The Chelsea 877 Series Power Take-Off, part number 877XEFJW-M5RS or 877XEFJWM5RS, is a 10-bolt, constant-mesh PTO designed for Allison transmissions in demanding continuous-duty applications. Output is through a 1-1/2" 10-tooth spline with a 1410 companion flange. Continuous torque capacity reaches 670 lb-ft (908 Nm), with intermittent ratings above 501 lb-ft. Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1,000 RPM. The compact housing keeps overall height down to reduce clearance conflicts, and the two assembly arrangements let installers rotate the output flange to maximize available clearance. Wet Spline Technology is integrated to extend service life at the PTO and pump shaft interface. Suited for refuse, aerial, snow and ice, fire and rescue, and oil and gas applications. Call us to confirm this unit fits your specific transmission and mounting configuration.
Features
10-bolt mounting for Allison transmission applications
Constant-mesh shift type, suited for continuous-duty and load-sense pump setups
1-1/2" 10-tooth spline output with 1410 series companion flange
Continuous torque up to 670 lb-ft (908 Nm); intermittent rating above 501 lb-ft
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Compact housing with rotatable output flange and Wet Spline Technology to reduce clearance issues and extend shaft 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
- Continuous Torque: 670 lb-ft / 908 Nm (verify actual rating on application pages)
- Intermittent Torque: 501+ lb-ft / 501+ Nm
- 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)
Additional Information
Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
