Auto header on John Deere 6620 w/ DAM not working

andy r

Member
It seems a little slow over on the Combine section yet. So, I will post my questions here as well. Anyway, it is that time of year to
make necessary combine repairs. Last fall I think I might have cut my beans relying primarily on the plastic skids under the head and the
lift provided by the compressed nitrogen tank. Worked well, just cut beans too low and got into the dirt once in a while. Probably not the
best for the life of the plastic skids. Combine is Dial-a-matic and head is just older style "header height". There is an adapter between
the header wiring and combine wiring. I need some trouble shooting ideas????????
I do know about pushing the little pins on ends of the hydraulic / solenoid valve. It does work - push the pin on the left header goes down
/ push the pin on the right header goes up. Manual header control lever in cab works as it should as well.

Can I hot wire with a jumper the solenoids one at a time to see if they work properly? Does the polarity need to be correct?

Can I test the combine wiring/controls at the plug by making electrical contact between certain pins in the plug?????? Anyone know what
each pin or color of wire does ????

Since the combine has Dial-a-matic, does the DAM knob in the cab have to be set on a certain setting ( 0, 1, 2, 3) for the older height
control system on the head work?

Can I add Dial-a-matic to my older style head? Older style head has the micro switches mounted up by the reel operated by the long rod.
Dial-a-matic box is mounted down by the sickle directly on the rod operated by the skid plates. Can the Dial-a-matic box be easily added to
this rod??

I might add that the hydraulic oil temperature light did come on a few times last fall. Probably takes at least an hour before it comes on.
Stop and it goes off and stays off for half and hour or better. These were warm days.

Any other ideas appreciated. Thanks.
 
I do not have any help for you but I am interested in what those who know have to say as I am having a similar Problem.
 
X2 ^^^

There is a chain that needs to be attached to a lever that works a switch under the cab. The switch turns the system off when the feederhouse is raised. If the chain is not hooked up the system will not turn on.

I have never worked on one with microswitches on the header, but would guess that you are correct that the dial needs to be set to a specific number to work. The
DAM box is just a series of 5 switches together.
 
I do believe that the switch under the cab with the chain that activates it is working. When you manually lower the head with the hydraulic lever the auto header control will take over and lower the head once it gets so far from the ground. I just don't think it works right (up/down) once it gets there.
 
One of the most common issues was rodent damage to the wiring harness where it goes through the upper frame on the back side of the head. Maybe start by looking there?
 

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