The Chelsea 221 Series Power Take-Off Assembly, part number 221REAJP-A3XR or 221REAJPA3XR, is a 6-bolt mounted PTO built for low-speed, heavy-duty service on vocational trucks including dump trucks, aerial units, and tow and recovery vehicles. It uses a wire/cable mechanical shift and delivers up to 250 lb-ft (339 Nm) intermittent torque, with shaft power rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. The 1-1/4" round output shaft with keyway suits a wide range of hydraulic pump interfaces. A cast iron housing and tapered cone output bearings provide long service life under sustained load. Compatible transmissions include Allison, Eaton/Fuller, Volvo/Mack, and Hino. Available in standard or low-profile housing configurations. Call us to confirm the correct fit for your truck and transmission combination.
Features
6-bolt mounting configuration for a secure transmission interface
Wire/cable mechanical shift for straightforward engagement
1-1/4" round output shaft with keyway for versatile pump connection
Intermittent torque rating up to 250 lb-ft (339 Nm); verify actual rating on application pages
Shaft power: 24 HP at 500 RPM, 48 HP at 1,000 RPM
Greaseable pump shafts help reduce spline fretting and corrosion
Available in standard or low-profile housing to fit tight under-cab clearances
Tech Specs
- Intermittent Torque: 250 lb-ft / 339 Nm (check application pages for actual torque ratings)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 46-55 HP / 31-40 kW
- Output Shaft Type: 1-1/4" Round with 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 Transmissions: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
Additional Information
