The Chelsea 877 Series Power Take-Off, part number 877XDFJW-M3RS or 877XDFJWM3RS, is a 10-bolt constant mesh PTO engineered for Allison transmissions running high-torque, continuous-duty applications. Output is through a 1410 companion flange with a 1-1/2" 10-tooth spline. Continuous torque is rated up to 670 lb-ft (check application pages for your exact rating); intermittent torque is 501+ lb-ft. Shaft power reaches 128 HP at 1,000 RPM. The compact housing limits clearance conflicts, and rotatable output flanges give additional mounting flexibility. Wet Spline Technology is integrated to extend the service life of both the PTO and pump shaft. Typical markets include refuse, aerial, snow and ice, and fire and rescue. Call us to confirm proper fit for your application.
Features
10-bolt mounting for Allison transmissions
Constant mesh shift type - no disengagement required, suited for load-sense pump use
1410 companion flange output with 1-1/2" 10-tooth spline
Continuous torque up to 670 lb-ft; intermittent torque 501+ lb-ft (verify rating on application pages)
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Compact housing height and rotatable output flanges reduce clearance conflicts
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: 1410 Companion Flange, 1-1/2" 10-Tooth Spline with 1410 Flange
- Continuous Torque: 670 lb-ft / 908 Nm (check application pages for actual torque ratings)
- 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
The Chelsea 877 Series is a constant mesh PTO family built for 10-bolt applications with demanding, continuous-duty workloads. Eight internal gear ratios cover a wide range of output speeds to match various pump and driveline requirements. The series is noted for use on refuse trucks, aerial equipment, snow and ice vehicles, fire and rescue trucks, and defense applications. Pressure lubrication is integrated into the PTO housing and requires only a single hose connection for installation. Rotatable direct-mount pump flange configurations are available within the 877 Series to suit different installation layouts. Two assembly arrangements are offered to maximize installation clearance. Part number 877XDFJW-M3RS is also referenced as SP877XDFJW-M3RS. Parker Chelsea documents for this series include the 877 Series Owners Manual (HY25-1380-M1_US) and Parts List (HY25-2870-M1_US). Note: Parker Chelsea lists the 877 Series as obsolete. Contact Pro Gear and Transmission to confirm availability and proper fit for your specific application.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
