Honda GX270H Manual page 160

62Z7B000.book 17 ページ ２０１２年９月２７日 木曜日 午前１０時２１分
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PISTON RING WIDTH
Measure each piston ring width.
STANDARD:
Top:
Second:
SERVICE LIMIT:
Top:
Second:
If any of the measurements is less than the service
limit, replace the piston rings (top, second, oil) as a set
(page 14-13).
PISTON RING END GAP
Before inspection, check whether the cylinder sleeve
I.D. is within the specification.
Measure each piston ring end gap using a feeler gauge.
STANDARD:
Top:
Second:
Oil (side rail)
SERVICE LIMIT:
Top:
Second:
Oil (side rail)
If any of the measurements is more than the service
limit, replace the piston rings (top, second, oil) as a set
(page 14-13).
CONNECTING ROD BIG END SIDE
CLEARANCE
Measure the clearance between the connecting rod big
end and crankshaft using a feeler gauge.
STANDARD:
SERVICE LIMIT:
If the measurement is more than the service limit,
replace the connecting rod (page 14-13) and recheck
the clearance.
If the clearance is still more than the service limit with
the new connecting rod, replace the crankshaft (page
14-6).
1.170 – 1.190 mm
(0.0460 – 0.0469 in)
1.155 – 1.175 mm
(0.0455 – 0.0463 in)
1.140 mm (0.0449 in)
1.140 mm (0.0449 in)
0.200 – 0.350 mm
(0.0079 – 0.0138 in)
0.350 – 0.550 mm
(0.0138 – 0.0217 in)
0.2 – 0.7 mm (0.01 – 0.03 in)
1.0 mm (0.04 in)
1.0 mm (0.04 in)
1.0 mm (0.04 in)
0.10 – 0.40 mm (0.004 – 0.016 in)
1.0 mm (0.04 in)
CRANKCASE
PISTON RING
14-17