The inspection steps of rocker arm and rocker arm shaft
are as follows:
1.Check whether the rocker arm arc surface is damaged,
whether the valve adjustment screw and nut rotate
flexibly, if wear and damage are serious, it is necessary
to replace the rocker arm;
2.Check
whether
rocker
arm shaft has wear
phenomenon, if the wear is serious, it is necessary to
replace a new rocker arm shaft;
Inspection of camshaft components
The camshaft convex has no obvious concave and
convex feeling when touched by hand
Inspection steps for camshaft components are as
follows:
1.Check whether the camshaft peach tip and base circle
have wear phenomenon, whether the camshaft bearing
rotation is flexible,If the phenomenon of wear or
bearing rotation is bad, it should be replaced with new
camshaft parts;
2.Check whether there is a crack in the pressure
reducing valve swinging block combination, the spring
does not rebound, and whether the centrifugal swinging
block of the pressure reducing valve and the core shaft
are loose. If so, it is necessary to replace the pressure
reducing valve swinging block combination
Inspection of cylinder head
Check the cylinder head as follows:
1.Check whether the sealing of the cylinder head is
good, if the sealing of the cylinder head is poor, it
should be replaced with a new cylinder head or valve;
2.Check spark plug hole and valve seat for cracks;
3.Check whether the cylinder head is deformed, and
check the flatness of the cylinder head with knife edge
ruler and feeler ruler;
4.Check whether the oil cap is damaged.
Check and grind valve seats
Check and grind the valve seat as follows:
The carbon deposit in the combustion chamber is
completely clean, evenly smear a thin layer of red oil on
the valve seat, put the valve on the valve seat gently tap
the valve not to rotate, and then pull out the valve, if the
contact trace on the valve working surface is
intermittent, the valve seat should be ground and
repaired.
When grinding, first remove the carbon deposit on the
inlet and exhaust valve seat, then apply the abrasive on
the valve seat, and then suck the valve with the grinding
tool of the rubber head, and grind the valve seat.
Inspection of valve guide
