The Chelsea 272ACKUP-B5RK or 272ACKUPB5RK is a power take-off assembly designed for a wide range of commercial truck transmission applications, including Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM platforms. It mounts via a 6-bolt pattern and uses a pneumatic or PowerShift (pneumatic/hydraulic) engagement. The 1-1/4" round output shaft accepts a 5/16" key. Continuous torque rating is 300 lb-ft (407 Nm) and intermittent torque falls in the 201-300 lb-ft (401-500 Nm) range. Shaft power output reaches 57 HP at 1,000 RPM. Call us to confirm proper fit for your specific transmission and application before ordering.
Features
6-bolt mounting pattern for broad transmission compatibility
Pneumatic and PowerShift (pneumatic/hydraulic) shift options
1-1/4" round output shaft with 5/16" key
Continuous torque rating: 300 lb-ft (407 Nm)
Intermittent torque rating: 201-300 lb-ft (401-500 Nm)
Compatible transmission brands include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic, PowerShift (Pneumatic/Hydraulic)
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Continuous Torque: 300 lb-ft / 407 Nm (check application pages for actual torque ratings)
- Intermittent Torque: 201-300 lb-ft / 401-500 Nm
- Output Power: 56+ HP / 41-50 kW
- Shaft Power at 500 RPM: 29 HP / 21 kW
- Shaft Power at 1,000 RPM: 57 HP / 43 kW
- Transmission Compatibility: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and other manufacturers
Additional Information
Parts manual and diagrams: Chelsea 272 Series PTO parts list with prices
