Joyner JNSZ1600QL, Owner'S Manual

Page: 58 / 215

57
——Check camshaft end play
，
end play should be as specified.
——When the hydraulic lifting rod of oversize 0.25 is applied, camshaft
must be selected, or the hydraulic lifting rod may be stuck.
Fig.63 Fig.64
Fig.65 Fig.66
6.
Valve, valve spring, valve oil seal, spring seat assembly removal and
installation
： ： ： ：
Removal
：
Using special tools for valve compression, take out valve locking pieces, don't compress
spring excessively, compress spring enough to slip locking pieces out of its stroke, or valve stem may
be bent. If valve locking pieces do not come out during spring compression, remove compression tools,
put an appropriate pipe on spring seat
，
so the valve locking piece will not be impacted. Put a wooden
block on valve head (with cylinder head combustion chamber facing workbench), and then strike pipe
end with hammer. Reinstall special tools for valve spring compression, locking pieces may be taken out.
After locking piece is taken out, remove compression tools by unbolting slowly.
——Remove valve spring seat and valve spring
，
take out valve oil seal spring seat assembly with
screwdriver
，
and valve oil seal spring seat must be replaced.
——Overturn cylinder head
，
remove intake and exhaust valves.
——Keep each set of valve, valve locking pieces, valve spring, spring seat in the same plastic bag and
mark numbers on it, so the parts may be installed in the original place.
——Valve standard sizes and clearance
：
Unit
：
mm