The Chelsea 221 Series PTO Assembly, part number 221XEAHX-H3XK or 221XEAHXH3XK, is a 6-bolt mounted power take-off built for low-speed, heavy-duty applications including dump trucks, tow and recovery, and aerial equipment. It uses a wire/cable mechanical shift and delivers up to 250 lb-ft (339 Nm) intermittent torque, with output power in the 46-55 HP (31-40 kW) range. Shaft power is rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. The 1-1/4" round output shaft with keyway suits a broad range of hydraulic pump setups. A cast iron housing with tapered cone output bearings provides strong load-bearing capability. Compatible transmission manufacturers include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. Available in standard or low-profile housing configurations. Call us to confirm the right fit for your transmission and application.

• 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)

The 221 Series features a cast iron housing and tapered cone output bearings for strong load capacity in demanding low-speed duty cycles. The 360-degree rotatable flange option and twenty-six output configurations make this a flexible platform across aerial, dump truck, and tow-and-recovery applications. Three internal speed ratios are available within the series. A self-lube option is offered for transmissions with limited PTO lubrication. The low-profile housing variant maximizes clearance under the truck where space is restricted.