The Chelsea 877XDFJW-M3RY or 877XDFJWM3RY is a constant-mesh power take-off from the Chelsea 877 Series, designed for 10-bolt Allison transmission applications with high torque and demanding duty cycles. Output is through a 1-1/2" 10-tooth spline with a 1410 companion flange. Continuous torque reaches 670 lb-ft (908 Nm) - check application pages for your specific rating. Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1000 RPM. Intermittent torque is rated at 501+ lb-ft. The compact housing limits clearance problems, and rotatable output flanges allow further optimization at installation. Wet Spline Technology helps protect both the PTO and pump shaft over extended service. Typical markets include refuse trucks, aerial units, snow and ice equipment, and fire and rescue trucks. Call us to confirm proper fit for your application.
Features
Constant mesh design suits continuous-duty applications such as load-sense pump systems
10-bolt mounting for Allison transmissions
Output: 1-1/2" 10-tooth spline with 1410 companion flange
Continuous torque: 670 lb-ft (908 Nm) - verify actual rating on Chelsea application pages
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Compact housing with rotatable output flanges reduces installation clearance issues
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
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for actual rating
- 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 a Parker Chelsea product line built around power density for severe-duty mobile equipment. Eight internal gear ratios provide a wide range of output speeds. Pressure lubrication is integrated into the PTO housing and requires a single hose, which is included with the unit. Two assembly arrangements are offered to help maximize installation clearance. The 877 Series is suited for aerial, defense, on-highway, and other mobile applications including refuse trucks, snow and ice equipment, pumper cleaners, and fire and rescue trucks. Parker lists the 877 Series as an obsolete product line. Pro Gear and Transmission can help you identify available stock or 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.
