The Chelsea 877XDFJW-M5RY or 877XDFJWM5RY is a constant-mesh power take-off from the Chelsea 877 Series, designed for 10-bolt Allison transmission applications. The output shaft is a 1-1/2" 10-spline configuration with a 1410 companion flange. Continuous torque rating reaches 670 lb-ft (check application pages for actual torque ratings), with intermittent torque above 501 lb-ft. Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1000 RPM. The compact housing lowers installation height to reduce clearance conflicts, and rotatable output flanges allow further adjustment during mounting. Wet Spline Technology is incorporated to extend the service life of the PTO and mating pump shaft. Pressure lubrication is integrated into the housing. Common applications include refuse trucks, snow and ice equipment, aerial units, and fire and rescue trucks. Call us to confirm proper fit for your specific transmission and application.
Features
Constant mesh shift type, suited for load-sense pump applications that run continuously
10-bolt mounting for Allison transmission applications
Output shaft: 1-1/2" 10-spline with 1410 series companion flange
Continuous torque up to 670 lb-ft (verify rating on application pages); intermittent torque rated 501+ lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Compact housing height reduces clearance issues; rotatable output flanges allow installation flexibility
Wet Spline Technology helps 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
- Lubrication: Pressure lube with Wet Spline Technology
Additional Information
Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
