Kubota WSM J Series Workshop Manual page 146

J SERIES, WSM
Correcting Cylinder
1. When the cylinder is worn beyond the allowable limit, bore and
hone it to the specified dimension.
[Z482, D722]
Oversized cylinder liner I.D.
Finishing
[D1005, V1305]
Oversized cylinder liner I.D.
Finishing
2. Replace the piston and piston rings with oversize ones.
[Z482, D722]
Oversize Part Name
Piston
0.25 mm
0.0098 in.
Piston ring assembly
[D1005, V1305]
Oversize Part Name
Piston 05
0.5 mm
0.0197 in.
Piston ring 05 assembly
NOTE

• When the oversize cylinder is worn beyond the allowable
limit, replace the cylinder block with a new one.
(1) Cylinder I.D. (Before Correction)
S-100
67.250 to 67.269 mm
Factory spec.
2.64764 to 2.64839 in.
67.419 mm
Allowable limit
2.65429 in.
Hone to 1.2 to 2.0 mR max.
(0.000047 to 0.0079 in.R max.)
76.500 to 76.519 mm
Factory spec.
3.01181 to 3.01256 in.
76.669 mm
Allowable limit
3.0185 in.
Hone to 1.2 to 2.0 mR max.
(0.000047 to 0.0079 in.R max.)
Code Number
16851-21900
16851-21090
Code Number
16251-21910
16271-21090
(2) Oversized Cylinder I.D.
ENGINE
Marking
025 OS
025 OS
Marking
05 OS
05 OS
W10367470
KiSC issued 10, 2016 A