The Chelsea 221 Series Power Take-Off, part number 221XCAJP-X3XK or 221XCAJPX3XK, is a 6-bolt mounted PTO built for low-speed, heavy-duty applications such as dump trucks, tow and recovery, and aerial equipment. Shift type is wire/cable mechanical. The 1-1/4" round output shaft with keyway delivers up to 250 lb-ft (339 Nm) intermittent torque, with shaft power rated at 24 HP at 500 RPM and 48 HP at 1,000 RPM. Compatible transmission manufacturers include Allison, Eaton/Fuller, Volvo/Mack, Hino, and others. Cast iron housing with tapered cone output bearings provides greater load-bearing capability than needle-bearing designs. Greaseable pump shafts help reduce spline fretting and corrosion. Call us to confirm the correct fit for your application.
The 221 Series features a cast iron housing and tapered cone output bearings for long service life in demanding vocational cycles. The low-profile housing option is available where underhood clearance is limited. The series supports continuous operation with a 30% torque de-rating applied. Twenty-six output configurations are available across the 221 Series family, including Chelsea's 360-degree rotatable flange. Typical applications include dump trucks, tow and recovery rigs, and aerial equipment. Note: Parker Chelsea lists the 221 Series as obsolete; contact Pro Gear and Transmission to confirm current availability and to verify fit for your specific transmission.
Features
6-bolt mounting configuration
Wire/cable mechanical shift type
1-1/4" round output shaft with keyway
Intermittent torque up to 250 lb-ft (339 Nm); verify rating on application pages
Shaft power: 24 HP at 500 RPM, 48 HP at 1,000 RPM
Greaseable pump shafts to reduce spline fretting and corrosion
Fits Allison, Eaton/Fuller, Volvo/Mack, Hino, and other transmission manufacturers
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 keyway
- 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)
- Dimensions (H x W x L): 8.38" x 10.38" x 14.25"
Additional Information
The 221 Series features a cast iron housing and tapered cone output bearings for long service life in demanding vocational cycles. The low-profile housing option is available where underhood clearance is limited. The series supports continuous operation with a 30% torque de-rating applied. Twenty-six output configurations are available across the 221 Series family, including Chelsea's 360-degree rotatable flange. Typical applications include dump trucks, tow and recovery rigs, and aerial equipment. Note: Parker Chelsea lists the 221 Series as obsolete; contact Pro Gear and Transmission to confirm current availability and to verify fit for your specific transmission.
Parts Manual: Chelsea 221 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
