The Chelsea 221 Series Power Take-Off assembly, part number 221XLAHX-A5XK or 221XLAHXA5XK, is a 6-bolt mounted PTO built for low-speed, heavy-duty work on vehicles equipped with Allison, Eaton/Fuller, Volvo/Mack, Hino, or other compatible transmissions. It delivers an intermittent torque rating up to 250 lb-ft (339 Nm) with shaft power of 24 HP at 500 RPM and 48 HP at 1,000 RPM. The output shaft is a 1-1/4" round with keyway, and the unit shifts via wire/cable mechanical actuation. A cast iron housing with tapered cone output bearings provides strong load-bearing capability over standard needle-bearing designs. Continuous operation is supported with a 30% de-rating. Call us to confirm proper fit for your application.
The Chelsea 221 Series is suited to aerial, dump truck, tow and recovery, and vocational municipal equipment applications. The cast iron housing and tapered cone output bearings deliver greater load-bearing capability compared to needle-bearing designs. Three internal speed ratios, twenty-six output options including a 360-degree rotatable flange, and a self-lube option for transmissions with restricted PTO lubrication make this a versatile series. A low-profile housing variant is available where cab or body clearance is limited. Greaseable pump shafts are included to minimize spline fretting and corrosion in demanding duty cycles.
Features
6-bolt mounting, compatible with Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmission families
1-1/4" round output shaft with keyway
Wire/cable mechanical shift actuation
Intermittent torque up to 250 lb-ft (339 Nm); check application pages for actual rating
Shaft power: 24 HP at 500 RPM, 48 HP at 1,000 RPM
Available in standard or low-profile housing; greaseable pump shafts reduce spline fretting and corrosion
Tech Specs
- Intermittent Torque: 250 lb-ft / 339 Nm (check application pages for actual torque ratings)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 46-55 HP / 31-40 kW
- Output Shaft Type: 1-1/4" Round with keyway
- Transmission Manufacturer: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
- Mounting Type: 6-Bolt
- Shaft Power: 24 HP (500 RPM), 48 HP (1,000 RPM) / 18 kW (500 RPM), 36 kW (1,000 RPM)
- Continuous Operation: Yes, with 30% de-rating
Additional Information
The Chelsea 221 Series is suited to aerial, dump truck, tow and recovery, and vocational municipal equipment applications. The cast iron housing and tapered cone output bearings deliver greater load-bearing capability compared to needle-bearing designs. Three internal speed ratios, twenty-six output options including a 360-degree rotatable flange, and a self-lube option for transmissions with restricted PTO lubrication make this a versatile series. A low-profile housing variant is available where cab or body clearance is limited. Greaseable pump shafts are included to minimize spline fretting and corrosion in demanding duty cycles.
