Pto on Allison transmission

Drive gear meshes and runs all the time. Has to have clearance just like a manual. The newer ones have a clutch pack applied by pressure from the transmission. That is controlled by a solenoid and an electric switch on the dash. They are expensive.. I thank directions come with the PTO.
Older ones are manual cable shift.
Should be information from Muncie and Chelsea PTO's on line.
Need to know trans model and desired PTO speed. Call your PTO dealer.

 

I wish my memory was better. I put one on a 3000 in a 4700, it only works in neutral. Check and see if you are getting power on 43 or if it's completing the ground when in neutral. I have a switch on the dash and I think it needs a ground from the tcm.

 

Is the PTO activated by the factory dash switches?
Is the solenoid that controls the PTO on the PTO or separate?

 

On mine we needed to add a switch. Our solenoid is on the pto. I forget where we got our information it was years ago. I would go ask the dealer. Our local dealer has always been really helpful with stuff like this.

 

Is the solenoid getting power with the switch on?

 

I would have to check but I believe so. I can go look at it later today and send you more information.

 

I went and looked here are some pictures. Solenoid is seperate. The power goes from the switch to the solenoid and back to the switch

 

Is there power at the exposed terminals at the solenoid with the PTO switch on?