Transmission shifting question

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Glen
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
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Re: Transmission shifting question

Postby Glen » Sun Apr 23, 2017 6:39 pm

Hi,
Here is a post from page 3 of your post.

Here is a page from the Cub service manual showing the size of the end of the clutch shaft, and the running clearance for the bushing. Measure the shaft end, it should be smooth, and then ream the bushing so it is .004 - .006 inch bigger than the shaft, like the page says. :)

http://www.farmallcub.info/manuals/gss- ... 005-02.jpg

They make bushing reamers, to make bushings a precise size inside.

Do you have a dial caliper to measure the pilot bushing.
Did you turn the clutch shaft when it was split to see if the shaft is straight, at least one person had a bent shaft, I have read on here.
Did you clean the splines the clutch disc is on, and try the disc on and see if it slides freely on the splines. A very light film of grease on the splines helps it move better, but don't put on enough that it flies off onto the lining.

I don't know other than that why it doesn't work right, it's hard to know without being there.
Maybe one of the guys with a first style clutch linkage will write something.

rstoots
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Re: Transmission shifting question

Postby rstoots » Mon Apr 24, 2017 4:29 pm

Measured shaft and pilot as best I could with digital caliper. Shaft + .6220, pilot + .6335 or more.
I have another used pressure plate and dikk on the way just so I have something else to test with.
Rejoined Cub without plate and disk, PTO turns with little resistance.
Waiting on seal from tst so can't do much more.

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Glen
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Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Transmission shifting question

Postby Glen » Mon Apr 24, 2017 5:50 pm

Hi,
If the shaft turns freely without the clutch on the flywheel, when you put it together, like you said, it sounds like the clutch is dragging somehow, and not fully releasing.
Can you adjust the yoke so the throwout bearing pushes forward a little more, pushing the fingers down a little more, you don't want the metal parts hitting the pressure plate when the engine is running though. :)

rstoots
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Re: Transmission shifting question

Postby rstoots » Tue Apr 25, 2017 10:01 am

Probably why he had the washers under the pressure plate. The PP is adjusted to 1 1/8" now and adjustment screw is level with nut.

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lliberto
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2011 Husqvarna YTH24V42LS
Location: WV, Weirton

Re: Transmission shifting question

Postby lliberto » Tue Apr 25, 2017 11:47 am

Dale Finch wrote:You can never shift "on the fly" with a Cub. You must ALWAYS come to a complete stop before changing gears. You basically pick a gear to drive in. If that is the wrong speed or power, stop, THEN shift into a different gear letting out the clutch peddle slowly. Sometimes the cub has a hard time starting in 3rd gear, and be aware it can do so with a startling "leap", so hang on!!

NOTE: If the cub is grinding while trying to shift into gear while stopped, you may just need to adjust the clutch and/or free travel of the clutch pedal.

NOTE #2: Just realized bofahs already said it...Only more succinctly! :lol:


I haven't tried this myself, but couldn't you just double clutch the Cub if you wanted to shift "on the fly"?

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Dale Finch
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Re: Transmission shifting question

Postby Dale Finch » Tue Apr 25, 2017 1:48 pm

Probably... :?

Matt Kirsch
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Re: Transmission shifting question

Postby Matt Kirsch » Tue Apr 25, 2017 2:27 pm

Problem with double clutching is you can't build up enough momentum with the Cub to give you enough time to perform the maneuver. In 1st or 2nd, the tractor stops almost instantly when you push the pedal unless you're going downhill, and then you don't need to shift on the fly to get going in 3rd. In 3rd, you don't have any more gears to grab.

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Glen
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Posts: 2624
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Transmission shifting question

Postby Glen » Tue Apr 25, 2017 4:10 pm

Hi,
It could be that the pressure plate is a replacement in the past, and has the adjustment screws that are too short to raise the fingers enough. Someone on here had that, and he bought new adjustment screws that were longer, so he could raise the fingers more. Search for the post at the top of the page, if you want to see it.
Or maybe the pressure plate you are buying has the longer screws.

Here is a post about the screws, read what Boss Hog said at the end of the post. :)

viewtopic.php?f=1&t=93200&p=736077&hilit=pressure+plate+screws#p736077

rstoots
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Re: Transmission shifting question

Postby rstoots » Thu Apr 27, 2017 3:04 pm

Glen,
Installed used PP and clutch. PP was set at 1", Could not turn PTO.
Re-installed at 1 1/8" and PTO turned freely. Turned engine and PTO did not turn.
That's far as I got. Will install original PP with old clutch to see what happens and will install Used PP with new clutch.
I want to know what caused the problem so others will know'. Maybe the PP needs to be set at 1 1/4" with new clutch.
I'll let you know.
Dick

rstoots
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Re: Transmission shifting question

Postby rstoots » Sun Apr 30, 2017 4:59 pm

Installed rear seal from tst, he does good work.
Installed ebay PP with original disk and PTO was hard to turn.
Going to re-install ebay PP and ebay disk and button it up.
I'm going to assume the disk was causing the problem since both PP's were adjusted the same.. There are no part numbers on the disk so not sure if it's the correct disk.

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Glen
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Posts: 2624
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Transmission shifting question

Postby Glen » Sun Apr 30, 2017 5:19 pm

Hi,
It sounds like the fingers set too low was causing it to not release. If they were at 1 inch, that is too low.
Adjust them so it will release, 1 1/8 - 1 1/4 inch is supposed to work.
Here is what the clutch disc looks like, they also have a flat lining, without the cutout areas on the lining. :)

http://www.tmtractor.com/new/cl/521fp.htm

rstoots
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Re: Transmission shifting question

Postby rstoots » Sun Apr 30, 2017 7:13 pm

Both are set at 1 1/8"
The problem with the disk would probably be with thickness. I could probably adjust to 1 1/4 and make it work but I'm going to go with ebay set-up until I have a problem with clutch.
Thanks for the help from all who contributed, now on to the touch control system.

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lliberto
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Tractors Owned: 1947 Farmall Cub
viewtopic.php?f=1&t=94614

1952 Farmall Cub
viewtopic.php?f=1&t=100147

2011 Husqvarna YTH24V42LS
Location: WV, Weirton

Re: Transmission shifting question

Postby lliberto » Mon May 01, 2017 2:28 pm

Matt Kirsch wrote:Problem with double clutching is you can't build up enough momentum with the Cub to give you enough time to perform the maneuver. In 1st or 2nd, the tractor stops almost instantly when you push the pedal unless you're going downhill, and then you don't need to shift on the fly to get going in 3rd. In 3rd, you don't have any more gears to grab.


Good point! :)


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