The Chelsea 272XMAJX-P5RF or 272XMAJXP5RF is a 272 Series Hot Shift Power Take-Off assembly built on a 6-bolt mounting pattern. It features a 1-1/4" round output shaft with a 5/16" key and supports both pneumatic and PowerShift (pneumatic/hydraulic) engagement. Continuous torque capability 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), with shaft power of 29 HP at 500 RPM and 57 HP at 1,000 RPM. The 272 Series consolidates multiple earlier Chelsea PTO lines and carries pressure lube designation per the P suffix. Compatible transmissions span Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM applications. Call us to confirm proper fit for your specific transmission and application.
Features
6-bolt mounting pattern 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)
Pressure lube configuration (P designation)
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: 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: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Lubrication: Pressure Lube
- Compatible Transmissions: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM
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 18 shift options. Direct-mount configurations are available with optional Wet-Spline technology to extend PTO and pump shaft service life. Driveshaft output configurations include Smart Start for high-torque start-up conditions. Rotatable flanges allow flexible installation positioning. The 272 Series is suited for towing and recovery, aerial lift, construction equipment, and water truck applications.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
