The Chelsea 877 Series Power Take-Off, part number 877XDFJW-M5RS or 877XDFJWM5RS, is a 10-bolt, constant-mesh PTO designed for Allison transmissions. The output shaft is a 1-1/2" 10-tooth spline with a 1410 companion flange. Continuous torque rating reaches 670 lb-ft (908 Nm) - verify actual torque for your specific application. Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1000 RPM. The compact housing reduces clearance issues, and rotatable output flanges give additional installation flexibility. Wet Spline Technology is integrated to extend PTO and pump shaft service life. Common applications include refuse trucks, aerial units, snow and ice equipment, and fire and rescue trucks. Pro Gear and Transmission sells this genuine Chelsea part. Call us to confirm proper fit for your application.
Features
10-bolt mounting for Allison transmissions
Constant-mesh shift type - no disengagement needed for load-sense pump applications
Output: 1-1/2" 10-tooth spline with 1410 companion flange
Continuous torque up to 670 lb-ft (908 Nm); verify rating for your specific application
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM
Wet Spline Technology to extend PTO and pump shaft life
Compact housing height with rotatable output flanges for easier installation clearance
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
- Output Power: 56+ HP, 51+ kW
- Shaft Power: 64 HP (500 RPM), 128 HP (1000 RPM), 48 kW (500 RPM), 95 kW (1000 RPM)
- Intermittent Torque: 501+ lb-ft, 501+ Nm
- Continuous Torque: 670 lb-ft, 908 Nm (check application pages for actual torque ratings)
Additional Information
The Chelsea 877 Series is suited for demanding, continuous-duty applications including refuse trucks, aerial equipment, snow and ice control vehicles, fire and rescue trucks, and oil and gas units. The series features eight internal gear ratios to accommodate a wide range of speed requirements. Pressure lubrication is integrated into the PTO housing and requires a single hose connection for simplified installation. The 877 Series is rated for continuous operation - no de-rating is needed for continuous-duty use. Note: Parker Chelsea lists the 877 Series as obsolete. Confirm current availability and proper fitment before ordering, or call Pro Gear and Transmission for assistance.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
