The Chelsea 221 Series Power Take-Off, part number 221ZLAHX-A3XK or 221ZLAHXA3XK, is a 6-bolt mounted PTO designed for low-speed, heavy-duty vocational applications including dump trucks, tow and recovery, and aerial equipment. It uses a wire/cable mechanical shift and features a 1-1/4" round output shaft with keyway. Intermittent torque rating reaches 250 lb-ft (339 Nm); consult application pages for your exact rating. Shaft power output is 24 HP at 500 RPM and 48 HP at 1,000 RPM. Compatible transmissions span Allison, Eaton/Fuller, Volvo/Mack, Hino, and other configurations. The cast iron housing is available in standard or low-profile form. Call us to confirm the right fit for your transmission and application.
The Chelsea 221 Series uses tapered cone output bearings in place of needle bearings, providing greater load-bearing capability for heavy-duty cycles. The cast iron housing is available in a standard or space-saving low-profile configuration. Twenty-six output options are offered across the series, including Chelsea's 360-degree rotatable flange. Three internal speed ratios and multiple shift options make this a versatile platform across tow and recovery, dump truck, aerial, and vocational municipal applications. Greaseable pump shafts are a standard feature to reduce spline fretting and corrosion over time.
Features
6-bolt mounting configuration compatible with Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmission manufacturers
Wire/cable mechanical shift type
1-1/4" round output shaft with keyway
Intermittent torque rating up to 250 lb-ft (339 Nm) - verify against application pages for your specific configuration
Shaft power: 24 HP (18 kW) at 500 RPM; 48 HP (36 kW) 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
- Output Shaft Type: 1-1/4" Round with Key
- Transmission Manufacturer: Allison, Eaton/Fuller, Volvo/Mack, Hino, Other
- Mounting Type: 6-Bolt
- 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 uses tapered cone output bearings in place of needle bearings, providing greater load-bearing capability for heavy-duty cycles. The cast iron housing is available in a standard or space-saving low-profile configuration. Twenty-six output options are offered across the series, including Chelsea's 360-degree rotatable flange. Three internal speed ratios and multiple shift options make this a versatile platform across tow and recovery, dump truck, aerial, and vocational municipal applications. Greaseable pump shafts are a standard feature to reduce spline fretting and corrosion over time.
