The Chelsea 221ZLAHX-A3XR or 221ZLAHXA3XR is a 6-bolt Power Take-Off assembly from the Chelsea 221 Series, engineered for low-speed, heavy-duty vocational applications including dump trucks, tow and recovery, and aerial equipment. It shifts via wire/cable mechanical actuation and mounts to transmissions from Allison, Eaton/Fuller, Volvo/Mack, Hino, and other manufacturers. The 1-1/4" round output shaft with keyway 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. A cast iron housing and tapered cone output bearings provide strong load-bearing capability over standard needle-bearing designs. Greaseable pump shafts reduce spline fretting and corrosion. Available in standard or low-profile housing configurations. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting pattern compatible with Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmission manufacturers
Wire/cable mechanical shift actuation
1-1/4" round output shaft with keyway
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 to reduce spline fretting and corrosion; available in standard or low-profile housing
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
- Shaft Power: 24 HP at 500 RPM, 48 HP at 1,000 RPM (18 kW at 500 RPM, 36 kW at 1,000 RPM)
- Output Shaft Type: 1-1/4" Round with key
- Mounting Type: 6-Bolt
- Transmission Compatibility: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
- Housing Options: Standard or low-profile
Additional Information
