2
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75
42hW-201601
CHAPTER 2 ENGINE3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
2
SPECIFICATION LIMIT
7.96 ~ 7.97 mm 7.9 mm
Mea su re t he va lve s te m ou te r d ia m eter.
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
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
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