The Chelsea 221XEAKP-M3XY or 221XEAKPM3XY is a power take-off unit from the Chelsea 221 Series, a heavy-duty PTO line built around a cast iron housing with tapered cone output bearings for sustained load capacity. The 221 Series uses a 6-bolt mounting configuration and is compatible with transmissions from Allison, Eaton/Fuller, Volvo/Mack, and other manufacturers. Output options across the series include SAE A, SAE B, ISO 7652 pump flanges, and driveline configurations. The series is rated for an intermittent torque of 250 lb-ft (339 Nm), with continuous operation available at a 30% de-rating. Common applications include dump trucks, tow and recovery, and aerial equipment. Contact Pro Gear and Transmission to confirm this part number fits your specific transmission and application.
Features
Chelsea 221 Series power take-off, part number 221XEAKP-M3XY or 221XEAKPM3XY
6-bolt mounting configuration
Cast iron housing with tapered cone output bearings
Intermittent torque rating: 250 lb-ft (339 Nm); continuous operation with 30% de-rating
Compatible transmission manufacturers include Allison, Eaton/Fuller, Volvo/Mack, and others
Typical applications: dump trucks, tow and recovery, aerial and vocational equipment
Tech Specs
- Mounting Type: 6-Bolt
- Housing Material: Cast Iron
- Output Shaft Bearing Type: Tapered Cone
- Intermittent Torque Rating: 250 lb-ft (339 Nm)
- Continuous Operation: Yes, with 30% de-rating
- Output Options (Series): SAE A Pump Flange, SAE B Pump Flange, ISO 7652 Pump Flange, Driveline
- Output Power (Series): 46-55 HP / 31-40 kW
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, Other
- Shift Type (Series): Wire/Cable, Mechanical
- Series Status: Obsolete (Parker Chelsea 221 Series no longer available as a current product line)
Additional Information
The Chelsea 221 Series PTO was designed for low-speed, heavy-duty vocational applications including dump trucks, tow and recovery vehicles, and aerial equipment. The series offered three internal speed ratios and eleven shift options across its model range, along with a self-lube option for transmissions with limited PTO lubrication. An available low-profile housing variant provided additional clearance in tight installations, and greaseable pump shafts helped reduce spline fretting and corrosion. Parker Chelsea has listed the 221 Series as obsolete. If you need to confirm whether part number 221XEAKP-M3XY is the right unit for your truck or if you are sourcing a replacement, call Pro Gear and Transmission and we will help you identify the correct part.Parts Manual: Chelsea 221 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
