Features
8-bolt mounting for compatibility with most manual transmissions including Allison, Eaton/Fuller, and Volvo/Mack
Lever mechanical shift with optional air control shift available
1-1/2"-10T spline output shaft with 1410 series companion flange
Intermittent torque rating: 500 lb-ft (678 Nm); check application pages for verified ratings
Shaft power: 48 HP at 500 RPM, 95 HP at 1000 RPM
Removable shift cover allows simpler, more accurate backlash adjustment
Dual-pump output design permits mounting a hydraulic pump on each end of the PTO
Tech Specs
- Mounting Type: 8-Bolt
- Shift Type: Lever Mechanical
- Output Shaft Type: 1-1/2" - 10T Spline with 1410 Series Companion Flange
- Intermittent Torque: 500 lb-ft / 678 Nm (check application pages for verified ratings)
- Output Power: 56+ HP / 51+ kW
- Shaft Power: 48 HP (500 RPM), 95 HP (1000 RPM) / 36 kW (500 RPM), 71 kW (1000 RPM)
- Transmission Compatibility: Allison, Eaton/Fuller, Volvo/Mack, and other 8-bolt aperture transmissions
- Continuous Operation: Yes, with 30% de-rating
Additional Information

The Chelsea 880 Series is suited for demanding mobile and on-highway applications including bulk haulers, fire trucks, oil field equipment, winch systems, and large truck recovery. The cast iron housing is paired with tapered cone bearings for load-bearing strength across high- and low-speed use. The removable shift cover simplifies backlash adjustment during installation. Constant mesh input gears keep the unit engaged across a wide RPM range. For Detroit DT12-equipped vehicles, consult the Chelsea Detroit DT12 Adapter Owner's Manual for 880 Series compatibility notes. Reference Chelsea 880 Series Parts List HY25-2880-M1_US and Service Manual HY25-6880-M1/US for detailed assembly and service information.
Parts Manual: Chelsea 880 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.