The Chelsea 272 Series Power Take-Off Assembly, part number 272MBAJP-J5RK or 272MBAJPJ5RK, is a 6-bolt hot shift PTO designed for medium-duty applications in towing and recovery, aerial, construction, and water truck service. 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 shaft with a 5/16" key. Shift type is pneumatic or PowerShift (pneumatic/hydraulic), and the unit includes an integral air control valve. Intermittent torque rating is 201-300 lb-ft (401-500 Nm); continuous torque is rated to 300 lb-ft (407 Nm) - verify actual torque rating for your specific application. Shaft power output reaches 57 HP at 1,000 RPM. Call us to confirm proper fit for your application.
Features
6-bolt mounting configuration for broad transmission compatibility
1-1/4" round output shaft with 5/16" key
Pneumatic or PowerShift (pneumatic/hydraulic) shift with integral air control valve
Intermittent torque rating: 201-300 lb-ft (401-500 Nm)
Continuous torque rating: up to 300 lb-ft (407 Nm) - check application pages for actual rating
Output power: 57 HP / 43 kW at 1,000 RPM
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: up to 300 lb-ft (407 Nm) - verify actual rating on application pages
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Shift Type: Pneumatic or PowerShift (Pneumatic/Hydraulic)
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Output Power: 56+ HP (41-50 kW)
- Compatible Transmission Manufacturers: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and others
Additional Information
The Chelsea 272 Series consolidates several earlier Chelsea medium-duty PTO lines into a single, more versatile platform. The series offers nine speed ratios and eighteen shift options, making it adaptable across a wide range of direct-mount and driveshaft output configurations. The 272 is used across aerial, construction equipment, towing and recovery, and water truck applications. The NMFC classification for this unit falls under hydraulic PTOs, pumps, and motors (NMFC 128520).Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
