Kubota RTV1140CPX, Workshop Manual

Page: 130 / 379

ENGINE
RTV1140CPX, WSM
1-S47
(3) Piston and Connecting Rod
Piston Pin Bore I.D.
1. Measure the piston pin bore I.D. in both the horizontal and
vertical directions with a cylinder gauge.
2. If the measurement exceeds the allowable limit, replace the
piston.
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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.
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Replacing Small End Bushing
(When removing)
1. Press out the used bushing using a small end bushing replacing
tool. (Refer to "8. SPECIAL TOOLS" in "G. GENERAL" section.)
(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.
9Y1210293ENS0087US0
Piston pin bore I.D.
Factory specification
22.000 to 22.013 mm
0.86615 to 0.86665 in.
Allowable limit
22.03 mm
0.8673 in.
Oil clearance between
piston pin and small end
bushing
Factory specification
0.014 to 0.038 mm
0.00055 to 0.0014 in.
Allowable limit
0.15 mm
0.0059 in.
Piston pin O.D. Factory specification
22.002 to 22.011 mm
0.86622 to 0.86657 in.
Small end bushing I.D. Factory specification
22.025 to 22.040 mm
0.86713 to 0.86771 in.
Oil clearance between
piston pin and small end
bushing (Spare parts)
Factory specification
0.015 to 0.038 mm
0.00059 to 0.0014 in.
Allowable limit
0.15 mm
0.0059 in.
Small end bushing I.D.
(Spare parts)
Factory specification
22.025 to 22.040 mm
0.86713 to 0.86771 in.
(1) Seam
(2) Oil Hole (A) When Removing
(B) When Installing
(a) 0.79 rad (45 °)
KiSC issued 05, 2014 A