The Chelsea 272 Series Power Take-Off Assembly, part number 272GBAJX-P3XD or 272GBAJXP3XD, is a 6-bolt hot-shift PTO designed for medium-duty applications in towing and recovery, aerial, construction, and water truck markets. It features a 1-1/4" round output shaft with a 5/16" key and ships with an integral air control valve for pneumatic or 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). Output power exceeds 56 HP (41-50 kW), with shaft power measured at 29 HP at 500 RPM and 57 HP at 1,000 RPM. The 272 Series consolidates multiple prior Chelsea medium-duty PTO lines into one flexible platform. Call us to confirm proper fit for your transmission and application.
Features
6-Bolt mounting for compatibility across a wide range of medium-duty transmission applications
1-1/4" round output shaft with 5/16" key
Pneumatic and PowerShift (pneumatic/hydraulic) shift options 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 exceeds 56 HP (41-50 kW); shaft power 29 HP at 500 RPM, 57 HP at 1,000 RPM
Compatible transmission manufacturers include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM
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)
- Shift Type: Pneumatic, PowerShift (Pneumatic/Hydraulic)
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Compatible Transmissions: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, Other
Additional Information
The Chelsea 272 Series consolidates several prior medium-duty hot-shift PTO lines including the 230, 231, 236, 238, 270, and 271 Series into a single platform. The series offers nine speed ratios and eighteen shift options. Rotatable flanges allow flexible installation orientation. The Wet-Spline option (where applicable) extends PTO and pump shaft service life. Smart-Start capability is available for high-torque start-up conditions. Typical markets served include aerial work platforms, construction equipment, towing and recovery, water trucks, material handling, and defense applications.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
