The Chelsea 877 Series Power Take-Off, part number 877XCLNW-M5RS or 877XCLNWM5RS, is a constant-mesh, 10-bolt PTO designed for Allison transmissions in demanding continuous-duty applications. The output shaft is a 1-1/2" 10-spline configuration fitted with a 1410 companion flange. Continuous torque capacity reaches 670 lb-ft (908 Nm) at rated conditions; intermittent torque is rated at 501+ lb-ft. Shaft power is 64 HP at 500 RPM and 128 HP at 1,000 RPM. The compact housing reduces installation clearance conflicts, and rotatable output flanges allow two assembly arrangements for tighter installations. Wet Spline Technology is integrated to extend the service life of both the PTO and the connected pump shaft. Typical applications include refuse trucks, aerial units, snow and ice equipment, and fire and rescue apparatus. Call us to confirm proper fit for your specific Allison transmission configuration.
Features
Constant-mesh shift type - no disengagement needed, suited for load-sense pump applications
10-bolt mounting for Allison transmissions
Output shaft: 1-1/2" 10-spline with 1410 series companion flange
Continuous torque up to 670 lb-ft (908 Nm); intermittent torque rated 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 offer two installation arrangements
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-Spline with 1410 Series 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 at 500 RPM, 128 HP at 1,000 RPM (48 kW at 500 RPM, 95 kW at 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.
