The Chelsea 272 Series Power Take-Off Assembly, part number 272XAAJP-G5XD or 272XAAJPG5XD, is a 6-bolt hot-shift PTO designed for medium-duty truck applications across towing and recovery, aerial, construction, and water truck markets. It mounts to transmissions from Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM, among others. The output shaft is a 1-1/4" round with a 5/16" key. Shift is pneumatic or PowerShift (pneumatic/hydraulic), and the unit includes an integral air control valve. The 272 Series carries a continuous torque rating up to 300 lb-ft (407 Nm); intermittent torque is rated at 201-300 lb-ft (401-500 Nm). Output power exceeds 56 HP (41-50 kW). Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting configuration compatible with multiple transmission brands including Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM
1-1/4" round output shaft with 5/16" key for direct driveshaft or pump connections
Pneumatic or PowerShift (pneumatic/hydraulic) shift operation with integral air control valve
Continuous torque rating up to 300 lb-ft (407 Nm); intermittent torque 201-300 lb-ft (401-500 Nm)
Output power 56+ HP (41-50 kW); shaft power rated at 57 HP / 43 kW at 1,000 RPM
Rotatable flanges and optional Wet-Spline technology for extended PTO and pump shaft service life
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: Up to 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)
- Shift Type: Pneumatic or PowerShift (Pneumatic/Hydraulic)
- 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 applications
Additional Information
The Chelsea 272 Series consolidates and replaces earlier Chelsea medium-duty PTO lines including the 230, 231, 236, 238, 270, and 271 Series. The 272 offers nine speed ratios and eighteen shift options in a single platform. The Smart-Start feature supports high-torque start-up conditions on driveshaft output configurations. Wet-Spline technology is available on direct-mount configurations to extend PTO and pump shaft service life. Common market applications include aerial work platforms, towing and recovery, construction equipment, and water trucks. Part number 272XAAJP-G5XD is also referenced as SP272XAAJP-G5XD in some catalog listings.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
