The Chelsea 272MAAJP-K5RK or 272MAAJPK5RK is a 272 Series hot shift power take-off assembly with a 6-bolt mounting pattern. It uses a 1-1/4" round output shaft with a 5/16" key and supports pneumatic or PowerShift (pneumatic/hydraulic) engagement. The 272 Series is rated for intermittent torque of 201-300 lb-ft (401-500 Nm) and continuous torque up to 300 lb-ft (407 Nm) - check application pages for actual torque ratings at your specific installation. Shaft power output reaches 57 HP (43 kW) at 1,000 RPM. Compatible transmission manufacturers include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM. Call us to confirm proper fit for your application.
Features
6-bolt mounting pattern for broad transmission compatibility
Pneumatic or PowerShift (pneumatic/hydraulic) engagement with integral air control valve
1-1/4" round output shaft with 5/16" key
Intermittent torque rating: 201-300 lb-ft (401-500 Nm)
Continuous torque up to 300 lb-ft (407 Nm) - verify rating on application pages
Compatible with Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM transmissions
Tech Specs
- Intermittent Torque: 201-300 lb-ft (401-500 Nm)
- Continuous Torque: Up to 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
- Shift Type: Pneumatic / PowerShift (Pneumatic-Hydraulic)
- 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
Additional Information
The Chelsea 272 Series consolidates several earlier medium-duty hot shift PTO families - including the 230, 231, 236, 238, 270, and 271 series - into a single platform. The 272 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 startup conditions. The 272 Series is used across aerial, construction equipment, towing and recovery, and water truck applications. Part number 272MAAJP-K5RK is also referenced as SP272MAAJP-K5RK in some catalog sources.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
