The Chelsea 272 Series Power Take-Off Assembly, part number 272GKAJX-A3BD or 272GKAJXA3BD, is a 6-bolt hot-shift PTO designed for medium-duty applications including towing and recovery, aerial, construction equipment, and water trucks. It features a 1-1/4" round output shaft with a 5/16" key and shifts via pneumatic or PowerShift (pneumatic/hydraulic) actuation, with an integral air control valve included. Continuous torque capability reaches 300 lb-ft (407 Nm), with intermittent torque rated at 201-300 lb-ft (401-500 Nm). Output power exceeds 56 HP (41-50 kW). Compatible transmissions include Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM applications. The 272 Series consolidates earlier Chelsea medium-duty PTO lines into one flexible platform. 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)
Output power rated at 56+ HP (41-50 kW)
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
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic or PowerShift (Pneumatic/Hydraulic)
- Output Power: 56+ HP (41-50 kW)
- Shaft Power at 500 RPM: 29 HP (21 kW); at 1000 RPM: 57 HP (43 kW)
- Compatible Transmissions: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, Other
Additional Information
The Chelsea 272 Series consolidates several earlier medium-duty Chelsea PTO lines - including the 230, 231, 236, 238, 270, and 271 Series - into a single, flexible platform. The series offers nine speed ratios and eighteen shift options. Optional Wet-Spline technology is available on direct-mount configurations to extend PTO and pump shaft service life. Driveshaft output configurations can include the Smart-Start feature, designed for high-torque start-up conditions. Rotatable flanges allow flexible installation orientation. The 272 Series is suited for aerial, construction equipment, water truck, towing and recovery, defense, and material handling applications.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
