The Chelsea 272XPAJX-A3XD or 272XPAJXA3XD is a 272 Series hot-shift power take-off assembly built on a 6-bolt mount. Output is through a 1-1/4" round shaft with a 5/16" key. Shift options include pneumatic (air) and PowerShift (pneumatic/hydraulic). The 272 Series carries an intermittent torque rating of 201-300 lb-ft (401-500 Nm) and a continuous torque rating of up to 300 lb-ft (407 Nm); verify actual torque values for your specific application. Output power reaches 56+ HP (41-50 kW), with shaft power measured at 29 HP (21 kW) at 500 RPM and 57 HP (43 kW) at 1,000 RPM. Compatible transmissions span a broad range, including Allison, Eaton/Fuller, Volvo/Mack, Aisin, Ford, and RAM. Call us to confirm proper fit for your application.
Features
6-bolt mounting configuration for broad transmission compatibility
1-1/4" round output shaft with 5/16" key
Pneumatic (air shift) and PowerShift (pneumatic/hydraulic) shift options
Intermittent torque: 201-300 lb-ft (401-500 Nm); continuous torque up to 300 lb-ft (407 Nm)
Output power: 56+ HP (41-50 kW); 57 HP at 1,000 RPM, 29 HP at 500 RPM
Compatible with Allison, Eaton/Fuller, Volvo/Mack, Aisin, Ford, and RAM transmissions
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: Up to 300 lb-ft / 407 Nm (verify actual rating on application pages)
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Output Power: 56+ HP (41-50 kW)
- Shift Type: Pneumatic (Air Shift); PowerShift (Pneumatic/Hydraulic)
- Shaft Power at 500 RPM: 29 HP (21 kW)
- Shaft Power at 1,000 RPM: 57 HP (43 kW)
- Compatible Transmissions: Allison, Eaton/Fuller, Volvo/Mack, Aisin, Ford, RAM, Other
Additional Information
The 272 Series consolidates and replaces several earlier Chelsea medium-duty hot-shift PTO families, including the 230, 231, 236, 238, 270, and 271 Series, into a single updated platform. The series offers nine speed ratios and eighteen shift configurations. Common application markets include towing and recovery, aerial equipment, construction equipment, and water trucks. The integral air control valve is included with the assembly. An optional wet-spline configuration is available within the series for extended PTO and pump shaft life, and a Smart-Start option addresses high-torque start-up conditions. Confirm which configuration this specific part number represents before ordering; call Pro Gear and Transmission if you need help matching the assembly to your transmission and application.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
