The Chelsea 863 Series Power Take-Off Assembly, part number 863XBDAX-Y4XV or 863XBDAXY4XV, is a forward-and-reverse driveline PTO built for maximum-duty mechanical applications. It mounts to transmissions with 8-bolt openings, covering manual units from manufacturers including Eaton Fuller, Mack, Allison, and Volvo. The output is a 1410 Series companion flange, and the unit shifts via lever (mechanical). Intermittent torque capacity reaches 500 lb-ft (678 Nm); continuous operation is rated at 30% de-rating from peak. The cast iron housing and heavy-duty ball bearings on the output shaft are characteristic of the 863 Series, which is built for oil field and logging applications where winch duty cycles are demanding. Call us to confirm fitment for your specific transmission.

• 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
• Transmission Compatibility: Eaton Fuller, Mack/Volvo, Allison, and other 8-bolt manual transmissions

The Chelsea 863 Series is engineered for heavy-duty mechanical winch applications in oil field and logging environments. The series is documented in the Parker Chelsea 863 Series Parts List (HY25-2863-M1_US) and the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual, both available through Parker Chelsea. The standard 1-1/2-inch, 10-tooth output shaft mates to the 1410 companion flange included with this assembly. For specific torque and application ratings for your transmission model, consult the Chelsea application pages or give Pro Gear and Transmission a call.