Brain cramp - Farmall Cub

Tom Fleming · Jan 4, 2011

Uh, anyone know where the drain plug is for the tranny/differential on a Cub? I want to change the gear oil, and either I was too tired last night, or I can't find the drain plug.......

Oldiron29 · Jan 4, 2011

Tom, If I remember right! under the floor pan half way from battery to clutch pedal. Should be
sqaure head plug. I think thats to check level.
and under the tranny case is drain plug.
oldiron29

Tom Fleming · Jan 4, 2011

Thanks Old. I'll get the creeper out tonight when I get home from work.......

CraigChristian · Jan 4, 2011

It's right on the lower, front facing the front of the tractor. As 29 stated, it's a square head plug. While you're at it, put it in neutral, take the top cover off, and flush out the gearbox using kerosens or my personal favorite - brake cleaning fluid in a spray can! There are 2 holes in the upper casting designed for lubing the shaft so make sure those holes are cleaned out as they're "splash" lubricated !! Craig

Denny ('60 Lo-Boy) · Jan 4, 2011

The capacity is only 3.5 PINTS. Any more and it'll leak past the seals.

Challenger · Jan 4, 2011

The problem with so many transmissions is that rain can enter the case through the shifter rod if the tractor is left out. There is also some condensation that can accumulate in the case. As was suggested, first drain the crud out, then take the cover off, pour kerosene or diesel fuel in the case, drive the Cub around to slosh and clean the case, and then drain the swill out before putting new oil in the case. I have made a seal for the shifter rod by taking the spring off, installing a flat washer above the dust cup that has a slightly oversize hole to fit around the upward protrusion of the dust cup, rolled a snug O ring down to the washer and installed another close rod fitted washer over the top of the O ring. Then install the spring which squeezes the O ring between the two washers and against the shaft and keeps the rain from entering the tranny. The whole repair costs about 50 cents.

Tom Fleming · Jan 4, 2011

Thanks all. I located the plug, and she is draining. I also cleaned out the tranny case with brake clean. I will also do a final rinse with kerosene.

So, now another question. Should I remove the PTO cover, and wash it out from the back also. I probably will replace the seal if I go that route, as it is starting to seep a bit of oil back around the shaft.

Once again, thanks to all. I was looking for the drain plug from the rear of the tractor, and explains why I couldn't find it. It jumped out and bit me once I slid underneath on the creeper.

charles todd · Jan 4, 2011

Nice fix with the washers and o-ring. I may check out my 504 and see it that could be done.

CT

Brain cramp - Farmall Cub

Tom Fleming

Well-known Member

Oldiron29

Well-known Member

Tom Fleming

Well-known Member

CraigChristian

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Denny ('60 Lo-Boy)

Member

Challenger

Member

Tom Fleming

Well-known Member

charles todd

Well-known Member

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