The Chelsea 863 Series Power Take-Off, part number 863XBAHP-Y5XV or 863XBAHPY5XV, is a forward-and-reverse driveline PTO built for maximum-duty mechanical winch and oil field applications. It mounts to transmissions with 8-bolt openings, including Eaton Fuller and Mack units. Output is through a 1410 Series companion flange. Intermittent torque rating reaches 500 lb-ft (678 Nm); continuous operation is supported with a 30% de-rating applied. Shift is by lever (mechanical). The cast iron housing and heavy-duty ball bearings on the output shaft contribute to the series' high torque capacity and extended service life. A genuine Chelsea part sold by Pro Gear and Transmission. Call us to confirm proper fit for your specific transmission application.

• Output Type: Driveline
• Output Shaft Type: 1410 Series Companion Flange
• Shift Type: Lever (Mechanical)
• Mounting Type: 8-Bolt, Reversible
• Intermittent Torque: 500 lb-ft / 678 Nm (check application pages for actual torque ratings)
• Continuous Operation: Yes, with 30% de-rating
• Transmission Compatibility: Eaton Fuller, Mack, Allison, Volvo/Mack, and other 8-bolt manual transmissions

The Chelsea 863 Series is purpose-built for heavy-duty mechanical winch work in oil field, logging, and mobile equipment applications. The 8-bolt mounting pattern provides broad coverage across major manual transmission brands. Parker documents available for this series include the 863 Series Parts List (HY25-2863-M1_US) and the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual. Call Pro Gear and Transmission to confirm this assembly matches your transmission and application before ordering.