Kubota WSM STa-30, Руководство по ремонту

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1-S41
ST
α
-30 · ST
α
-35, WSM ENGINE
Clearance between Piston Ring and Groove
1. Remove carbon from the ring grooves.
2. Measure the clearance between the ring and the groove with a
feeler gauge or depth gauge.
3. If the clearance exceeds allowable limit, replace the ring since
compression leak and oil shortage result.
4. if the clearance still exceeds the allowable limit after replacing the
ring, replace the piston.
W1032489
Connecting Rod Alignment
NOTE
■
• Since the I.D. of the connecting rod small end bushing is the
basis of this check, check bushing for wear beforehand.
1. Install the piston pin into the connecting rod.
2. Install the connecting rod on the connecting rod alignment tool.
3. Put a gauge over the piston pin and move it against the face
plate.
4. If the gauge does not fit squarely against the face plate, measure
the space between the pin of the gauge and the face plate.
5. If the measurement exceeds the allowable limit, replace the
connecting rod.
W1032720
Second
ring
D1463-M
Factory spec.
0.093 to 0.120 mm
0.00366 to 0.00472 in.
Allowable limit
0.2 mm
0.0079 in.
D1703-M
Factory spec.
0.093 to 0.128 mm
0.00366 to 0.00504 in.
Allowable limit
0.2 mm
0.0079 in.
Oil ring
Factory spec.
0.020 to 0.060 mm
0.00079 to 0.00205 in.
Allowable limit
0.15 mm
0.0059 in.
Connecting rod
alignment
Allowable limit
0.05 mm
0.0020 in.
KiSC issued 11, 2006 A