It is difficult to get all the CC out of a tube unless you have the tube out of the tire and rinse it a frw times with a few gallons of water each time. The WD I am working on has had CC in it, I got rid of most of it, the rims are shakey looking. I will be taking them apart at some point after I get the rest of the tractor done to see how bac they are, nice tires though. I put the valve stem at the bottom and unscrewed it and lit the tire go flat, draining the CC. Had to add air a few times to get it all to come out, and still there is some left at the bottom. Yes, 3 plugs, one under the differential, one under the transmission in the sheet metal cover plate, and one in the bottom of the PTO, or in the cover plate where the PTO would go if you don't have a PTO. Two filler plugs, one in front and one behind the clutch pedal, take your pick, pour in one, check level in other. The one with the finger twist off cap in front of the transmission plugs in the hydraulic system. Wouldn't hurt to change that too. The drain plug is infront of the PTO. AC used 20w engine oil, hydraulic oil or "tractor lube" a combinaton gear/hydraulic oil is ok. The hydraulic oil also lubes the belt pully if you have one. If you don't it would plug into the hole in the frame rail on the right that goes into the bellhousing, it is about 3 1/2" in dia. I think. Again your manuals will make all this clear.
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