Snowmobile Polaris 550 IQ Shift / 550 IQ 136 / 550 IQ LXT (2013 year). Instruction - part 23
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MAINTENANCE
Steering System
Rail Slide Wear
For ease of inspection, all POLARIS rail slides have a wear limit indicator groove to indicate the minimum per- missible slide thickness. Replace the rail slides if they are worn to the top of the groove at any point along their length. Failure to do so may result in permanent damage to the track or rails.