Gleaner M3 AHHC

centash · Jul 5, 2021

Getting my M3 ready for wheat harvest. When I engage the header, it automatically goes down, regardless of the position of the HHC switch. I can override it manually on the header height switch, but once I release it, the header goes fully down again. I disconnected all wiring to the header, and it still does it. Header raises and lowers normally when it is not engaged with the thresher running. Wiring issue?

Thanks, Ben

centash · Jul 7, 2021

Got it figured out. With the wiring diagram and some diagnosing, I figured the AHHC module was defective since power supplied to it goes through the header clutch switch. I disconnected it and re routed some wires since the shaft monitors are powered by the header clutch switch as well, and we are good to go!

Ben

Gleaner M3 AHHC

centash

Well-known Member

centash

Well-known Member

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