Parker Chelsea 277 Series, Allison World Transmission
Power Take Off Units

Allison specifically chose Chelsea to join their engineers in developing PTOs for the Allison World Transmissions. The versatile 277 series Powershift exceeds the torque capacity of a 5-Bolt PTO while offering the tighter sealing of a 10-Bolt Pattern. WIT is a Parker Authorized Build Center and has three Parker Truck Hydraulic Centers that specialize in Parker PTOs. We can help you choose the right options and even install the PTO. Read more about our Build Centers and Truck Hydraulic Centers here.  See below for more features and benefits of the 277 Series PTO.

• Five speed ratios and eighteen output options including the popular 360 degree rotatable flange. 
• Features the SuperTorque™ option providing up to 20% more torque capacity than a standard 277 series
• Combo valve shift option available for PTO/Dump Pump system
  
• Cartridge Valve Assembly for reduced interference
• Wet Spline options available
  
• Shaft Brake option available for product pump applications
• Industry first rotatable wet spline
  

Attached to this document is the 277 Series Brochure HY25-0072-B1(.pdf) and a link to the 277/278 Parts List H25-2277-M1

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