877XAFJP-M3AC Chelsea 877 Series PTO

The Chelsea 877 Series Power Take-Off, part number 877XAFJP-M3AC or 877XAFJPM3AC, is a constant-mesh, 10-bolt PTO designed for Allison transmission applications with demanding, continuous-duty workloads. The output shaft is a 1-1/2" 10-spline shaft with a 1410 companion flange. Continuous torque rating reaches 670 lb-ft (908 Nm) - verify your exact application on the Chelsea application pages. Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1000 RPM. The compact housing reduces installation clearance conflicts, and rotatable output flanges provide additional flexibility during mounting. Wet Spline Technology is integrated to extend service life for both the PTO and connected pump shaft. Suited for refuse, aerial, snow and ice, fire and rescue, and oil and gas truck applications. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.

Features

10-bolt mounting for Allison transmission applications
Constant-mesh shift type, suited for continuous-duty and load-sense pump use
1-1/2" 10-spline output shaft with 1410 series companion flange
Continuous torque up to 670 lb-ft (908 Nm); shaft power 64 HP at 500 RPM, 128 HP at 1000 RPM
Compact housing height reduces installation clearance issues
Wet Spline Technology to extend PTO and pump shaft service life

Tech Specs

• Mounting Type: 10-Bolt
• Transmission Manufacturer: Allison
• Shift Type: Constant Mesh
• Output Shaft Type: 1-1/2" 10-Spline with 1410 Series 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 1000 RPM (48 kW at 500 RPM, 95 kW at 1000 RPM)

Additional Information

The Chelsea 877 Series is rated for continuous operation without de-rating. Eight internal gear ratios are available across the series, providing a wide range of output speeds. The pressure lubrication system is integrated into the PTO housing and requires a single hose connection; the hose is included with the unit. Rotatable direct-mount pump flange options are available in addition to the driveline output configuration. Common markets for this series include aerial, defense, on-highway, and other mobile applications. Specific truck types include refuse trucks, pumper cleaners, fire and rescue, snow and ice equipment, and oil and gas vehicles. Note: Parker Chelsea lists the 877 Series as obsolete. Contact Pro Gear and Transmission to confirm current availability and proper fitment for your specific truck and transmission.

Parts manual and diagrams: Chelsea 877 Series PTO parts list with prices