Service Manual

Weichai America Corp.
Revision: August 2019 45
Fig. 9- 9 Exploded view of valve
9.6.2 Steps to disassemble valve
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.
9.6.3 Steps to assemble valve
A valve with severe wear or carbon deposit or sintering should be replaced.
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.
② Install valve inner and outer spring;
③ Assemble upper valve spring seat, depress the springs and install valve lock clamp;
④ 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.
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