The Chelsea 863 Series Power Take-Off Assembly, part number 863XBAKP-Y5XV or 863XBAKPY5XV, is a forward and reverse PTO built for maximum-duty applications on transmissions with 8-bolt openings, including Mack and Eaton Fuller units. Shift type is lever mechanical. Output is a 1410 Series companion flange. Intermittent torque rating for this series reaches 500 lb-ft (678 Nm); continuous operation is supported with a 30% de-rating applied. Cast iron housing and heavy-duty ball bearings on the output shaft are characteristic of this series. Typical applications include oil field winch service and logging equipment. Call us to confirm proper fit for your specific transmission and application.

• Output Type: Driveline
• Shift Type: Lever, Mechanical
• Mounting Type: 8-Bolt, Reversible
• Output Shaft Type: 1410 Series Companion Flange
• Intermittent Torque: 500 lb-ft (678 Nm) - Check Application Pages for Actual Torque Ratings
• Continuous Operation: Yes, with 30% de-rating

The Chelsea 863 Series is designed for oil field and logging applications where a high-torque, reversible driveline PTO is required. The series fits most manual transmissions with an 8-bolt aperture, covering a wide range of Mack, Eaton Fuller, Volvo/Mack, and Allison-type installations. The standard output interface is the 1410 companion flange. For a complete application fit guide, refer to the Chelsea 863 Series Parts List (HY25-2863-M1_US) or the Chelsea Power Take-Off General Information Catalog, available through Parker Chelsea documentation.