The Chelsea 272 Series Power Take-Off Assembly, part number 272MBAJP-B5XD or 272MBAJPB5XD, is a 6-bolt hot shift PTO built for medium-duty applications in towing and recovery, aerial, construction, and water truck markets. It mounts with a 6-bolt pattern and features a 1-1/4" round output shaft with a 5/16" key. Shift is pneumatic (PowerShift), and the unit includes an integral air control valve. Continuous torque capacity 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). The 272 Series is compatible with transmissions from Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM, among others. Call us to confirm proper fit for your specific transmission and application.
Features
Chelsea 272 Series 6-bolt hot shift PTO assembly
Pneumatic (PowerShift) shift with integral air control valve
1-1/4" round output shaft with 5/16" key
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 57 HP at 1,000 RPM
Compatible with Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM transmissions
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic / PowerShift (Pneumatic-Hydraulic)
- Output Shaft Type: 1-1/4" Round 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 Torque Ratings
- Output Power: 56+ HP (41-50 kW)
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Transmission Compatibility: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, Other
Additional Information
The Chelsea 272 Series consolidates several earlier medium-duty hot shift PTO lines including the 230, 231, 236, 238, 270, and 271 Series into a single versatile platform. The series offers nine speed ratios and eighteen shift options. Direct mount configurations are available with optional Wet-Spline technology for extended PTO and pump shaft service life. Driveshaft output configurations include the Smart-Start option, designed for high-torque start-up conditions where conventional PTOs may struggle. Rotatable flanges allow flexible installation orientation. Typical markets served include aerial work platforms, towing and recovery, construction equipment, and water trucks.Parts manual and diagrams: Chelsea 272 Series PTO parts list with prices
