cub farmall transmission gears???

Wes Verbal · Feb 21, 2017

Been trying figure this cub i have on the
shifting? I can start it up run great no
issues. But as soon as i push clutch all way
in it will grind a little as i try to move
into gear? I can hold clutch in for few mins
and it want grind as bad but if you run to
operating r.p.ms it will grind? Is this
normal? Ive read that the gears are not
sinkroniz so a little rattler or rub is
normal/: but im no so sure this is...as it
does it all time? Does the clutch need a
adjustment maybe?or is this normal for these
little tractors?

David G · Feb 21, 2017

It is definitely a clutch not releasing issue, adjust first.

There is Farmall section for posting.

Dave F. · Feb 21, 2017

Sounds like your fingers on your pressure plate need adjusted, go to www.Farmallcub.com for instruction on how to adjust clutch/pressure plate fingers. Dave F.

Wes Verbal · Feb 21, 2017

Thx much on the help very aggravating! Ill look into web site.

47fivewindow · Feb 21, 2017

probably gonna need a clutch but ... They need oil in the trans to hold the gears still, check that. There is a grease fitting on the bottom of the throw out bearing that needs periodic attention. It is accessed thru the inspection plate.

jimg.allentown · Feb 21, 2017

It has always been my understanding that the transmissions in most tractors are not synchronized. That would mean that in order to shift while moving, the speed between the engine and the final drive would have to be matched as it would in a big truck to shift without grinding. Double clutching is how this is accomplished. Not sure how that would work with a hand throttle. You would have to reduce the RPMs in order to get into the next higher gear. Easy to do with a foot throttle, more difficult with a hand throttle.

T.R.K. · Feb 21, 2017

Are you saying that as long as you hold the clutch pedal down it grinds?

does it also do it when you release the clutch?

Does the clutch pedal come back up when you release it?

Dad's Cub used to make a chattering noise when the clutch was pressed in, but not when the clutch was engaged and my foot was off the pedal. A new release bearing and adjusting the clutch release fingers fixed that.

K-Mo · Feb 22, 2017

First adjust the clutch pedal for about 1" of free travel. If you have Hy-Tran in the transmission, you could change to standard gear oil.
This would not be the problem, but my compensate for a dirty clutch pilot bushing.
That's about all that can be done without splitting the tractor. If the cover on the bottom of the clutch housing is not installed, mice like the housing for a home. Mice or no mice, I would suspect the clutch pilot bushing may be dirty or gummed up.

John B. · Feb 22, 2017

I would say your clutch pressure plate is rusted on the shaft and not sliding away from the flywheel. Yes these old tractor transmissions are not synchronized because you don't shift them on the go like you do a truck. First see how much free play your clutch pedal has. Then adjust if necssary. Then when you let the clutch out watch for clutch pedal position to when the clutch begins to grab and move the tractor. If it grabs when the pedal is almost all the way up the clutch disc is thin and may need replacing. Almost always the problem you're describing is due to the clutch disc is rusted to the shaft and not sliding away from the flywheel. If it was stuck to the flywheel you would never get it in gear while the engine is running.

4wdtom · Feb 22, 2017

I agree, check that the oil is up to the level plug on the side of the transmission. And agree you can use a gear oil like 80/90 weight.

used red MN · Feb 22, 2017

Here it is plain and simple. Hold down the clutch and put it in gear after it is in gear put it back in neutral and continue hold the clutch down. After about a 3-5 count try to put it back in gear, if it grinds something is not lettering the clutch totally release or the pilot bushing is dragging. If it goes back in gear with no grinding it is simply gear momentum causing the grinding and you just have to wait longer before trying to shift into a gear.

Wes Verbal · Feb 22, 2017

Ok ive been looking into the inspection hole at the bottom of the cub and notice the through out bearing in getting worn bad on onr side?? Uneven it looks ?? It is a graphite made one? What is causing this uneven fingers?

BarnyardEngineering · Feb 22, 2017

Likely causes: Wear and tear. Improper adjustment. Lack of maintenance.

It sounds like you really need to split the tractor and install a new clutch disk, pressure plate, throwout bearing, and pilot bearing. Cubs are fairly easy to split. You can split them with a floor jack and some blocking on a smooth concrete surface.

Wes Verbal · Feb 22, 2017

Yeah.... i look at the through out bearing
and it graphite made..? There is graphite
dust on each clutch fingers. And the tips of
the fingers really really shinny not sure if
the graphite is suppose to collect that much
? I checked the clearance on the clutch
peddle which was 2 inch. Out.....the book
shows to be 1inch free travel etc. So i
loosen nut and fixed that right there look
to be 1/8 free travel between bearing and
fingers area?

Wes Verbal · Feb 22, 2017

Is this graphite clutch suppose show this
much collection of powder inside the housing
? Is this consider normal for this type of
through out bearing?

Wes Verbal · Feb 22, 2017

Here pic of the indide. Area

Andy Martin · Feb 22, 2017

(quoted from post at 17:08:16 02/22/17) Here pic of the indide. Area

The picture is a little fuzzy but it looks great to me.

As mentioned rust on the shaft can make the clutch drag, but this looks pretty clean. Another thing that can happen is the clutch plate gets stuck to the flywheel or pressure plate. Then when it gets broken loose (by dragging the tractor, etc.) a piece of the clutch lining breaks off and gets wedged between the clutch disc and the flywheel. The clutch won't drive the tractor disengaged but it will spin the gears.

To live with it, start it in gear and with the tractor stopped, shift between gears quickly.

If the condition persists after adjusting and greasing the throwout bearing ( I see the zerk) you'll need to split it.

Hobo,NC · Feb 22, 2017

I have had 4 Farmalls in the 100/140 line they all have been grinders even with new hardware I try and just wait on them.

Wes Verbal · Feb 22, 2017

Yeah pictures wasnt to great. Sry for that..
yeah ive notice thst one of the clutch
fingers is sticking out further thsn the
other to are? And the reason whyy the
bearing is a little uneven. Could a man
just aline the figure to even out with the
other to? And should be ok .

Hobo,NC · Feb 22, 2017

Mine may get ran 1 hour a year Maybe that may be why they are grinders. On the 140 the clutch has stuck one time over the winter.

I live with it as every thing is in proper working order if he is unsure split it. Very few folks know how to adjust a clutch free play in the pedal is nice but has little to do with a properly adjust clutch in theory. Proper adjustment has to do with the relationship of the release bearing and the presser plate fingers like in you pix clutch pedal free play has nuttin to do with it.

cub farmall transmission gears???

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