Kubota GR1600EC2, Workshop Manual, Page: 109 / 241

1-S42
GR1600EC2, WSM ENGINE
Oil Clearance between Idle Gear Shaft and Idle Gear Bushing
1. Measure the idle gear shaft O.D. with an outside micrometer.
2. Measure the idle gear bushing I.D. with an inside micrometer,
and calculate the oil clearance.
3. If the oil clearance exceeds the allowable limit, replace the
bushing.
4. If it still exceeds the allowable limit, replace the idle gear shaft.
W11356150
Replacing Idle Gear Bushing
(When removing)
1. Press out the used idle gear bushing using an idle gear bushing
replacing tool.
(When installing)
1. Clean a new idle gear bushing and idle gear bore, and apply
engine oil to them.
2. Press in a new brushing using an idle gear bushing replacing
tool, until it is flush with the end of the idle gear.
W11373220
(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.
W11406200
Oil clearance between
idle gear shaft and idle
gear bushing
Factory spec.
0.020 to 0.084 mm
0.00079 to 0.00331 in.
Allowable limit
0.10 mm
0.0039 in.
Idle gear shaft O.D. Factory spec.
19.967 to 19.980 mm
0.78610 to 0.78661 in.
Idle gear bushing I.D. Factory spec.
20.000 to 20.051 mm
0.78740 to 0.78941 in.
(A) When removing (B) When installing
Piston pin bore I.D.
Factory spec.
20.000 to 20.013 mm
0.78740 to 0.78791 in.
Allowable limit
20.05 mm
0.7894 in.
KiSC issued 07, 2006 A