The Chelsea 221 Series Power Take-Off Assembly, part number 221XEDAX-V3XD or 221XEDAXV3XD, is a 6-bolt mounted PTO built for low-speed, heavy-duty vocational applications including dump trucks, tow and recovery, and aerial equipment. Shift type is wire/cable mechanical. The 1-1/4" round output shaft includes a keyway. Intermittent torque rating for the 221 Series reaches 250 lb-ft (339 Nm); check Chelsea application pages for the exact rating for your specific installation. Output power runs 46-55 HP (31-40 kW), with shaft power rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. Compatible transmission manufacturers include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. The cast iron housing is available in standard or low-profile configurations. Call us to confirm proper fit for your application.
The Chelsea 221 Series PTO uses tapered cone output bearings rather than needle bearings, which increases load-bearing capability and extends service life in demanding vocational cycles. The 221 Series offers twenty-six output options, three internal speed ratios, and eleven shift configurations. The 360-degree rotatable pump flange is available on select configurations. A self-lube option is offered for transmissions with marginal PTO port lubrication. Typical applications include dump trucks, tow and recovery vehicles, and aerial equipment. The series is built around a cast iron housing and carries an SAE A, SAE B, ISO 7652, and driveline output flange compatibility at the series level.
Features
6-bolt mounting type for broad transmission compatibility
Wire/cable mechanical shift operation
1-1/4" round output shaft with 5/16" key
Intermittent torque rating up to 250 lb-ft (339 Nm) - verify on Chelsea application pages
Shaft power: 24 HP at 500 RPM, 48 HP at 1,000 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 (check Chelsea application pages for actual rating by application)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 46-55 HP / 31-40 kW
- Output Shaft Type: 1-1/4" Round with 5/16" key
- Mounting Type: 6-Bolt
- Shaft Power: 24 HP at 500 RPM / 48 HP at 1,000 RPM (18 kW at 500 RPM / 36 kW at 1,000 RPM)
- Compatible Transmission Manufacturers: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
- Housing: Standard or low-profile
Additional Information
The Chelsea 221 Series PTO uses tapered cone output bearings rather than needle bearings, which increases load-bearing capability and extends service life in demanding vocational cycles. The 221 Series offers twenty-six output options, three internal speed ratios, and eleven shift configurations. The 360-degree rotatable pump flange is available on select configurations. A self-lube option is offered for transmissions with marginal PTO port lubrication. Typical applications include dump trucks, tow and recovery vehicles, and aerial equipment. The series is built around a cast iron housing and carries an SAE A, SAE B, ISO 7652, and driveline output flange compatibility at the series level.
