Fitting Pistons
- Measure piston skirt diameter at 90-degree angle to piston pin. If piston diameter is not within specification, replace piston. See PISTON/PIN/RING SPECIFICATIONS table at the end of this article.
- Measure cylinder bore diameter at the following 3 places: .47" (12 mm) from top of bore, .47" (12 mm) from bottom of bore, and near center of bore. If cylinder bore diameter or taper is not within specification, machine cylinder bore.
- If piston-to-cylinder bore clearance is not within specification, replace piston and/or machine cylinder bore.