Kubota WG1605-G-E3 Workshop Manual page 121

WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, WSM
Clearance between Valve Stem and Valve Guide
1. Remove carbon from the valve guide section.
2. Measure the valve stem O.D. with an outside micrometer.
3. Measure the valve guide I.D. with a small hole gauge, and
calculate the clearance.
4. If the clearance exceeds the allowable limit, replace the valves.
If it still exceeds the allowable limit, replace the valve guide.
Factory specification
Clearance between
valve stem and valve
guide
Allowable limit
Valve stem O.D. Factory specification
Valve guide I.D. Factory specification
Replacing Valve Guide
(When removing)
1. Press out the used valve guide using a valve guide replacing
tool.
(When installing)
1. Clean a new valve guide and valve guide bore, and apply
engine oil to them.
2. Press in a new valve guide using a valve guide replacing tool.
3. Ream precisely the I.D. of the valve guide to the specified
dimension.
Valve guide I.D.
Factory specification
(Intake and exhaust)
IMPORTANT
• Do not hit the valve guide with a hammer during
replacement.
(A) When Removing
1-S43
ENGINE
0.035 to 0.065 mm
0.0014 to 0.0025 in
0.10 mm
0.0039 in.
6.960 to 6.975 mm
0.2741 to 0.2746 in
7.010 to 7.025 mm
0.2760 to 0.2765 in
9Y1210661ENS0039US0
7.010 to 7.025 mm
0.2760 to 0.2765 in
(B) When Installing
9Y1210661ENS0040US0
KiSC issued 01, 2012 A