The Chelsea 272 Series Power Take-Off Assembly, part number 272XAAJP-A3RK or 272XAAJPA3RK, is a 6-bolt hot-shift PTO designed for medium-duty applications in towing and recovery, aerial, construction, and water truck work. It features a 1-1/4" round output shaft with a 5/16" key and supports both pneumatic and PowerShift (pneumatic/hydraulic) engagement. Continuous torque capability reaches 300 lb-ft (407 Nm), with intermittent ratings from 201 to 300 lb-ft (401-500 Nm). Output power covers 56+ HP (41-50 kW), and shaft power is rated at 57 HP at 1,000 RPM. The 272 Series consolidates several earlier Chelsea PTO lines into one platform and includes an integral air control valve. Call us to confirm proper fit for your transmission application.
Features
6-bolt mounting for broad transmission compatibility across Ford, Allison, Eaton/Fuller, Volvo/Mack, Aisin, RAM, and other platforms
1-1/4" round output shaft with 5/16" key
Pneumatic and PowerShift (pneumatic/hydraulic) shift options
Continuous torque rating: 300 lb-ft (407 Nm); intermittent: 201-300 lb-ft (401-500 Nm)
Shaft power: 57 HP at 1,000 RPM (43 kW)
Integral air control valve included; rotatable flanges for flexible installation
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 with 5/16" Key
- Output Power: 56+ HP (41-50 kW)
- Shift Type: Pneumatic, PowerShift (Pneumatic/Hydraulic)
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Transmission Compatibility: Ford, Allison, Eaton/Fuller, Volvo/Mack, Aisin, RAM, and other manufacturers
Additional Information
The Chelsea 272 Series consolidates several earlier Chelsea PTO families - including the 230, 231, 236, 238, 270, and 271 series - into a single medium-duty hot-shift platform. The 272 Series offers 9 speed ratios and 18 shift options. Direct-mount outputs include an optional Wet-Spline design for extended PTO and pump shaft service life. Driveshaft output configurations include the Smart-Start option, which handles high-torque start-up conditions. The integral air control valve is included with the assembly. Rotatable flanges allow flexible positioning to suit installation requirements. Typical application markets include aerial work, construction equipment, towing and recovery, and water trucks.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
