Weichai America Corp.
53
4.6
Rocker arm and shaft assembly and disassembly
4.6.1
Exploded view of rocker arm and shaft
Pos.
Name
Pos.
Name
Pos.
Name
1
Bolt
4
Adjust bolt
7
Washer
2
Nut
5
Cylinder head
8
Rocker arm seat
3
Rocker arm
6
clip
4.6.2
Steps to disassemble rocker arm and shaft
1)
Rotate the crankshaft to ensure that the rocker moves smoothly.
2)
Measure each valve clearance, and check any changes in valve clearance.
3)
If the rocker is not flexible or the valve clearance is too big, loosen the hex screw and then remove
the rocker seat, shaft circlip, butterfly spring washer, rocker and the other butterfly spring washer.
Mark the items to prevent improper assembly.
4.6.3
Steps to assemble rocker arm and shaft
1)
Check whether all to-be assembled pars are clean, free of bump damage, scratch and rust;
2)
Install rocker adjusting screw and lock nut, the screw should be fully screwed in, while the lock
nut only needs to be screwed in for 2~3 thread pitches;
3)
Apply lubricating oil on rocker seat and rocker inner hole, and install butterfly spring washer,
rocker assembly, the other butterfly spring washer and circlip for shaft on rocker seat;
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