The Chelsea 272 Series Power Take-Off Assembly, part number 272XSESX-A5RK or 272XSESXA5RK, is a medium-duty hot-shift PTO built on a 6-bolt mounting pattern. Output is through a 1-1/4" round shaft with a 5/16" key. Shift actuation is pneumatic (PowerShift), and the unit carries an intermittent torque rating of 201-300 lb-ft (401-500 Nm). Continuous torque reaches 300 lb-ft (407 Nm) - verify actual rating against the application page for your specific installation. Compatible transmission families include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM platforms. Call Pro Gear and Transmission to confirm proper fit for your truck and transmission.
Features
6-bolt mounting pattern for broad transmission compatibility
Pneumatic (PowerShift) hot-shift engagement - no need to stop or declutch
1-1/4" round output shaft with 5/16" key
Intermittent torque: 201-300 lb-ft (401-500 Nm); continuous torque up to 300 lb-ft (407 Nm) - confirm via application page
Output power: 56+ HP (41-50 kW); shaft power at 1,000 RPM: 57 HP / 43 kW
Compatible with Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM transmissions
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: 300 lb-ft / 407 Nm (check application pages for actual torque ratings)
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" round shaft with 5/16" key
- Shift Type: Pneumatic / PowerShift (Pneumatic-Hydraulic)
- Output Power: 56+ HP (41-50 kW)
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Compatible Transmissions: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM
Additional Information
The Chelsea 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 Series into a single medium-duty hot-shift platform. The series offers nine speed ratios and eighteen shift options. The integral air control valve is built into the unit. Wet-Spline technology (optional on select configurations) extends PTO and pump shaft service life. The Smart-Start feature is available for high-torque start-up conditions. Typical markets include towing and recovery, aerial work platforms, construction equipment, and water trucks. Parker Chelsea documents for the 272 Series include the 272 Series Parts List (HY25-2272-M1_US) and the 272/282/852/885 Series Owner's Manual.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
