The Chelsea 272HSLLP-B8RS or 272HSLLPB8RS is a 272 Series Hot Shift Power Take-Off built for medium-duty truck applications. It mounts via a 6-bolt pattern and shifts pneumatically (air shift), with PowerShift pneumatic/hydraulic capability also supported. The output shaft is a 1-1/4" round shaft with a 5/16" key. Continuous torque capacity reaches 300 lb-ft (407 Nm), with intermittent torque rated at 201-300 lb-ft (401-500 Nm). Compatible transmissions span a wide range including Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM applications. The 272 Series consolidates several earlier Chelsea medium-duty PTO series into one platform, offering nine speed ratios and eighteen shift options. Available from Pro Gear and Transmission. Call us to confirm the correct fit for your specific transmission.
Features
6-bolt mounting pattern for broad transmission compatibility
Pneumatic (air shift) and PowerShift pneumatic/hydraulic shift options
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); shaft power 57 HP at 1,000 RPM
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 shaft with 5/16" key
- Output Power: 56+ HP (41-50 kW)
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1,000 RPM
- Shift Type: Pneumatic (air shift); PowerShift pneumatic/hydraulic
- Compatible Transmissions: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and other applications
Additional Information
The Chelsea 272 Series consolidates earlier medium-duty Chelsea PTO lines - including the 230, 231, 236, 238, 270, and 271 Series - into a single 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 for high-torque start-up conditions. The integral air control valve is included. Typical application markets include towing and recovery, aerial work, construction equipment, and water trucks.Parts Manual: Chelsea 272 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
