Kubota WSM J Series Workshop Manual page 135

J SERIES, WSM
Piston Ring Gap
1. Insert the piston ring into the lower part of the cylinder (the least
worn out part) with a piston ring compressor and piston.
2. Measure the ring gap with a feeler gauge.
3. If the measurement exceeds the allowable limit, replace the
piston ring.
[Z482, D722]
Top ring
Second ring
Piston ring gap
Oil ring
[D1005, V1305]
Top ring
Second ring
Piston ring gap
Oil ring
Clearance between Piston Ring and Piston Ring Groove
1. Clean the rings and the ring grooves, and install each ring in its
groove.
2. Measure the clearance between the ring and the groove with a
feeler gauge.
3. If the clearance exceeds the allowable limit, replace the piston
ring.
4. If the clearance still exceeds the allowable limit with new ring,
replace the piston.
[Z482, D722]
Second ring
Clearance between
piston ring and
piston ring groove
Oil ring
[D1005, V1305]
Second ring
Clearance between
piston ring and
piston ring groove
Oil ring
S-89
ENGINE
Factory 0.15 to 0.30 mm
spec. 0.0059 to 0.0118 in.
Allowable 1.25 mm
limit 0.0492 in.
Factory 0.15 to 0.30 mm
spec. 0.0059 to 0.0118 in.
Allowable 1.25 mm
limit 0.0492 in.
Factory 0.25 to 0.40 mm
spec. 0.0098 to 0.0157 in.
Allowable 1.25 mm
limit 0.0492 in.
Factory 0.25 to 0.45 mm
spec. 0.0098 to 0.0177 in.
Allowable 1.25 mm
limit 0.0492 in.
W11466710
Factory 0.090 to 0.120 mm
spec. 0.00354 to 0.00472 in.
Allowable 0.15 mm
limit 0.0059 in.
Factory 0.04 to 0.08 mm
spec. 0.0016 to 0.0031 in.
Allowable 0.15 mm
limit 0.0059 in.
Factory 0.085 to 0.112 mm
spec. 0.00335 to 0.00441 in.
Allowable 0.20 mm
limit 0.0079 in.
Factory 0.020 to 0.055 mm
spec. 0.00079 to 0.00217 in.
Allowable 0.15 mm
limit 0.0059 in.
W11485500
KiSC issued 10, 2016 A