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Farmall & IHC Tractors Discussion Forum
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Farmall A trans axel fluid

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Al Barneson

08-26-2007 14:48:16




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I have a 1939 Farmall A that I just drained the fluid from the gear case.It was milky so I figured it to have accumulated moisture over time.I was wondering what I should replace it with and how much it holds.I took out approximately 12 quarts.My son said 80-90 gear lube should work which I think makes sense.I just got through doing the Farmall 560 and used trans hydraulic fluid as it has a hydraulic pump.What I am not sure of is how full to fill it?Or the type of fluid.

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Andy Motteberg

08-26-2007 20:22:20




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 Re: Farmall A trans axel fluid in reply to Al Barneson, 08-26-2007 14:48:16  
Yes, make sure you use the 80-90 gear lube.



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ScottyHOMEy

08-26-2007 15:12:12




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 Re: Farmall A trans axel fluid in reply to Al Barneson, 08-26-2007 14:48:16  
Milky I guess! It's made to hold 6 quarts at most.

Al, you've obvioulsy found the drain plug so there's two or four (four if you have a PTO, two if not) plugs you need to be concerned with to refill. The tranny alone will take 5 quarts. The fill cap is the large plug just to the left of where the shift pattern is cast on top of the tranny cover. If you don't have too much sludge left, the five quarts ought to go right in there. The level plug for checking the tranny oil is on the left SIDE, near the bottom front of the tranny. It will be a square head plug and the rod for your left brake will probably be in the way, but you can get at it with an open end wrench.

If you have a PTO and/or belt pulley, there's a separate drain plug for that and I'd recommend you drain it first before adding oil to it, especially with all the excess fluid (moisture and whatever else!) you got out of the tranny. The plug is another square head, *conveniently* located above the PTO shaft and a little to the right on the underside, so don't lose that open end wrench. Drain that first and the REPLACE the plug.

I've seen in the IH literature two different measures (1/2 qt and a full qt for the PTO) so what I do is change the tranny oil out and leave the level plug on the tranny open. The fill plug for the PTO is pretty obvious right on top. I then fill the PTO until I start to get overflow out of the TRANNY level hole, and then close everything back up.

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Red Dave

08-26-2007 15:10:47




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 Re: Farmall A trans axel fluid in reply to Al Barneson, 08-26-2007 14:48:16  
80-90 gear oil is fine, as is 80-140 gear oil.

There is a small pipe plug on the left hand side of the transmission, behind the rod for the left side brake. That is the full line. Put it in the top until it comes out that hole.

If it has a PTO, there is an extra drain under it to get some old oil out of. Put a cup or so back in the PTO before you fill the transmission.



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Red Dave

08-26-2007 15:11:39




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 I forgot.... in reply to Red Dave, 08-26-2007 15:10:47  
It will take between 4 1/2 and 5 1/2 quarts of gear oil.



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