Kubota SM-E3B Series - Servicing; Replacing Valve Guide; Valve Seating

S-55
SM-E3B SERIES WSM
DIESEL ENGINE
Replacing Valve Guide
(When removing)
1. Press out the used valve guide using a valve guide replacing tool.
(Refer to “SPECIAL TOOLS”.)
(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.
IMPORTANTQ
• Do not hit the valve guide with a hammer during
replacement.
W10314690
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.
W10282190
Valve guide I.D.
(Intake and exhaust)
Factory spec.
6.010 to 6.025 mm
0.2367 to 0.2372 in.
(A) When Removing (B) When Installing
Valve seat width Factory spec.
2.12 mm
0.0835 in.
(1) Correct
(2) Incorrect
(3) Incorrect
KiSC issued 03, 2011 A