3
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
3.9
PISTON / RINGS / CONN ROD / CRANK / BALANCE SHAFT
INCHES (MM)
Piston
Piston - Standard O.D.
3.8957 - 3.8968″ (98.953 - 98.980 mm)
Piston Pin Bore I.D. (Standard) 0.8662 - 0.8665″ (22.004 - 22.010 mm)
Piston Pin Bore I.D. (Service Limit) 0.8677" (22.042 mm)
Piston Pin
Piston Pin O.D. (Standard) 0.8659" - 0.8661" (21.995 - 22.000 mm)
Piston Pin O.D. (Service Limit) 0.8651" (21.975 mm)
Piston Ring
Installed Gap
Top Ring (Standard) 0.0059" - 0.0122" (0.15 - 0.31 mm)
Top Ring (Service Limit) 0.0137" (0.35 mm)
Second Ring (Standard) 0.0094" - 0.0196" (0.24 - 0.50 mm)
Second Ring (Service Limit) 0.0220" (0.56 mm)
Oil Control Rails (Standard) 0.0098" - 0.0401" (0.25 - 1.02 mm)
Oil Control Rails (Service Limit) 0.0480" (1.22 mm)
Ring to Groove
Clearance
Top Ring (Standard) 0.0011" - 0.0037" (0.030 - 0.095 mm)
Top Ring (Service Limit) 0.0042" (0.108 mm)
Second Ring (Standard) 0.0007" - 0.0029" (0.020 - 0.076 mm)
Second Ring (Service Limit) 0.0035" (0.089 mm)
Connecting Rod
Connecting Rod Small End I.D. (Standard) 0.8665" - 0.8670" (22.010 - 22.023 mm)
Connecting Rod Small End I.D. (Service Limit) 0.8682" (22.053 mm)
Connecting Rod Big End I.D. See Service Procedure Listed In This Chapter
Crankshaft
Main Journal O.D. (Service Limit) 1.6137" (40.990 mm)
Crankshaft Runout Limit (PTO and MAG) See Service Procedure Listed In This Chapter
Balance Shaft
Bearing Journal O.D. (Standard) 1.1798 - 1.1802″ (29.969 - 29.979 mm)
ENGINE / COOLING SYSTEM
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