The Chelsea 863GBAHX-Y5XV or 863GBAHXY5XV is a heavy-duty Power Take-Off Assembly from the Chelsea 863 Series, built around an 8-bolt mounting configuration that covers a wide range of manual transmissions including Mack and Eaton Fuller applications. Output is driveline style through a 1410 Series companion flange. The unit is lever-shifted and engineered specifically for maximum-duty reversible operation, making it well-suited to heavy mechanical winch work in oil field and logging environments. Intermittent torque rating reaches 500 lb-ft (678 Nm); continuous operation is supported with a 30% de-rating applied. The cast iron housing and heavy-duty ball bearings on the output shaft contribute to the series' reputation for long service life in demanding cycles. Call us to confirm proper fit for your 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
• Output Power: 56+ HP / 51+ kW (series rating)
• Shaft Power: 48 HP at 500 RPM / 95 HP at 1000 RPM (series rating)
• Compatible Transmission Makes: Allison, Eaton Fuller, Volvo/Mack

The Chelsea 863 Series is designed for forward and reverse PTO duty in heavy-demand markets including oil and gas, mobile equipment, and forestry. The standard output is a 1-1/2" 10-tooth shaft paired with the 1410 companion flange. For application-specific torque ratings, consult the Chelsea 863 Series Application Pages. Parker Chelsea documents available for this series include the 863 Series Parts List (HY25-2863-M1_US), the 863 Series Sales Literature, and the 340/348/442/447/489/660/680/823/863/880 Series Owner's Manual.