The Chelsea 272 Series Power Take-Off Assembly, part number 272RBKUP-B3RK or 272RBKUPB3RK, is a 6-bolt hot-shift PTO designed for medium-duty applications including aerial work, construction equipment, towing and recovery, and water trucks. It features a 1-1/4" round output shaft with a 5/16" key and accepts either pneumatic (air) or PowerShift pneumatic/hydraulic engagement. Continuous torque capability reaches 300 lb-ft (407 Nm), with intermittent torque rated at 201-300 lb-ft (401-500 Nm). Output power exceeds 56 HP, with shaft power of 57 HP at 1,000 RPM. Compatible transmission families include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM. 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
1-1/4" round output shaft with 5/16" key
Pneumatic (air) or PowerShift pneumatic/hydraulic engagement
Continuous torque rating: 300 lb-ft (407 Nm); intermittent torque: 201-300 lb-ft (401-500 Nm)
Output power: 56+ HP (41-50 kW); shaft power reaches 57 HP at 1,000 RPM
Suited for aerial, construction, towing and recovery, and water truck markets
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)
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Shift Type: Pneumatic (Air Shift) or PowerShift (Pneumatic/Hydraulic)
- Transmission Compatibility: 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.
