The Chelsea 221 Series Power Take-Off Assembly, part number 221REAJP-W3XK or 221REAJPW3XK, is a 6-bolt mounted PTO built for low-speed, heavy-duty applications including dump trucks, tow and recovery, and aerial equipment. It ships with a wire/cable mechanical shift and a 1-1/4" round output shaft with keyway. Intermittent torque rating for the 221 Series runs up to 250 lb-ft (339 Nm) - verify your exact application on the Chelsea application pages. Output power reaches 46-55 HP (31-40 kW), with shaft power of 24 HP at 500 RPM and 48 HP at 1000 RPM. The cast iron housing uses tapered cone output bearings for strong load-bearing capability. Compatible transmissions include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. Call us to confirm proper fit for your application.
The 221 Series cast iron housing pairs with tapered cone output bearings - a stronger load-bearing design than needle bearings - making this unit well suited for vocational and municipal equipment, aerial platforms, dump trucks, and tow and recovery rigs. The 221 Series offers a 360-degree rotatable flange and multiple internal speed ratio options. Both standard and low-profile housing configurations are available to fit tighter chassis installations. Continuous operation is supported with a 30% de-rating applied. A self-lube option is available for transmissions that have difficulty delivering lubrication to the PTO. Relevant reference documents include the 221 Series Owner's Manual and Parts List HY25-2221-M1_US.
Features
6-bolt mounting type compatible with Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmissions
1-1/4" round output shaft with keyway
Wire/cable mechanical shift
Intermittent torque up to 250 lb-ft (339 Nm) - check application pages for exact rating
Shaft power: 24 HP at 500 RPM, 48 HP at 1000 RPM
Greaseable pump shafts to reduce spline fretting and corrosion
Available in standard or low-profile housing
Tech Specs
- Intermittent Torque: 250 lb-ft / 339 Nm (verify actual rating on Chelsea application pages)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 46-55 HP / 31-40 kW
- Output Shaft Type: 1-1/4" Round with Key
- Transmission Compatibility: Allison, Eaton/Fuller, Volvo/Mack, Hino, and other manufacturers
- Mounting Type: 6-Bolt
- Shaft Power: 24 HP at 500 RPM, 48 HP at 1000 RPM (18 kW at 500 RPM, 36 kW at 1000 RPM)
Additional Information
The 221 Series cast iron housing pairs with tapered cone output bearings - a stronger load-bearing design than needle bearings - making this unit well suited for vocational and municipal equipment, aerial platforms, dump trucks, and tow and recovery rigs. The 221 Series offers a 360-degree rotatable flange and multiple internal speed ratio options. Both standard and low-profile housing configurations are available to fit tighter chassis installations. Continuous operation is supported with a 30% de-rating applied. A self-lube option is available for transmissions that have difficulty delivering lubrication to the PTO. Relevant reference documents include the 221 Series Owner's Manual and Parts List HY25-2221-M1_US.
