The Chelsea 221XCAKP-M4XK or 221XCAKPM4XK is a 6-bolt Power Take-Off assembly from the 221 Series, 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 with key delivers up to 250 lb-ft intermittent torque (339 Nm), with shaft power rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. Compatible transmissions include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. The cast iron housing is available in standard or special low-profile configurations. Call us to confirm proper fit for your specific transmission and application.
The Chelsea 221 Series PTO uses a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing capability under heavy-duty cycling. The 221 Series offers three internal speed ratios and a 360-degree rotatable flange option, making it adaptable across a wide range of vocational truck installations. Typical markets include aerial, dump truck, and tow and recovery equipment. The self-lube option addresses transmissions that have difficulty delivering lubrication to the PTO mounting pad.
Features
6-bolt mounting for Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmission applications
Wire/cable mechanical shift operation
1-1/4" round output shaft with keyway
Intermittent torque rating up to 250 lb-ft (339 Nm); check application pages for actual ratings
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 configuration
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
- Transmission Compatibility: 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)
- Continuous Operation: Yes, with 30% de-rating
Additional Information
The Chelsea 221 Series PTO uses a cast iron housing with tapered cone bearings on the output shaft for strong load-bearing capability under heavy-duty cycling. The 221 Series offers three internal speed ratios and a 360-degree rotatable flange option, making it adaptable across a wide range of vocational truck installations. Typical markets include aerial, dump truck, and tow and recovery equipment. The self-lube option addresses transmissions that have difficulty delivering lubrication to the PTO mounting pad.
