The Chelsea 221 Series Power Take-Off, part number 221ZCDAX-A5XK or 221ZCDAXA5XK, is a 6-bolt mounted PTO designed for low-speed, heavy-duty applications including dump trucks, tow and recovery, and aerial equipment. It uses wire/cable mechanical shifting and accepts a 1-1/4" round output shaft with keyway. Intermittent torque rating is 250 lb-ft (339 Nm); verify your application on the Chelsea application pages for confirmed torque values. Shaft power output reaches 48 HP at 1,000 RPM. Compatible transmission manufacturers include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. Greaseable pump shafts help reduce spline fretting and corrosion over the unit's service life. Call us to confirm proper fit for your application.
The 221 Series uses a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing performance. The series supports continuous operation with a 30% de-rating. Output options include SAE A, SAE B, and SAE C pump flanges in addition to round and tapered shaft configurations across the broader 221 Series lineup. Three internal speed ratios are available within the series. Suited for aerial, vocational, municipal, tow and recovery, and dump truck applications.
Features
6-bolt mounting type for broad transmission compatibility
Wire/cable mechanical shift engagement
1-1/4" round output shaft with keyway
Intermittent torque range: 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 configurations
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
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
- Shaft Power: 24 HP (500 RPM), 48 HP (1,000 RPM) / 18 kW (500 RPM), 36 kW (1,000 RPM)
- Dimensions (H x W x L): 8.38" x 10.38" x 14.25"
Additional Information
The 221 Series uses a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing performance. The series supports continuous operation with a 30% de-rating. Output options include SAE A, SAE B, and SAE C pump flanges in addition to round and tapered shaft configurations across the broader 221 Series lineup. Three internal speed ratios are available within the series. Suited for aerial, vocational, municipal, tow and recovery, and dump truck applications.
