The Chelsea 877XKFJW-M5RS or 877XKFJWM5RS is a 877 Series Power Take-Off built for 10-bolt Allison transmission applications with demanding, high-torque workloads. It operates in constant mesh, making it well suited for load-sense pump setups that run without disengaging. The output shaft is a 1-1/2" 10-spline configuration with a 1410 companion flange. Continuous torque capacity reaches 670 lb-ft (908 Nm); check application pages for verified ratings at your specific installation. Shaft power measures 64 HP at 500 RPM and 128 HP at 1000 RPM. A compact housing limits clearance conflicts, and rotatable output flanges provide installation flexibility. Pressure lubrication is integrated into the housing. Typical applications include refuse trucks, aerial units, snow and ice equipment, and fire and rescue vehicles. Call us to confirm proper fit for your application.
Features
10-bolt mounting for Allison transmission applications
Constant mesh shift type - suited for load-sense pump setups that run continuously
Output shaft: 1-1/2" 10-spline with 1410 companion flange
Continuous torque up to 670 lb-ft (908 Nm) - verify rating on application pages
Shaft power: 64 HP at 500 RPM, 128 HP at 1000 RPM (56+ HP output rating)
Wet Spline Technology and integrated pressure lubrication extend 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-Spline with 1410 Companion Flange
- Intermittent Torque: 501+ lb-ft (501+ Nm)
- Continuous Torque: 670 lb-ft (908 Nm) - check application pages for verified rating at your installation
- 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)
- Continuous Operation: Yes
Additional Information
The Chelsea 877 Series is engineered for applications requiring sustained, high-torque output without de-rating for continuous duty. Eight internal gear ratios are available across the series to match a wide range of speed requirements. Two assembly arrangements support installation clearance flexibility. The integrated pressure lube system requires only a single hose connection, and that hose is included with the unit. Common working environments include refuse, aerial, snow and ice, oil and gas, fire and rescue, and defense vehicles. Part number 877XKFJW-M5RS is also referenced as SP877XKFJW-M5RS in some catalog listings. Note: Parker Chelsea lists the 877 Series as obsolete in their current product catalog. Pro Gear and Transmission can help you locate this part or identify a suitable 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.
