The Chelsea 272RCKUP-B3RE or 272RCKUPB3RE is a 6-bolt hot-shift power take-off assembly from the Chelsea 272 Series. It mounts to transmissions from Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM platforms, and shifts via pneumatic or hydraulic (PowerShift) actuation with an integral air control valve included. The output is a 1-1/4" round shaft with a 5/16" key. Intermittent torque capacity runs 201-300 lb-ft (401-500 Nm); continuous torque is rated at 300 lb-ft (407 Nm) - verify actual ratings on the Chelsea application pages for your specific installation. Shaft power output reaches 57 HP (43 kW) at 1,000 RPM. The 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 Series into one platform, serving aerial, towing and recovery, construction, and water truck applications. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting configuration for broad transmission compatibility
Pneumatic or hydraulic (PowerShift) shift with integral air control valve included
1-1/4" round output shaft 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 ratings
Shaft power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
Compatible transmission manufacturers: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and other platforms
Smart Start option available for high-torque start-up conditions; Wet-Spline option available for extended PTO and pump shaft life
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: 300 lb-ft (407 Nm) - check application pages for actual ratings
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic or Hydraulic (PowerShift); integral air control valve included
- Output Shaft Type: 1-1/4" round with 5/16" key
- 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 Transmission Manufacturers: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and other platforms
Additional Information
The Chelsea 272 Series consolidates six earlier PTO series - the 230, 231, 236, 238, 270, and 271 - into a single medium-duty hot-shift platform. The series offers nine speed ratios and eighteen shift options, with rotatable flanges for installation flexibility. Direct-mount outputs are available with optional Wet-Spline technology for extended component life. Driveshaft outputs can be equipped with the Smart Start feature to handle high-torque engagement conditions. Typical markets include aerial, towing and recovery, construction equipment, and water trucks. For application-specific torque ratings and transmission fitment details, consult the Chelsea 272 Series application pages or call Pro Gear and Transmission.Parts manual and diagrams: Chelsea 272 Series PTO parts list with prices
