Service Bulletin No. 642

Incorrect Piston and Ring Combination

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Service Bulletin No. 642
Incorrect Piston and Ring Combination

March 22, 2020


O-235-C, E & H series, and Factory Cylinder Kit P/N 05K23039


Within the next 10 hours of operation or next scheduled maintenance event, whichever occurs first.

Service Bulletin as a result of COS-3031 investigation from reports of incorrect piston and rings found in 05K23039 cylinder kits.

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