The Chelsea 877 Series Power Take-Off, part number 877XAFJP-M3RS or 877XAFJPM3RS, is a constant-mesh PTO designed for 10-bolt Allison transmission applications with demanding, continuous-duty workloads. The output shaft is a 1-1/2" 10-spline configuration fitted with a 1410 companion flange for direct driveline connection. Continuous torque is rated at 670 lb-ft (check application pages for actual torque ratings), with intermittent torque exceeding 501 lb-ft. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. The compact housing addresses tight installation clearances, and rotatable output flanges offer two assembly arrangements to further maximize clearance. Wet Spline Technology is integrated to extend the service life of both the PTO and pump shaft. Typical applications include refuse trucks, aerial units, snow and ice equipment, and fire and rescue vehicles. Call us to confirm proper fit for your application.

• Mounting Type: 10-Bolt
• Transmission Manufacturer: Allison
• Shift Type: Constant Mesh
• Output Shaft Type: 1-1/2" 10-Spline with 1410 Companion Flange
• Intermittent Torque: 501+ lb-ft / 501+ Nm
• Continuous Torque: 670 lb-ft / 908 Nm (check application pages for actual torque ratings)
• Output Power: 56+ HP / 51+ kW
• Shaft Power: 64 HP at 500 RPM, 128 HP at 1,000 RPM / 48 kW at 500 RPM, 95 kW at 1,000 RPM

The Chelsea 877 Series is suited for snow and ice, refuse, aerial, and defense truck applications. Eight internal gear ratios provide a wide range of output speeds. Pressure lubrication is integrated into the PTO housing, simplifying installation. The series supports continuous operation without de-rating, making it a practical choice for high-demand vocational work cycles.