Kubota EA330-E4 Series Workshop Manual page 113

EA330-E4, WSM
Valve Spring Tilt
1. Place the spring on the surface plate and a square at its side.
2. Measure the free length "A" (See figure) by rotating spring.
3. If the measurement exceeds the allowable limit, replace the
valve spring.
Tilt B Allowable limit
A: Free Length
Oil Clearance between Rocker Arm Shaft and Rocker Arm
1. Measure the rocker arm shaft O.D. with an outside micrometer.
2. Measure the rocker arm I.D. with an inside micrometer, and
calculate the oil clearance.
3. If the clearance exceeds the allowable limit, replace the rocker
arm.
Factory specification
Oil clearance between
rocker arm and shaft
Allowable limit
Rocker arm shaft Factory specification
Rocker arm I.D. Allowable limit
Oil Clearance between Tappet and Guide
1. Measure the tappet O.D. with a outside micrometer.
2. Measure the tappet guide bore I.D. of the cylinder block with an
inside micrometer, and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit or the sliding
surface is scored, replace the tappet.
Factory specification
Oil clearance between
tappet and guide
Allowable limit
Tappet O.D. Factory specification
Guide bore I.D. Factory specification
1-S48
ENGINE
1.2 mm
0.047 in.
B: Tilt
9Y1211018ENS0080US0
0.016 to 0.045 mm
0.00063 to 0.0017 in.
0.15 mm
0.0059 in.
10.973 to 10.984 mm
0.43201 to 0.43244 in.
11.000 to 11.018 mm
0.43307 to 0.43377 in.
9Y1211018ENS0081US0
0.020 to 0.062 mm
0.00079 to 0.0024 in.
0.15 mm
0.0059 in.
19.959 to 19.980 mm
0.78579 to 0.78661 in.
20.000 to 20.021 mm
0.78741 to 0.78822 in.
9Y1211018ENS0082US0
KiSC issued 05, 2015 A