Toro 500 EFI Service Manual page 48

2. Remove each ring by working it toward the top of
the piston while rotating it out of the groove.

NOTE: When installing new rings, install as a com-
plete set only.
Measuring Piston-Ring End Gap
(Installed)
1. Place each piston ring in the wear portion of the cyl-
inder. Use the piston to position each ring squarely in
the cylinder.
2. Using a feeler gauge, measure each piston-ring end
gap. Acceptable ring end gap must not exceed speci-
fications.
Measuring Piston Pin, Connecting
Rod Small End, and Piston-Pin Bore
1. Measure the piston pin outside diameter at each end
and in the center. If measurement does not meet
specifications, the piston pin must be replaced.
46
CC400D
2. Inspect and measure the connecting rod small end
inside diameter. If the measurement exceeds specifi-
cations, the connecting rod must be replaced (see
Center Crankcase Components in this section).
3. Insert an inside dial indicator into the piston-pin
bore. Take two measurements to ensure accuracy.
The diameter must not exceed specifications. If the
diameter exceeds specifications, the piston must be
replaced.
Measuring Piston Skirt/
Cylinder Clearance
1. Measure the cylinder front to back in six places.
CC995
2. Measure the corresponding piston diameter at a point
8 mm (0.3 in.) above the piston skirt at a right angle
to the piston-pin bore. Subtract this measurement
from the measurement in step 1. The difference
(clearance) must be within specifications.
ATV-1070
ATV-1069
CC127D