It is forbidden to place the pistons, piston
pins and connecting rods of different
cylinders together.
⑬
Dismount the crankshaft bearing cap.
Before loosening the crankshaft bearing cap, measure axial clearance of crankshaft. See "Check after
Disassembly" below.
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Fig.1.1.052
Piston Ring
Expander
Fig.1.1.053
Front
Mark
Mechanical Part of
Engine
Push Rod
Front Mark
Guide Sleeve D
Base