Best way to drain transmission fluid

[ShawnAgne]

Didn't get around to draining the transmission fluid on the 300 last year so going to do it this year. Question I have on the Cub and 100 I'll put some diesel in there swish it around and drain it to help get out any remaining water, oil/water after I drain it. The 300 is a bit big to hand swish and since the hydraulic pump pulls from there I don't want to do that. Any recommendations?

[ajhbike]

On my big tractors with the combined hydraulic and transmission systems I don't do the swishing or driving around thing with diesel or fresh oil...too many nooks and crannies anyway. I will dump a little in to chase out residues. I guess I feel like the water will come out normally or there will be so little left behind that it will get muted by 6 to 11 gallons of fresh oil. Also, I believe I am going to get a little condensation the night after the oil change anyway, and all of mine are parked in sheds so I don't have water trickling down the gear lever issue.

[Gary Dotson]

I would just simply warm it up good, drain it out well and refill. While it probably wouldn’t harm the hydro system I wouldn’t take the chance.

[Jim Becker]

I would give it some time with the drain plug out to drain as much as possible, at least over night. By the way, I don't think the 300 uses the transmission for a hydraulic supply.

[Tired_Iron]

I agree with Jim, the hydraulic system does not use oil from the transmission on a row-crop 300. On a 300 row-crop tractor, the hydraulic oil reservoir is behind the dash panel cowl and in front of the fuel tank (300 utility may be different) under the covers. The plug/dipstick are visible without removing any sheet metal. Remove the drain plug and leave it set for a day or two if possible, maybe drive front end up on some wood blocks to bring the front end up. Also, if your transmission has water in it, I would also check your TA housing oil, my 400 TA housing is notorious for picking up water if I leave it outside (leaking gasket I would assume).

[ShawnAgne]

Ok, thanks for the clarification.
So the question I have is on the bottom of the tractor there are two drain plugs on the main tube. Now that I know its not one big tank what are the two separate areas?

Since the hydraulic tank is separate I"ll just let it go as I don't have any issues with it.

[Tired_Iron]

I don't have a 300, I have a 400, which may be the same or might be slightly different. A picture would be worth about 750 words right now.

One drain plug is for the independent PTO unit (what I referred to as the TA housing, my OM says it is a independent PTO unit) and its drain plug is located on a plate with 9 or so bolts that attach it to the independent PTO unit. The other drain plug is the front transmission drain plug and drains the front part of the transmission that isn't drained well or completely by the rear drain plug. The dividing line between the two areas is where the independent PTO unit bolts to the transmission housing. I hope this makes some sense. I can't find a good picture help illustrate what I am trying to say.