The Chelsea Piston Shifter, part number 66P13 or 66-P-13, is a genuine Chelsea replacement component listed for the 721 Series PTO. In the manufacturer's illustrated parts list for the 721 Series, this piston carries item reference 54 with a quantity of one per assembly, making it a direct OEM-spec service part. Chelsea PTOs are common across a broad range of commercial truck and fleet applications, and using the correct OEM-spec piston keeps the shift mechanism operating as designed. Call Pro Gear and Transmission to confirm this is the right part for your specific PTO configuration.
Used in these Chelsea PTO models
Features
Genuine Chelsea part number 66P13 or 66-P-13
Listed as item 54 in the Chelsea 721 Series PTO illustrated parts list
Quantity of one per assembly per the OEM parts manual
Direct-fit service replacement for the 721 Series shift mechanism
Sold by Pro Gear and Transmission
