Kubota EA330-E4 Series - Page 112

ENGINE
EA330-E4, WSM
1-S47
Replacing Valve Guide
(When removing)
1. Press out valve guide with a valve guide replacing tool.
(When installing)
1. Clean the valve guide bore, and apply engine oil to it.
2. Press in the valve guide until its flange contacts the cylinder
head.
3. Provide an oil return hole in the exhaust valve with a drill.
4. Ream precisely the bore of the valve guide to the specified
dimension in the table below.
IMPORTANT
• Do not hit the valve guide with a hammer during
replacement.
9Y1211018ENS0078US0
Valve Spring Free Length and Tension
1. Measure the free length of the spring with vernier calipers.
2. Place the spring on a spring compression tester and compress
to the specified length, and get the tension.
3. If the measurement is less than the allowable limit, replace the
valve spring.
9Y1211018ENS0079US0
Valve guide bore I.D. Factory specification
7.010 to 7.025 mm
0.2760 to 0.2765 in.
Finishing 6.3 S
Free length
Factory specification
34.5 mm
1.36 in.
Allowable limit
33.8 mm
1.33 in.
Setting load / Setting
length
Factory specification
59 N / 31 mm
6.0 kgf / 31 mm
13 lbf / 1.2 in.
Allowable limit
49 N / 31 mm
5.0 kgf / 31 mm
11 lbf / 1.2 in.
KiSC issued 05, 2015 A