Piston And Connecting Rod - Kubota EA330-E4 Series Workshop Manual

EA330-E4, WSM

(2) Piston and Connecting Rod

Piston Skirt O.D.
1. Measure the piston skirt O.D. with an outside micrometer.
(Measuring points are shown in the figure.)
2. If the measurement is less than the allowable limit, replace the
piston.
Factory specification
Piston skirt O.D.
Allowable limit
Piston Pin Bore
1. Measure the piston pin bore I.D. (lengthwise and widthwise of
the piston) with a cylinder gauge.
2. If the measurement exceeds the allowable limit, replace the
piston.
Factory specification
Piston pin bore I.D.
Allowable limit
Oil Clearance between Piston Pin and Bushing
1. Measure the piston pin O.D. with an outside micrometer.
2. Measure the piston pin bushing I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the clearance exceeds the allowable limit, replace the
bushing.
4. If the clearance still exceeds the allowable limit with new
bushing, replace the piston pin.
Factory specification
Oil clearance between
piston pin and bushing
Allowable limit
Piston pin O.D. Factory specification
Small end bushing I.D. Factory specification
1-S50
ENGINE
76.925 to 76.945 mm
3.0286 to 3.0293 in.
Cylinder liner I.D.
−0.25 mm
−0.0098 in.
9Y1211018ENS0084US0
20.000 to 20.013 mm
0.78741 to 0.78791 in.
20.04 mm
0.7890 in.
9Y1211018ENS0085US0
0.014 to 0.038 mm
0.00056 to 0.0014 in.
0.15 mm
0.0059 in.
20.002 to 20.011 mm
0.78748 to 0.78783 in.
20.025 to 20.040 mm
0.78839 to 0.78897 in.
9Y1211018ENS0086US0
KiSC issued 05, 2015 A