The Chelsea 272RAKUP-G3RK or 272RAKUPG3RK is a 272 Series hot shift power take-off built for medium-duty applications including aerial, towing and recovery, construction equipment, and water trucks. It mounts via a 6-bolt pattern and shifts pneumatically (PowerShift pneumatic/hydraulic). The output shaft is a 1-1/4" round shaft with a 5/16" key. Continuous torque capability for the 272 Series reaches 300 lb-ft (407 Nm); intermittent torque is rated at 201-300 lb-ft (401-500 Nm). The 272 Series consolidates several earlier Chelsea PTO lines into one versatile platform, offering nine speed ratios and an integral air control valve. Call us to confirm the right ratio and shift configuration for your transmission.
Features
6-bolt mounting pattern for broad transmission compatibility including Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, and RAM
Pneumatic (air) shift with integral air control valve; PowerShift pneumatic/hydraulic capable
1-1/4" round output shaft with 5/16" key
Continuous torque rating up to 300 lb-ft (407 Nm) for the 272 Series; intermittent torque 201-300 lb-ft (401-500 Nm)
Shaft power output: 29 HP at 500 RPM, 57 HP at 1000 RPM
Smart Start option available for high-torque start-up conditions; rotatable flanges for flexible installation
Tech Specs
- Mounting Type: 6-Bolt
- Shift Type: Pneumatic, PowerShift (Pneumatic/Hydraulic)
- Output Shaft Type: 1-1/4" Round with 5/16" Key
- Continuous Torque: 300 lb-ft / 407 Nm (check application pages for actual torque ratings)
- Intermittent Torque: 201-300 lb-ft / 401-500 Nm
- Output Power: 56+ HP / 41-50 kW
- Shaft Power: 29 HP (21 kW) at 500 RPM; 57 HP (43 kW) at 1000 RPM
- Transmission Compatibility: Allison, Eaton/Fuller, Ford, Aisin, Volvo/Mack, RAM, and other manufacturers
- Dimensions (H x W x L): 15.75" x 12.5" x 14"
Additional Information
The Chelsea 272 Series consolidates the earlier 230, 231, 236, 238, 270, and 271 Series PTOs into a single medium-duty hot shift platform. The series offers nine speed ratios and eighteen shift options. Wet-Spline technology is available on direct-mount configurations for extended PTO and pump shaft service life. Smart Start is available for high-torque start-up applications. Common markets include aerial equipment, towing and recovery, construction, and water trucks. The 272RAKUP-G3RK is sold by Pro Gear and Transmission. Call us to confirm proper fitment for your transmission and application.Parts manual and diagrams: Chelsea 272 Series PTO parts list with prices
