The Chelsea 877XGFJP-M5AC or 877XGFJPM5AC is a constant mesh power take-off from the Chelsea 877 Series, designed for 10-bolt Allison transmission applications with high torque and continuous-duty requirements. It delivers up to 670 lb-ft continuous torque (verify actual rating on application pages) and 128 HP shaft power at 1,000 RPM. The output shaft is a 1-1/2" 10-tooth spline with a 1410 companion flange. Compact housing height helps reduce clearance conflicts during installation, and rotatable output flanges give installers additional positioning flexibility. Wet Spline Technology is integrated to extend service life at the PTO-to-pump interface. Common applications include refuse trucks, aerial units, snow and ice equipment, and fire and rescue vehicles. Note: Parker Chelsea lists the 877 Series as obsolete. Call us to confirm availability and fitment for your specific application.
Parker Chelsea lists the 877 Series as obsolete. Contact Pro Gear and Transmission to confirm current availability and to verify this part number fits your specific Allison transmission and application.
Features
10-bolt mounting for Allison transmission applications
Constant mesh shift type, suitable for continuous-operation loads
1-1/2" 10-tooth spline output shaft with 1410 companion flange
Continuous torque up to 670 lb-ft; 128 HP shaft power at 1,000 RPM
Compact housing design to reduce installation clearance conflicts
Wet Spline Technology integrated to 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-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 Torque Ratings
- 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 engineered for demanding, continuous-duty work cycles where the PTO does not need to disengage during operation - making it well suited for load-sense pump applications. Eight internal gear ratios are available across the series to match a wide range of output speed requirements. Pressure lubrication is integrated directly into the PTO housing, requiring only a single hose connection for installation. Two assembly arrangements are offered to maximize clearance in tight installations. Markets served by this series include aerial, refuse, snow and ice, defense, and fire and rescue applications.Parker Chelsea lists the 877 Series as obsolete. Contact Pro Gear and Transmission to confirm current availability and to verify this part number fits your specific Allison transmission and application.
Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
