Oil Clearance Between Piston Pin And Small End Bushing; Replacing Small End Bushing - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service

Oil Clearance between Piston Pin and Small End Bushing

1. Measure the O.D. of the piston pin where it contacts the bushing
with an outside micrometer.
2. Measure the I.D. of the piston pin bushing at the connecting rod
small end with a cylinder gauge.
Calculate the oil clearance.
3. If the 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.
(When installing)
1. Clean a new small end bushing and bore, and apply engine oil
to them.
2. Insert a new bushing onto the tool and press-fit it with a press so
that the seam (1) of bushing position as shown in the figure, until
is flash with the connecting rod.
(1) Seam
III-S-156
0.020 to 0.040 mm
0.0008 to 0.0016 in.
0.15 mm
0.0059 in.
30.006 to 30.011 mm
1.1813 to 1.1815 in.
30.031 to 30.046 mm
1.1823 to 1.1829 in.
W1065897
(A) When Removing
(B) When Installing
(C) 0.26 rad (15 °)
W1066057
Engine