The Chelsea 272XAAJP-A5RK is a 6-bolt medium-duty hot shift power take-off assembly from the Chelsea 272 Series. It features a 1-1/4" round output shaft with a 5/16" key and supports pneumatic or PowerShift (pneumatic/hydraulic) engagement. Continuous torque capability reaches 300 lb-ft (407 Nm), with intermittent torque rated at 201-300 lb-ft (401-500 Nm). Shaft power output is 29 HP at 500 RPM and 57 HP at 1,000 RPM. This unit is designed to fit transmissions from multiple manufacturers including Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM. Common applications include towing and recovery, aerial work, construction equipment, and water trucks. Call us to confirm proper fit for your application.
Features
6-bolt mounting configuration for broad transmission compatibility
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 up to 300 lb-ft (407 Nm); intermittent torque 201-300 lb-ft (401-500 Nm)
Shaft power: 29 HP at 500 RPM, 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
- Continuous Torque: 300 lb-ft / 407 Nm (check application pages for actual torque ratings)
- Intermittent Torque: 201-300 lb-ft / 401-500 Nm
- Output Power: 56+ HP / 41-50 kW
- Shaft Power at 500 RPM: 29 HP / 21 kW
- Shaft Power at 1,000 RPM: 57 HP / 43 kW
- Transmission Compatibility: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, Other
- Part Number: 272XAAJP-A5RK or 272XAAJPA5RK
Additional Information
The Chelsea 272 Series consolidates several earlier medium-duty hot shift PTO lines, including the 230, 231, 236, 238, 270, and 271, into a single platform. The series offers nine speed ratios and eighteen shift options. The rotatable flange design and direct-mount or driveshaft output configurations make this unit adaptable across towing and recovery, aerial, construction, and water truck applications. The Smart Start option, available within the 272 Series, is engineered for high-torque start-up conditions. Wet-Spline technology is offered on direct-mount configurations for extended PTO and pump shaft service life.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
