The Chelsea 272 Series Power Take-Off Assembly, part number 272XBAJP-A5XD or 272XBAJPA5XD, is a 6-bolt hot-shift PTO engineered for medium-duty work trucks. It features a 1-1/4" round output shaft with a 5/16" key and supports both pneumatic and PowerShift (pneumatic/hydraulic) engagement. Continuous torque capability reaches 300 lb-ft (407 Nm); intermittent torque is rated at 201-300 lb-ft (401-500 Nm). Shaft power output runs 29 HP at 500 RPM and 57 HP at 1,000 RPM. The 272 Series consolidates multiple prior Chelsea medium-duty PTO lines and is compatible with transmissions from Allison, Eaton/Fuller, Volvo/Mack, Ford, Aisin, RAM, and other manufacturers. Call us to confirm proper fit for your specific transmission and application.
Features
6-bolt mounting for medium-duty truck applications
Pneumatic and PowerShift (pneumatic/hydraulic) shift options with integral air control valve
1-1/4" round output shaft with 5/16" key
Continuous torque rating: 300 lb-ft (407 Nm); intermittent: 201-300 lb-ft (401-500 Nm)
Shaft power: 29 HP at 500 RPM, 57 HP at 1,000 RPM (56+ HP / 41-50 kW output rating)
Compatible with Allison, Eaton/Fuller, Volvo/Mack, Ford, Aisin, and RAM transmissions
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 or PowerShift (Pneumatic/Hydraulic)
- Compatible Transmission Manufacturers: Allison, Eaton/Fuller, Volvo/Mack, Ford, Aisin, RAM, Other
Additional Information
The 272 Series consolidates the Chelsea 230, 231, 236, 238, 270, and 271 medium-duty PTO lines into a single versatile platform. It offers nine speed ratios and eighteen shift options, covering the most common direct-mount and driveshaft output configurations. The direct-mount options include an optional Wet-Spline design for extended PTO and pump shaft service life. Driveshaft output configurations are available with Smart-Start for high-torque engagement conditions. Common markets served include towing and recovery, aerial work platforms, construction equipment, and water trucks. Rotatable flanges allow flexible installation positioning.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
