Combines 9600 Gear boxes what oilIJ

80-90 in all of them Reverser takes 1 qt. Primary Countershaft Gearcase takes 1 and 1_4 qts aka 2.5 pints loading auger gearcase is filled to top of knurled area on the dipstick.

We run synthetic 80-90

Do you change your oil as often as the book states with synthetic or can you run it alot longerIJ Someday they need to invent a gear box with some sort of filtration pressure system. Be easier to pitch a filter and fill back to line level on some of these. That gear box behind the cab is a real booger.

I have used the deere 80-90 oil, never tried any synthetics. The drain interval for the reverser is WAY too long, in wheat and beans the reverser doesnt get to warm and is usually ok thru a harvest season. For corn I change the oil weekly as the heat buildup really breaks it down, and a qt. of lube is cheap compared to a rebuild. 100 sep hrs. would be about the max I would go when working the gearbox hard. The countershaft gearcase gets checked every other day for level and I usually take a whiff of how it smells, when it starts to get darker and smell like sulphur, I change it out. Over 4,000 acres a year I usually change it twice. To drain the case, a 28mm socket fits over the pipe plug, you may have to hold the drain tube with vice grips if it wants to turn. Use a gallon jug with the side cut out for a drain pan and also find a funnel that will work for both filling and draining the case. The loading auger case oil can run a long long long time, just keep it filled to spec. Hope this helps, Gg

You change the reverser oil weeklyIJ I must not use mine very hard at all. 6R 30" corn head, 20' table. I do think that reverser needs to be kept free of chaff, and in corn that happens pretty fast and it really will insulate. I imagine with a 12R head that would cause a ton of heat buildup. Cooler wouldn't hurt anything either. gs