The Chelsea 877 Series Power Take-Off, part number 877XEFJP-M5RZ or 877XEFJPM5RZ, is a 10-bolt constant mesh PTO engineered for Allison transmission applications with high torque and demanding duty cycles. The output shaft is a 1-1/2" 10-tooth spline with a 1410 companion flange. Continuous torque is rated up to 670 lb-ft (908 Nm), with intermittent torque capability above 501 lb-ft. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1,000 RPM. A compact housing design reduces clearance concerns, rotatable output flanges add installation flexibility, and Wet Spline Technology extends the service life of the PTO and pump shaft. Pressure lubrication is integrated into the housing. Applications include refuse trucks, aerial units, snow and ice equipment, and fire and rescue vehicles. Call us to confirm proper fit for your application.
Features
10-bolt mounting for Allison transmission applications
Constant mesh shift type - no disengagement required, suited for load-sense pump use
Output: 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 1,000 RPM
Compact housing height reduces clearance issues; rotatable output flanges maximize 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
- Output Power: 56+ HP, 51+ kW
- Shaft Power: 64 HP (500 RPM), 128 HP (1,000 RPM), 48 kW (500 RPM), 95 kW (1,000 RPM)
- Continuous Torque: 670 lb-ft, 908 Nm (verify actual rating on application pages)
- Intermittent Torque: 501+ lb-ft, 501+ Nm
- Lubrication: Pressure Lube with Wet Spline Technology
Additional Information
The Chelsea 877 Series is designed for continuous-duty operation with no de-rating required for sustained use. Eight internal gear ratios accommodate a wide range of speed requirements. Pressure lubrication is integrated directly into the PTO housing and requires a single hose connection for installation. This series is noted for use in snow and ice, refuse, aerial, defense, and fire and rescue truck applications. Parker Chelsea lists the 877 Series as obsolete; Pro Gear and Transmission can help you confirm availability or identify a current replacement. Call us with your transmission model and application details.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
