The Chelsea 272 Series power take-off assembly, part number 272MKAJP-B5RK or 272MKAJPB5RK, is a 6-bolt hot shift PTO designed for medium-duty applications in towing and recovery, aerial, construction, and water truck work. It mounts via a 6-bolt pattern and delivers a 1-1/4" round output shaft with a 5/16" key. Shift actuation is pneumatic or PowerShift (pneumatic/hydraulic), with an integral air control valve included. Intermittent torque is rated at 201-300 lb-ft (401-500 Nm); continuous torque reaches 300 lb-ft (check application pages for actual torque ratings for your installation). Output power exceeds 56 HP (41-50 kW). Compatible transmission manufacturers include Ford, Aisin, Volvo/Mack, Allison, RAM, and Eaton/Fuller, among others. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting pattern for broad transmission compatibility
1-1/4" round output shaft with 5/16" keyway
Pneumatic or PowerShift (pneumatic/hydraulic) shift actuation with integral air control valve
Intermittent torque rating: 201-300 lb-ft (401-500 Nm); continuous torque up to 300 lb-ft (407 Nm)
Output power: 56+ HP (41-50 kW); shaft power at 1,000 RPM: 57 HP / 43 kW
Compatible with Ford, Aisin, Volvo/Mack, Allison, RAM, and Eaton/Fuller transmissions
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Mounting Type: 6-Bolt
- Output Shaft Type: 1-1/4" round shaft with 5/16" key
- Output Power: 56+ HP (41-50 kW)
- Shift Type: Pneumatic or PowerShift (Pneumatic/Hydraulic)
- Transmission Compatibility: Ford, Aisin, Volvo/Mack, Allison, RAM, Eaton/Fuller, and other manufacturers
- Continuous Torque: 300 lb-ft (407 Nm) - check application pages for actual torque ratings
- Shaft Power at 500 RPM: 29 HP (21 kW); at 1,000 RPM: 57 HP (43 kW)
Additional Information
Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
