Kubota WG972-E2 Workshop Manual page 122

WG972-E2, DF972-E2, WSM
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 spec.
(Intake and exhaust)
■
IMPORTANT
• Do not hit the valve guide with a hammer during
replacement.
(A) When Removing
Valve Seating
1. Coat the valve face lightly with prussian blue and put the valve on
its seat to check the contact.
2. If the valve does not seat all the way around the valve seat or the
valve contact is less than 70 %, correct the valve seating as
follows.
3. If the valve contact does not comply with the reference value,
replace the valve or correct the contact of valve seating.
Valve seat width Factory spec.
(1) Correct
(2) Incorrect
S-52
GASOLINE / LPG ENGINE
6.010 to 6.025 mm
0.23661 to 0.23720 in.
(B) When Installing
W10314690
2.12 mm
0.0835 in.
(3) Incorrect
W10282190
KiSC issued 01, 2006 A