Kubota B1830 Workshop Manual page 160

B1830,B2230,B2530,B3030, WSM
Oil Clearance between Piston Pin and Small End Bushing
1. Measure the piston pin O.D. where it contacts the bushing with
an outside micrometer.
2. Measure the small end bushing I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
bushing. If it still exceeds the allowable limit, replace the piston
pin.
Factory specification
Oil clearance between
piston pin and small end
bushing
Allowable limit
Piston pin O.D. Factory specification
Small end bushing I.D. Factory specification
Replacing Small End Bushing
(When removing)
1. Press out the used bushing using a small end bushing replacing
tool. (See page "SPECIAL TOOLS".)
(When installing)
1. Clean a new small end bushing and bore, and apply engine oil
to them.
2. Using a small end bushing replacing tool, press in a new
bushing (service parts) taking care to see that the connecting
rod oil hole matches the bushing hole.
Factory specification
Oil clearance between
piston pin and small end
bushing (Spare parts)
Allowable limit
Small end bushing I.D.
Factory specification
(Spare parts)
(1) Seam
(2) Oil Hole
1-S59
ENGINE
0.014 to 0.038 mm
0.00055 to 0.00150 in.
0.15 mm
0.0059 in.
22.002 to 22.011 mm
0.8662 to 0.8666 in.
22.025 to 22.040 mm
0.8671 to 0.8677 in.
9Y1210003ENS0097US0
0.015 to 0.075 mm
0.00059 to 0.00295 in.
0.15 mm
0.0059 in.
22.026 to 22.077 mm
0.7885 to 0.7904 in.
(A) When Removing
(B) When Installing
(a) 0.785 rad (45 °)
9Y1210003ENS0098US0
KiSC issued 05, 2012 A