The Chelsea 877XAFJP-M5RY or 877XAFJPM5RY is a constant-mesh power take-off from the Chelsea 877 Series, engineered 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 reaches 670 lb-ft (908 Nm) - verify your specific application against Chelsea application pages for actual ratings. Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1,000 RPM. The compact housing lowers overall height to reduce clearance conflicts, and two assembly arrangements give installers flexibility in tight bays. Pressure lubrication is integrated into the PTO housing and requires a single hose, which is included. A genuine Chelsea part available from Pro Gear and Transmission - call us to confirm proper fit for your application.
The Chelsea 877 Series is designed for high-torque, continuous-duty applications across aerial, refuse, snow and ice, fire and rescue, oil and gas, and defense truck platforms. The series offers eight internal gear ratios to match a wide range of output speed requirements. Pressure lubrication is built into the housing with a single-hose connection - the hose ships with the unit. Rotatable direct-mount pump flange configurations and Wet Spline Technology are available within the series. This series is listed as obsolete by Parker Chelsea; Pro Gear and Transmission can help you confirm availability or identify a current replacement - give us a call.
Features
10-bolt mounting for Allison transmission applications
Constant-mesh shift type for continuous-duty, load-sense pump applications
Output: 1-1/2" 10-tooth spline with 1410 companion flange
Continuous torque up to 670 lb-ft (908 Nm) - check application pages for verified rating
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Wet Spline Technology to extend PTO and pump shaft service life
Compact housing height reduces installation clearance issues
Rotatable output flanges allow two assembly arrangements to maximize clearance
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 (verify rating on Chelsea application pages)
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- 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)
- Lubrication: Pressure lube integrated into PTO housing
Additional Information
The Chelsea 877 Series is designed for high-torque, continuous-duty applications across aerial, refuse, snow and ice, fire and rescue, oil and gas, and defense truck platforms. The series offers eight internal gear ratios to match a wide range of output speed requirements. Pressure lubrication is built into the housing with a single-hose connection - the hose ships with the unit. Rotatable direct-mount pump flange configurations and Wet Spline Technology are available within the series. This series is listed as obsolete by Parker Chelsea; Pro Gear and Transmission can help you confirm availability or identify a current replacement - give us a call.
Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
