The Chelsea 221 Series Power Take-Off, part number 221ZEAHX-W4XD or 221ZEAHXW4XD, is a 6-bolt mounted PTO designed for low-speed, heavy-duty applications including dump trucks, tow and recovery, and aerial equipment. Shift type is wire/cable mechanical. The 1-1/4" round output shaft accepts a keyway, and the unit delivers up to 250 lb-ft intermittent torque (339 Nm). Shaft power ratings are 24 HP at 500 RPM and 48 HP at 1,000 RPM. Compatible transmission manufacturers include Allison, Eaton/Fuller, Volvo/Mack, and Hino, among others. Cast iron housing with tapered cone output bearings provides strong load-bearing capability. Greaseable pump shafts help reduce spline fretting and corrosion. Call us to confirm proper fit for your application.
The Chelsea 221 Series features a cast iron housing with tapered cone output bearings for strong load-bearing capability under demanding vocational cycles. Three internal speed ratios and multiple shift options make the 221 Series adaptable across a wide range of chassis configurations. Compatible output flange options in the 221 Series family include SAE A, SAE B, ISO 7652 pump flanges, and driveline configurations. Continuous operation is supported with a 30% de-rating applied. Suitable markets include aerial, dump truck, tow and recovery, and vocational or municipal equipment.
Features
6-bolt mounting type for broad transmission compatibility
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 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 (verify actual rating on Chelsea application pages)
- Shift Type: Wire/Cable, Mechanical
- Output Power: 46-55 HP / 31-40 kW
- Output Shaft Type: 1-1/4" Round with key
- Transmission Manufacturer Compatibility: 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)
Additional Information
The Chelsea 221 Series features a cast iron housing with tapered cone output bearings for strong load-bearing capability under demanding vocational cycles. Three internal speed ratios and multiple shift options make the 221 Series adaptable across a wide range of chassis configurations. Compatible output flange options in the 221 Series family include SAE A, SAE B, ISO 7652 pump flanges, and driveline configurations. Continuous operation is supported with a 30% de-rating applied. Suitable markets include aerial, dump truck, tow and recovery, and vocational or municipal equipment.
