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ENGINE / COOLING
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9924096 - 2013 RANGER RZR XP 900 / RZR XP 4 900 Service Manual
© Copyright 2012 Polaris Sales Inc.
3. Measure piston pin bore I.D. in two directions (90°
apart). Replace piston and piston pin if out of
specification.
4. Measure piston pin O.D. in two directions (90° apart)
at three locations on the length. Replace piston and
piston pin if out of specification.
Piston Ring Removal
1. Carefully remove top compression ring (B) by hand or
using a ring removal pliers.
• Piston ring pliers: Carefully expand ring and lift it
off the piston.
• By hand: Placing both thumbs on the ring ends,
spread the ring open and push up on opposite
side. Do not scratch ring lands.
2. Repeat procedure for second compression ring (C).
3. The oil control ring (D) is a three piece design
consisting of a top and bottom steel rail and a center
expander section. Remove top rail first, then bottom
rail, then the expander.
Piston Pin Bore I.D.:
0.7877" - 0.7881" (20.009 - 20.018 mm)
Service Limit: 0.7893" (20.05 mm)
Piston Pin O.D.:
0.7873" - 0.7875" (20.000 - 20.005 mm)
Service Limit: 0.7866" (19.98 mm)
Piston Pin Measurement Locations
DO NOT expand the ring more than necessary
to remove it from the piston or the ring may
break or lose radial tension.
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