The Chelsea 272 Series Power Take-Off Assembly, part number 272MDAJP-B5XD or 272MDAJPB5XD, is a 6-bolt hot-shift PTO built for medium-duty vocational applications including towing and recovery, aerial work, construction equipment, and water trucks. It mounts to transmissions from Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM platforms. The output shaft is a 1-1/4" round with a 5/16" keyway. Shift is pneumatic or PowerShift (pneumatic/hydraulic), and the unit comes with an integral air control valve. 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). Available from Pro Gear and Transmission. Call us to confirm proper fit for your transmission and application.
Features
6-Bolt mounting for compatibility with Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM transmissions
1-1/4" round output shaft with 5/16" keyway
Pneumatic or PowerShift (pneumatic/hydraulic) engagement
Integral air control valve included
Continuous torque rating up to 300 lb-ft (407 Nm); intermittent torque 201-300 lb-ft (401-500 Nm)
Suited for aerial, towing and recovery, construction, and water truck applications
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
- Output Power: 56+ HP (41-50 kW)
- Shift Type: Pneumatic, PowerShift (Pneumatic/Hydraulic)
- Transmission Compatibility: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and other manufacturers
- Shaft Power at 500 RPM: 29 HP (21 kW); at 1000 RPM: 57 HP (43 kW)
Additional Information
The Chelsea 272 Series consolidates several earlier Chelsea medium-duty PTO lines, including the 230, 231, 236, 238, 270, and 271 series, into a single versatile platform. The 272 Series offers nine speed ratios and 18 shift options. Direct-mount configurations are available with an optional Wet-Spline feature for extended PTO and pump shaft service life. Driveshaft output configurations include the Smart-Start option, designed to handle high-torque start-up conditions. Rotatable flanges allow flexible installation positioning. The series is documented under Parker Chelsea publications 272 Series Parts List HY25-2272-M1_US and the 272/282/852/885 Series Owner's Manual.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
