Arctic Cat 2015 ZR 5000 Service Manual page 89

Taper Limit (T)
Out of Round (R)
"C" = maximum of D1 - D6
"T" = maximum of D1 or D2 – maximum of D5 or D6
"R" = maximum of D1 D3 or D5 – maximum of D2, D4, or D6
 NOTE: If out of specification, replace the crankcase
and the piston and piston rings as a set.
Measuring Piston Pin Bore
Diameter
 NOTE: It may be necessary to use Piston Pin Puller
to remove the piston pins.
1. Insert an inside dial indicator into the piston-pin
bore. Take two measurements to ensure accuracy.
2. Piston pin bore must be within 0.7482-0.7486 in.
Measuring Piston Pin Diameter
Measure the piston pin diameter at each end and in the
center. Measurement must be within 0.7477-0.7480 in. If
measurement is not within specifications, the piston pin
must be replaced.
0.050 mm (0.0020 in.)
0.050 mm (0.0020 in.)
SNO-290
SNO-291
Installing Piston Rings
1. Install the piston rings according to the illustration
below. Stagger the end gaps of the upper and lower
thin oil rings until they are on directly opposite sides
of the piston.
 NOTE: Be sure to install the piston rings so that the
manufacturer marks (A) face up.
2. Rotate the rings until the ring end gaps are 120° from
one another.
CAUTION
Incorrect installation of the piston rings will result in
engine damage.
CRANKSHAFT RUNOUT
1. Support the crankshaft using a set of V Blocks; use a
dial indicator to read crankshaft runout.
SNO-292
SNO-293A
SNO-294A
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