2
-
75
42hw-201601
Chapter 2 enGIne
3015r(h)/3515r(h)/4015r(h)/F36r(h)/F42r(h) traCtOr
2
SpeCIFICatIOn
LImIt
7.96 ~ 7.97 mm
7.9 mm
Measure the valve stem outer diameter.
.
If the wear is over the limit, replace the valve.
•
K20W255A
Check the valve sheet contact surface and if
necessary, modify it with grinding paper. And if it
got damaged a lot, replace it if it got damaged a lot.
Check the margin(thickness of valve head) and if
less than the limit, replace it.
•
•
SpeCIFICatIOn
1.2 mm
LImIt
0.5 mm
0DUJLQ
&RQWDFWVXUIDFH
K25W285A
Intake & exhauSt vaLve & vaLve GuIde
vaLve
▶
vaLve Sheet COntaCt SurFaCe
▶
vaLve GuIde
▶
Measure the distance between the valve guide
and valve stem.
If the distance is more than limit, replace the
valve or valve guide or either parts.
•
SpeCIFICatIOn
0.04 ~ 0.05 mm
LImIt
0.2 mm
K20W257A
Valve guide and the valve sheet should be
machined at the same time. (Valve guide must
assemble by the press machine.)
Valve guide Inner diameter: 8.010 ~ 8.025 mm
Valve guide’s projecting quantity from the head
surface : 13 mm
•
•
•
Содержание 3015h
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