Kubota GR1600EU Workshop Manual page 130

GR1600EU, WSM
Oil Clearance between Piton 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.
(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 positions as shown in the figure,
until it is flush with the connecting rod.
3. Drill a hole to the bushing with aligning the oil hole (2) of
connecting rod. (Refer to the figure.)
NOTE
• Be sure to chamfer the oil hole circumference with an oil
stone.
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-S44
ENGINE
0.014 to 0.038 mm
0.00056 to 0.0014 in.
0.10 mm
0.0039 in.
20.002 to 20.011 mm
0.78748 to 0.78783 in.
20.025 to 20.040 mm
0.78839 to 0.78897 in.
9Y1210595ENS0075US0
0.015 to 0.075 mm
0.00059 to 0.0029 in.
0.15 mm
0.0059 in.
20.026 to 20.077 mm
0.78843 to 0.79043 in.
(A) When removing
(B) When installing
(a) 0.79 rad (45 °)
9Y1210595ENS0076US0
KiSC issued 11, 2013 A