Weichai America Corp.
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3.2.3 Disassembly steps of piston & connecting rod assembly
1.
Inspections before disassembling. Check the axial clearance of connecting rod and the
tightening torque of connecting rod bolts.
2.
Place the engine obliquely and laterally, crank the engine to position bring the piston to be
removed to BDC, and remove the connecting rod bolt and big end cap;
3.
Crank to TDC, knock out the piston with a wood hammer carefully, protecting the big end
from being blocked by cylinder block.
4.
Remove the remaining pistons following the same method, and place them in order.
5.
Use a circlip pliers to remove the circlip on both sides of piston carefully, push out the piston
pin and remove the connecting rod body. Number the piston pins and connecting rods
respectively, and place them in order.
6.
Use a piston ring pliers to remove the 1st ring, 2nd ring and the oil ring, and mark them
respectively.
7.
Remove connecting rod lower shell and upper shell, mark and place them in order.
3.2.4 Assembly steps of piston & connecting rod group
The connecting rod and the piston are in the same quality group, the connecting rod and
connecting cover must be matched.
1.
Use a circlip pliers to install one circlip for hole into the piston circlip groove, and turn the
circlip for a secure installation, always with the angular face inwards, and the opening of
piston ring circlip upwards.
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