The Chelsea 877XCFJW-M5RS or 877XCFJWM5RS is a constant-mesh power take-off built for Allison transmissions using a 10-bolt mounting pattern. Output is through a 1-1/2" 10-spline shaft with a 1410 companion flange. The 877 Series delivers shaft power of 64 HP at 500 RPM and 128 HP at 1,000 RPM, with continuous torque up to 670 lb-ft and intermittent torque rated at 501+ lb-ft. Wet Spline Technology is integrated to extend service life on both the PTO and pump shaft. The compact housing reduces clearance concerns, and the rotatable output flange allows installation flexibility. Suited for refuse, aerial, snow and ice, fire and rescue, and oil and gas applications. Call us to confirm proper fit for your specific transmission and chassis.
Features
Constant mesh shift type, no disengagement required during operation
10-bolt mounting for Allison transmission applications
1-1/2" 10-spline output shaft with 1410 series companion flange
64 HP at 500 RPM, 128 HP at 1,000 RPM shaft power output
Continuous torque up to 670 lb-ft (check application pages for actual ratings)
Wet Spline Technology for extended PTO and pump shaft service life
Compact housing height with rotatable output flange for installation clearance
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 1,000 RPM / 48 kW at 500 RPM, 95 kW at 1,000 RPM
Additional Information
The Chelsea 877 Series is a constant-mesh PTO designed for demanding, high-torque work cycles including refuse trucks, aerial equipment, fire and rescue, snow and ice control, and oil and gas service vehicles. Constant mesh design suits load-sense pump installations where continuous engagement is required. Eight internal gear ratios are available across the 877 Series to match a wide range of pump speed requirements. Pressure lubrication is integrated into the PTO housing, requiring only one hose connection for installation. The series supports continuous operation without de-rating. For application-specific torque ratings and gear ratio confirmation, consult the Chelsea 877 Series application pages or contact Pro Gear and Transmission directly.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
