The Chelsea 877 Series Power Take-Off, part number 877XAFJP-M5AC or 877XAFJPM5AC, 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-tooth spline with a 1410 companion flange. Continuous torque rating reaches 670 lb-ft (908 Nm); intermittent torque is rated at 501+ lb-ft. Shaft power measures 64 HP at 500 RPM and 128 HP at 1000 RPM. Eight internal gear ratios give wide speed flexibility. The compact housing limits clearance conflicts during installation, and rotatable output flanges add further mounting flexibility. Wet Spline Technology helps extend both PTO and pump shaft service life. Suited for refuse, aerial, snow and ice, fire and rescue, and oil and gas applications. Call us to confirm proper fit for your application.
Features
Constant mesh shift type, no disengagement required for load-sense pump applications
10-bolt mounting for Allison transmissions
Output shaft: 1-1/2" 10-tooth spline with 1410 companion flange
Continuous torque up to 670 lb-ft (908 Nm); intermittent torque 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Compact housing reduces clearance issues; rotatable output flanges add installation flexibility
Wet Spline Technology extends 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-Tooth Spline with 1410 Companion Flange
- Continuous Torque: 670 lb-ft / 908 Nm (check application pages for actual torque ratings)
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- 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
Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
