ENGINE 3-37
Oversize piston ring
The following oversize piston rings are used. They bear the fol-
lowing identification numbers.
Oversize oil ring
The following oversize oil ring is available as optional parts.
They bear the following identification mark.
Oversize side rail
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 out-
side diameter. If the reading exceeds following limit, replace
both piston and piston pin.
Piston pin bore I.D.
Service Limit: 16.030 mm (0.6311 in)
09900-20602: Dial gauge (1/1000 mm, 1 mm)
09900-22401: Small bore gauge (10 – 18 mm)
Using a micrometer, measure the piston pin outside diameter at
three positions.
Piston pin O.D.
Service Limit: 15.980 mm (0.6291 in)
09900-20205: Micrometer (0 – 25 mm)
SIZE
1st 2nd
0.5 mm O.S. 50 50
SIZE COLOR
STD NIL
0.5 mm O.S. Painted Red
0.5 mm O.S.
Oil ring spacer
Paint
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