The Chelsea 221 Series Power Take-Off Assembly, part number 221XLAHX-A3XQ or 221XLAHXA3XQ, is a 6-bolt mounted PTO built for low-speed, heavy-duty service on dump trucks, tow and recovery vehicles, and aerial equipment. It operates with a wire/cable mechanical shift and delivers up to 48 HP (36 kW) at 1,000 RPM via a 1-1/4" round output shaft with keyway. Intermittent torque ratings reach 250 lb-ft (339 Nm) - verify actual torque against the application pages for your specific installation. Compatible transmissions include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. The cast iron housing accepts either a standard or low-profile configuration. Call us to confirm proper fit for your application.
The Chelsea 221 Series is engineered for low-speed, heavy-duty vocational applications including dump trucks, tow and recovery, and aerial equipment. The series features tapered cone output bearings - chosen over needle bearings for greater load-bearing capability - and a 360-degree rotatable flange option. The air shift cover design is space-saving, providing maximum clearance under the truck. Greaseable pump shafts are standard on this series to minimize spline fretting and corrosion over the service life of the unit. Continuous operation is supported with a 30% de-rating applied. Parker Chelsea lists the 221 Series as an obsolete series; Pro Gear and Transmission can help you identify current cross-references or confirm part availability - give us a call.
Features
6-bolt mounting for Allison, Eaton/Fuller, Volvo/Mack, Hino, and other compatible transmissions
Wire/cable mechanical shift operation
1-1/4" round output shaft with keyway
Intermittent torque up to 250 lb-ft (339 Nm) - check application pages for your specific rating
Shaft power: 24 HP (18 kW) at 500 RPM, 48 HP (36 kW) at 1,000 RPM
Available in standard or special low-profile housing; greaseable pump shafts resist spline fretting and corrosion
Tech Specs
- Intermittent Torque: 250 lb-ft / 339 Nm (check application pages for actual torque ratings for your installation)
- Shift Type: Wire/Cable, Mechanical
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with key
- Output Power: 46-55 HP / 31-40 kW
- Shaft Power: 24 HP (18 kW) at 500 RPM; 48 HP (36 kW) at 1,000 RPM
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, Hino, and others
- Housing: Standard or low-profile
Additional Information
The Chelsea 221 Series is engineered for low-speed, heavy-duty vocational applications including dump trucks, tow and recovery, and aerial equipment. The series features tapered cone output bearings - chosen over needle bearings for greater load-bearing capability - and a 360-degree rotatable flange option. The air shift cover design is space-saving, providing maximum clearance under the truck. Greaseable pump shafts are standard on this series to minimize spline fretting and corrosion over the service life of the unit. Continuous operation is supported with a 30% de-rating applied. Parker Chelsea lists the 221 Series as an obsolete series; Pro Gear and Transmission can help you identify current cross-references or confirm part availability - give us a call.
