Kubota EA330-E4 Series Workshop Manual page 112

EA330-E4, WSM
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.
Valve guide bore I.D. Factory specification
Finishing 6.3 S
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.
Factory specification
Free length
Allowable limit
Factory specification
Setting load / Setting
length
Allowable limit
1-S47
ENGINE
7.010 to 7.025 mm
0.2760 to 0.2765 in.
9Y1211018ENS0078US0
34.5 mm
1.36 in.
33.8 mm
1.33 in.
59 N / 31 mm
6.0 kgf / 31 mm
13 lbf / 1.2 in.
49 N / 31 mm
5.0 kgf / 31 mm
11 lbf / 1.2 in.
9Y1211018ENS0079US0
KiSC issued 05, 2015 A