The Chelsea 877 Series Power Take-Off, part number 877XAFJW-M5RF or 877XAFJWM5RF, is a 10-bolt constant mesh PTO designed for Allison transmissions in high-demand applications. Output is via a 1-1/2" 10-tooth spline with a 1410 companion flange. Continuous torque is rated at 670 lb-ft (908 Nm), with shaft power reaching 128 HP at 1,000 RPM. The compact housing keeps clearance tight in crowded engine compartments. Rotatable output flanges give installers flexibility, and Wet Spline Technology helps extend the life of the PTO and connected pump shaft. Common applications include refuse trucks, snow and ice equipment, aerial trucks, and fire and rescue vehicles. Call us to confirm proper fit for your specific transmission and truck configuration.
Features
10-bolt mounting for Allison transmission applications
Constant mesh shift type, suited for continuous-operation setups such as load-sense pumps
Continuous torque rating: 670 lb-ft (908 Nm); check application pages for actual torque ratings
Output shaft: 1-1/2" 10-tooth spline with 1410 companion flange
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM (48 kW / 95 kW)
Wet Spline Technology and rotatable output flanges reduce wear and simplify installation clearance
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Constant Mesh
- Transmission Manufacturer: Allison
- 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 designed for demanding, continuous-duty work cycles - no de-rating is required for continuous operation. Eight internal gear ratios provide a wide range of output speeds to match hydraulic pump requirements. Pressure lubrication is integrated directly into the PTO housing; only a single hose connection is required, and that hose is included with the unit. The series is well established in aerial, refuse, snow and ice, fire and rescue, oil and gas, and defense truck markets. Parker has listed the 877 Series as obsolete in their current product lineup. Pro Gear and Transmission can help you source this part or identify a current replacement - give us a call.Parts manual and diagrams: Chelsea 877 Series PTO parts list with prices
