The Chelsea PTO Assembly 272ACKUP-G5RY or 272ACKUPG5RY is a 6-bolt power take-off unit with a 1-1/4" round output shaft keyed with a 5/16" key. It carries a continuous torque rating of 300 lb-ft (407 Nm) and an intermittent torque rating in the 201-300 lb-ft range. Shift actuation is pneumatic or PowerShift (pneumatic/hydraulic). Output power reaches 56+ HP, with shaft power measured at 57 HP at 1,000 RPM and 29 HP at 500 RPM. The 24/47 gear ratio and broad transmission compatibility, covering Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM applications, make this unit a versatile fit across multiple vocational truck platforms. Call us to confirm proper fit for your specific transmission and application.
Features
6-bolt mounting configuration
1-1/4" round output shaft with 5/16" key
Pneumatic and PowerShift (pneumatic/hydraulic) shift types supported
Continuous torque: 300 lb-ft (407 Nm); intermittent torque: 201-300 lb-ft (401-500 Nm)
Output power: 56+ HP; shaft power at 1,000 RPM: 57 HP (43 kW)
Compatible with Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM transmissions
Tech Specs
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Shift Type: Pneumatic / PowerShift (Pneumatic/Hydraulic)
- Gear Ratio: 24/47
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: 300 lb-ft (407 Nm), see application pages for actual torque ratings
- 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
Additional Information
Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
