Ford 6640 PTO problems...

[beahanj]

I have a Ford 6640 four wheel drive tractor that the PTO stopped working. It seems the switch works, and the module tested bad so I replaced it. It still won't come on. I have the large three ring binders, but I do not find in them where the solenoid is. Does anyone know where that is located?

 

[Harry in Ky]

The solenoid is part of the pto valve, which is part of the pto clutch assembly. All this is internal, with only the two wires visible from the outside. If the binder you mentioned is a service manual, there should be a section toward the back covering the pto, mechanical and electric.