Combines f3 with 313 auto header problems

Are your contact surfaces clean and the springs straightIJ I run emory cloth over them each year until they shine.

I tried to get the springs straight but may need to replace them, contacts are clean.

adjust so as All three springs are in line vertically with no bars touching. Then with the header up, unlocked, all linkgages bottomed out, with the feeler fingers just touching all across, adjust the turn buckle so as to make the back bar pull the springs forward about a 1_4". When the header lowers it will go into a'dead' zone. At this sime you will not be able to raise the head with the l-m-h knob in the cab. The theory is the bar touches or comes away from contack with the top spring first - high- the middle - mid second - and the lower last -low. To check this operation, take the throat chain off, take the turn buckle loose and start the machine and use a pencil to move the plastic back and forth to simulate field movement. Check on low , med , high to insure proper operation. Many times it is a broke wire, inside the harness, right where the throat pivots that is the culprit for erratic operation. This can be diagnosed by checking for voltage at the module for feed back of current from the low mid high wires.

I will give this a try, my manual shows that the turnbuckle should be in the top of the steel rockshaft lever and in the bottom of the plastic sensor. I have read the trouble shooting guide in the header manual and it says that I could loose a header height postion with the turnbuckle in the bottom sensor position.

New contact springs, adjusted according to tbran. folks thanks for your help the problem is solved and the header height works like new.