Weichai America Corp.
52
3
Valve seal
6
Cylinder
head
9
Upper valve
seat
4.5.2
Steps to disassemble valves
1)
Depress valve springs with vale spring compressor or valve overhead plier or other tools, take
out valve lock clamp, upper valve spring seat and lower valve spring seat and valve springs
orderly;
2)
Take valve out of valve seat.
4.5.3
Steps to assemble valves
1)
A valve with severe wear or carbon deposit or sintering should be replaced.
2)
Apply molybdenum disulfide cream on intake and exhaust valve rod, and then install intake and
exhaust valve into cylinder cover, ensure the valve can slide smoothly in valve guide pipe;
NOTICE: Check and ensure spring in valve rod seal cartridge is in good condition before
assembling.
3)
Install valve inner and outer spring;
4)
Assemble upper valve spring seat, depress the springs and install valve lock clamp;
5)
Knock the valve with rubber hammer to settle the lock clamp, if the valve lock clamp or upper
valve spring seat cannot be settled, please find out the cause and eliminate it.
4.5.4
Inspection and maintenance of valves
1)
Check whether valve rod and its end faces are worn;
2)
Check whether valve conical surface is worn or damaged;
3)
Check valve conical surface and retainer end faces for carbon deposit;
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