I replaced the controller assy. Same thing . I switched my controller from my 810 last night and it works. I am sure that the 860 controller doesn't have the momentary feature. I thank you for your efforts. Dean
I couldn't PM you but if you get a shipping quote for the spreader to 49307 I will buy this from you this week, so you can ship it by Friday. Just email me at firstname.lastname@example.org. I will check on prices from Moline. Thanks.