Altra Industrial Motion Altra Industrial Motion Dynatork Service Kits The Dynatork Air motor piston is designed for easy maintenance. The life of the motor can be extended almost indefinitely by changing the pistons and seals at regular service intervals. The service kit contains a set of pistons and liners. Fitting procedure • Remove back flange. • Remove all three piston caps. • Push out Pistons and liners and ensure old O ring is removed. • Check for any debris before fitting new pistons. • Fit new Liners, Pistons and O rings assembly, ensuring piston slides when fitted. • Refit Piston Caps. • Refit Flange plate. • Test run motor. Order Codes Note: Due to design change size 7 Dynatork Pistons are now longer, if you have an older unit the new pistons can be fitted except on 900.70.B and 900.75.B types where the older shorter pistons are still available [order codes 909.70 & 909.75].