Kubota GR1600EU Workshop Manual page 131

GR1600EU, WSM
Piston Ring Gap
1. Insert the piston ring into the lower part of the cylinder (the least
worn out part) with piston.
2. Measure the ring gap with a thickness gauge.
3. If the measurement exceeds the allowable limit, replace the
piston ring.
Top ring
Second
Piston ring gap
ring
Oil ring
Clearance between Piston Ring and Piston Ring Groove
1. Clean the rings and the ring grooves, and install each ring in its
groove.
2. Measure the clearance between the ring and the groove with a
thickness gauge.
3. If the clearance exceeds the allowable limit, replace the piston
ring.
4. If the clearance still exceeds the allowable limit with new ring,
replace the piston.
Second
ring
Clearance between
piston ring and piston
ring groove
Oil ring
Connecting Rod Alignment
1. Remove the crankpin bearing, and install the connecting rod
cap.
2. Install the piston pin in the connecting rod.
3. Install the connecting rod on the connecting rod alignment tool
(Code No. 07909-31661).
4. Put a gauge over the piston pin, and move it against the face
plate.
5. If the gauge does not fit squarely against the face plate,
measure the space between the pin of the gauge and the face
plate.
6. If the measurement exceeds the allowable limit, replace the
connecting rod.
Space between gauge
Allowable limit
pin face plate
1-S45
ENGINE
Factory
0.15 to 0.30 mm
specifica-
0.0059 to 0.011 in.
tion
Allowable 1.20 mm
limit 0.0472 in.
Factory
0.30 to 0.40 mm
specifica-
0.012 to 0.015 in.
tion
Allowable 1.20 mm
limit 0.0472 in.
Factory
0.15 to 0.30 mm
specifica-
0.0059 to 0.011 in.
tion
Allowable 1.20 mm
limit 0.0472 in.
9Y1210595ENS0077US0
Factory
0.0850 to 0.115 mm
specifica-
0.00335 to 0.00452 in.
tion
Allowable 0.15 mm
limit 0.0059 in.
Factory
0.02 to 0.06 mm
specifica-
0.0008 to 0.002 in.
tion
Allowable 0.15 mm
limit 0.0059 in.
9Y1210595ENS0078US0
0.05 mm
0.0020 in.
9Y1210595ENS0079US0
KiSC issued 11, 2013 A