The Chelsea 272 Series Power Take-Off Assembly, part number 272XKAJX-V3RB or 272XKAJXV3RB, is a 6-bolt hot-shift PTO built around a 1-1/4" round output shaft with a 5/16" keyway. It shifts via pneumatic or PowerShift (pneumatic/hydraulic) actuation and comes with an integral air control valve. Continuous torque is rated up to 300 lb-ft (407 Nm); intermittent torque falls in the 201-300 lb-ft (401-500 Nm) range. Shaft power output is rated at 29 HP (21 kW) at 500 RPM and 57 HP (43 kW) at 1,000 RPM. Transmission compatibility covers Ford, Allison, Eaton/Fuller, Aisin, Volvo/Mack, and RAM applications, among others. The 272 Series consolidates several earlier Chelsea medium-duty hot-shift PTO lines into one platform and suits aerial, construction, towing and recovery, and water truck applications. Call us to confirm proper fit for your transmission and application.
Features
6-bolt mounting configuration with rotatable flanges for flexible installation
1-1/4" round output shaft with 5/16" keyway
Pneumatic or PowerShift (pneumatic/hydraulic) shift with integral air control valve
Continuous torque rating up to 300 lb-ft (407 Nm); intermittent rating 201-300 lb-ft (401-500 Nm)
Shaft output of 29 HP at 500 RPM, 57 HP at 1,000 RPM
Compatible with Ford, Allison, Eaton/Fuller, 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: Ford, Allison, Eaton/Fuller, Aisin, Volvo/Mack, RAM, Other
Additional Information
The Chelsea 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 PTO lines into a single medium-duty hot-shift platform. The series offers nine speed ratios and eighteen shift options. Direct-mount outputs 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 start-up conditions where shock loads are a concern. Typical market applications for the 272 Series include towing and recovery, aerial work platforms, construction equipment, and water trucks. Part number 272XKAJX-V3RB is also referenced as SP272XKAJX-V3RB. Call Pro Gear and Transmission to verify the correct configuration for your specific transmission and duty cycle.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
