0 Oversize piston ring
The following two types of oversize piston rings are used.
They bear the following identification numbers.
SIZE
1st
2nd
0.5 mm OS.
50
50
1 .O mm OS.
100
100
0 Oversize oil ring
The following two types of oversize oil rings are available as
optional parts. They bear the following identification marks.
SIZE
STD
0.5 mm O.S.
1 .O mm O.S.
COLOR
NIL
Painted Red
Painted Yellow
l
Oversize side rail
Piint
Just measure outside diameter to identify the side rail as
there is no mark or numbers on it.
PISTON PIN AND PIN BORE
Using a small bore gauge, measure the piston pin bore inside
diameter, and using a micrometer, measure the piston pin
outside diameter. If the reading exceeds the following limit,
replace both piston and piston pin.
Piston pin bore I.D.
Service Limit
:
20.030 mm (0.7886 in)
09900-20602
:
Dial gauge (l/1000 mm, 1 mm)
0990022403
:
Small bore gauge
(18
- 35 mm)
Using a micrometer, measure the piston pin outside diameter
at three positions.
Piston pin O.D.
Service Limit : 19.980 mm (0.7866 in)
09900-20205 : Micrometer (0 - 25 mm)
0.5 mm O.S.
1 .O mm O.S.
Oil ring
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