The Chelsea 877XEQTP-M5RY or 877XEQTPM5RY is a constant-mesh power take-off from the 877 Series, designed for 10-bolt Allison transmission mounting. Output is a 1-1/2" 10-tooth spline with a 1410 companion flange. Continuous torque is rated up to 670 lb-ft (check application pages for actual ratings), with intermittent torque exceeding 501 lb-ft. Shaft power reaches 64 HP at 500 RPM and 128 HP at 1000 RPM. The compact housing reduces clearance conflicts, rotatable output flanges allow two assembly arrangements to maximize installation clearance, and Wet Spline Technology extends the service life of the PTO and pump shaft. Suited for refuse, aerial, fire and rescue, snow and ice, and oil and gas equipment. Call us to confirm proper fit for your specific application.
Features
10-bolt mounting for Allison transmissions
Constant-mesh shift type for continuous-operation applications such as load-sense pump setups
Output: 1-1/2" 10-tooth spline with 1410 series companion flange
Continuous torque up to 670 lb-ft; intermittent torque 501+ lb-ft (verify actual rating on application pages)
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Compact housing, rotatable output flanges, and Wet Spline Technology for extended PTO and pump 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 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 1000 RPM (48 kW at 500 RPM, 95 kW at 1000 RPM)
Additional Information
The Chelsea 877 Series is noted for power density in demanding continuous-operation hydraulic applications. Eight internal gear ratios are available across the series to match a wide variety of output speed requirements. Pressure lubrication is integrated into the PTO housing, with one hose required for installation. Typical markets include aerial work platforms, refuse trucks, snow and ice equipment, fire and rescue trucks, oil and gas vehicles, and defense applications. Parker Chelsea lists this series as obsolete. Existing units remain serviceable; call Pro Gear and Transmission to confirm part availability and fitment for your chassis and transmission combination.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
