Piston And Connecting Rod - Kubota WSM 05-E3B Series Workshop Manual

05-E3B, 05-E3BG, WSM

(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.
Factory spec.
Piston pin bore I.D.
Allowable limit
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 spec.
Oil clearance between
piston pin and small end
bushing
Allowable limit
Piston pin O.D. Factory spec.
Small end bushing I.D. Factory spec.
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 due care to see that the connecting rod oil
hole matches the bushing hole.
Factory spec.
Oil clearance between
piston pin and small end
bushing (Spare parts)
Allowable limit
Small end bushing I.D.
Factory spec.
(Spare parts)
(1) Seam
(2) Oil Hole
S-59
DIESEL ENGINE
22.000 to 22.013 mm
0.86615 to 0.86665 in.
22.03 mm
0.8673 in.
W10304770
0.014 to 0.038 mm
0.00055 to 0.0014 in.
0.15 mm
0.0059 in.
22.002 to 22.011 mm
0.86622 to 0.86657 in.
22.025 to 22.040 mm
0.86713 to 0.86771 in.
W10305740
0.015 to 0.038 mm
0.00056 to 0.0014 in.
0.15 mm
0.0059 in.
22.025 to 22.040 mm
0.86713 to 0.86771 in.
(A) When Removing
(B) When Installing
(a) 0.79 rad (45 °)
W10307120
KiSC issued 12, 2007 A