POWER TAKE-OFF (PTO)
Peterbilt Motors Company 8-3
TRANSMISSION MOUNTED PTO – 579 FAMILY
This application guide indicates if a PTO has sufficient clearance to truck components in various mounting configurations.
A green "ok" indicates that there is sufficient clearance to other truck components. A red "x" indicates that there minimal
or no clearance and the application is not recommended. The truck components investigated in this guide include frame
rails, Set Back Front Axle (SBFA) rear shackle, SBFA Front Air Suspension (FAS) rear shackle, over-bell frame brace,
coolant return manifold, transmission clutch actuator, and exhaust system components.
Usage Notes:
1) This application guide is only applicable to 579/567 trucks.
2) Only the specified PTO configurations have been analyzed.
3) Horizontal crossover exhaust limits access behind PTO's for shaft drives and other PTO attachments.
4) Eaton FR transmissions require the use of a 30° adapter when installing Chelsea or Muncie transmission
PTO's in the right hand position.
5) Eaton RT & Ultrashift Plus transmissions require the use of a 49° adapter when installing Chelsea
transmission PTO’s in the right hand position.
6) Eaton RT & Ultrashift Plus transmissions require the use of a 55° adapter when installing Muncie
transmission PTO’s in the right hand position.
7) Eaton transmissions require the use of a 6 to 8 Bolt adapter when installing a 6 bolt PTO in the bottom
position.
PTO CONTROLS
The 579/567 models have been designed to use electric in-dash switches to control air solenoids which
engage/disengage transmission PTOs. This system allows for increased control and interlock opportunities. This also
keeps air lines for transmission PTO controls from routing inside the cab. In cab air valve actuators for transmission PTO
control are still available and are located on the cab floor on the LH side of the driver’s seat. Air valve style transmission
PTO actuators should not be installed on the dash due to the difficulty of air-line routing. Customer installed transmission
PTO controls for use with customer installed transmission PTO's include a chassis and dash harness pre-wire to ease the
installation of in-dash transmission PTO controls at the body builder. It is strongly recommended that the truck be coded
for this if transmission PTO(s) could be installed after initial in-service date.
