The Chelsea 272ADKUP-B5SD or 272ADKUPB5SD is a 272 Series hot shift power take-off assembly with a 6-bolt mounting configuration. It features a 1-1/4" round output shaft with a 5/16" key and a pneumatic (air) shift with PowerShift pneumatic/hydraulic operation. Intermittent torque rating runs 201-300 lb-ft (401-500 Nm), with continuous torque capability up to 300 lb-ft (407 Nm, de-rated per application). At 1,000 RPM the shaft delivers 57 HP (43 kW); output power reaches 56+ HP (41-50 kW). Compatible transmission manufacturers include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM, among others. The 272 Series consolidates several earlier Chelsea medium-duty hot shift platforms into one versatile unit, serving aerial, construction, towing and recovery, and water truck applications. Call us to confirm proper fit for your specific transmission and application.
Features
6-bolt mounting for broad transmission compatibility across Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM platforms
Pneumatic (air) shift and PowerShift pneumatic/hydraulic shift operation with integral air control valve
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, check application pages for actual ratings)
Shaft power output: 29 HP (21 kW) at 500 RPM, 57 HP (43 kW) at 1,000 RPM
Suited for aerial, construction equipment, towing and recovery, and water truck service
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic (Air Shift), PowerShift (Pneumatic/Hydraulic)
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: 300 lb-ft / 407 Nm (check 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
- Compatible Transmissions: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and other manufacturers
Additional Information
Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
