The Chelsea 877XCFJW-M3RY or 877XCFJWM3RY is a constant-mesh power take-off from the Chelsea 877 Series, designed for 10-bolt Allison transmission applications with high torque and demanding duty cycles. The output shaft is a 1-1/2" 10-tooth spline paired with a 1410 companion flange, delivering continuous torque rated up to 670 lb-ft (908 Nm) and shaft power of 64 HP at 500 RPM and 128 HP at 1000 RPM. Intermittent torque exceeds 501 lb-ft. The compact housing reduces clearance concerns, and rotatable output flanges allow further installation flexibility. Wet Spline Technology is incorporated to extend 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 specific transmission and mounting configuration.
Features
Constant mesh shift type, no disengagement required for load-sense pump applications
10-bolt mounting for high-torque Allison transmission installations
Continuous torque up to 670 lb-ft (908 Nm); verify actual rating on application pages
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Output shaft: 1-1/2" 10-tooth spline with 1410 companion flange
Compact housing, rotatable output flanges, and Wet Spline Technology for extended PTO and pump shaft life
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh
- Transmission Manufacturer: Allison
- Output Shaft Type: 1-1/2" 10-tooth spline with 1410 companion flange
- Intermittent Torque: 501+ lb-ft, 501+ Nm
- Continuous Torque: 670 lb-ft, 908 Nm (verify actual rating on application pages)
- 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 for ongoing duty cycles. The series supports eight internal gear ratios, providing a wide range of output speeds to suit varied hydraulic system requirements. Markets served include aerial, defense, on-highway, and other mobile applications, with specific suitability for refuse trucks, snow and ice equipment, fire and rescue pumpers, and oil and gas service vehicles. Pressure lubrication is integrated into the PTO housing and requires a single hose connection, which is included with the unit. Two assembly arrangements are offered within the series to maximize installation clearance in tight installations.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
