The Chelsea 221 Series Power Take-Off, part number 221ZEAKP-M4XD or 221ZEAKPM4XD, is a 6-bolt mounted PTO assembly designed for low-speed, heavy-duty vocational applications including dump trucks, tow and recovery, and aerial equipment. It uses a wire/cable mechanical shift and accepts a 1-1/4" round output shaft with key. Intermittent torque is rated up to 250 lb-ft (339 Nm); confirm your actual rating against the Chelsea application pages for your specific transmission. Compatible transmissions include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. Output power reaches 46-55 HP (31-40 kW), with shaft power of 24 HP at 500 RPM and 48 HP at 1,000 RPM. The cast iron housing is available in standard or low-profile configurations. Call us to confirm proper fit for your transmission and application.
The Chelsea 221 Series is built around a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing capability in heavy-duty vocational service. The series supports twenty-six output options and three internal speed ratios, making it adaptable across a wide range of truck-mounted equipment including dump bodies, aerial lifts, and tow/recovery apparatus. The space-saving shift cover design maximizes clearance under the truck. Continuous operation is supported with a 30% de-rating applied. Part number 221ZEAKP-M4XD is sold by Pro Gear and Transmission.
Features
6-bolt mounting type compatible with Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmission manufacturers
Wire/cable mechanical shift actuation
1-1/4" round output shaft with key
Intermittent torque up to 250 lb-ft (339 Nm); verify actual rating on Chelsea application pages
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 Chelsea application pages for actual torque rating for your transmission)
- 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 (500 RPM), 48 HP (1,000 RPM) / 18 kW (500 RPM), 36 kW (1,000 RPM)
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
- Housing Options: Standard or Low-Profile
Additional Information
The Chelsea 221 Series is built around a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing capability in heavy-duty vocational service. The series supports twenty-six output options and three internal speed ratios, making it adaptable across a wide range of truck-mounted equipment including dump bodies, aerial lifts, and tow/recovery apparatus. The space-saving shift cover design maximizes clearance under the truck. Continuous operation is supported with a 30% de-rating applied. Part number 221ZEAKP-M4XD is sold by Pro Gear and Transmission.
