The Chelsea 877XAKVW-M5RF or 877XAKVWM5RF is a constant-mesh power take-off from the Chelsea 877 Series, designed for 10-bolt Allison transmission applications with high-torque, continuous-duty requirements. Output is through a 1-1/2" 10-spline shaft with a 1410 companion flange. Intermittent torque rating exceeds 501 lb-ft, and continuous torque reaches up to 670 lb-ft (check application pages for actual ratings). Shaft power is rated at 64 HP at 500 RPM and 128 HP at 1,000 RPM. The compact housing is engineered to reduce clearance conflicts, and two assembly arrangements allow rotatable output flanges to fit tight installations. Wet Spline Technology helps extend the service life of the PTO and connected pump shaft. Common 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 continuous-duty, no-disengage applications such as load-sense pumps
Output shaft: 1-1/2" 10-spline with 1410 series companion flange
Intermittent torque: 501+ lb-ft; continuous torque up to 670 lb-ft (verify actual rating for your application)
Shaft power: 64 HP at 500 RPM, 128 HP at 1,000 RPM
Compact housing with rotatable output flanges and Wet Spline Technology to reduce clearance issues and extend pump shaft life
Tech Specs
- Mounting Type: 10-Bolt
- Transmission Manufacturer: Allison
- Shift Type: Constant Mesh
- Output Shaft Type: 1-1/2" 10-Spline with 1410 Series 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 noted for power density in demanding, continuous-duty installations. Eight internal gear ratios provide a range of output speeds to suit varied hydraulic system requirements. Pressure lubrication is integrated into the PTO housing and requires a single hose connection for a simplified installation. The series supports applications in aerial, refuse, snow and ice, fire and rescue, oil and gas, and defense markets. Parker Chelsea lists the 877 Series as obsolete; availability may be limited. Contact Pro Gear and Transmission to verify current availability and confirm correct fitment for your transmission and chassis.Parts Manual: Chelsea 877 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
