The Chelsea 221 Series Power Take-Off, part number 221RCAJP-A5XR or 221RCAJPA5XR, is a 6-bolt mounted PTO designed for low-speed, heavy-duty applications including dump trucks, tow and recovery, and aerial equipment. It features a wire/cable mechanical shift and a 1-1/4" round output shaft with keyway. Intermittent torque is rated up to 250 lb-ft (339 Nm) - verify actual rating on Chelsea application pages for your specific setup. 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. Compatible transmissions include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. Call us to confirm proper fit for your application.
The Chelsea 221 Series is built around a cast iron housing with tapered cone output shaft bearings, which provide greater load capacity compared to needle-bearing designs. The 221 Series offers both a standard housing and a low-profile housing option to maximize clearance under the truck. Three internal speed ratios are available across the series, and the greaseable pump shaft design helps prevent spline fretting and corrosion over time. Compatible output flange options in the 221 Series include SAE A, SAE B, ISO 7652 pump flange, and driveline configurations. This PTO supports continuous operation with a 30% de-rating applied. Suited for aerial, vocational, municipal, dump truck, and tow-and-recovery installations.
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 actual rating
Shaft power: 24 HP at 500 RPM, 48 HP at 1,000 RPM
Greaseable pump shafts to reduce spline fretting and corrosion
Tech Specs
- Intermittent Torque: Up to 250 lb-ft / 339 Nm (check application pages for actual torque rating)
- 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 / 18 kW at 500 RPM; 48 HP at 1,000 RPM / 36 kW at 1,000 RPM
Additional Information
The Chelsea 221 Series is built around a cast iron housing with tapered cone output shaft bearings, which provide greater load capacity compared to needle-bearing designs. The 221 Series offers both a standard housing and a low-profile housing option to maximize clearance under the truck. Three internal speed ratios are available across the series, and the greaseable pump shaft design helps prevent spline fretting and corrosion over time. Compatible output flange options in the 221 Series include SAE A, SAE B, ISO 7652 pump flange, and driveline configurations. This PTO supports continuous operation with a 30% de-rating applied. Suited for aerial, vocational, municipal, dump truck, and tow-and-recovery installations.
