Pressure Plate Finger Loose

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lyle11
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Pressure Plate Finger Loose

Postby lyle11 » Wed Mar 17, 2021 4:29 pm

I finally put my 55 Lowboy in gear today after putting it away for the winter and had immediate clutch related noise and pedal vibration. I took a picture up through the access hole and the picture clearly shows the problem. Apparently a cotter key broke off and the clevis pin has moved leaving a pressure plate finger loose.

I’m trying to determine if I can use a stick to push the finger back into place so I can push the clevis pin back into the hole. I’m thinking with the spring under it that’s gonna be hard to do.

Just wondering if anybody has ever had this happen if if they were able to resolve it without splitting the tractor. I guess at least I got lucky with the issue being clearly visible through the access hole.
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Re: Pressure Plate Finger Loose

Postby Bill Hudson » Wed Mar 17, 2021 4:48 pm

Lyle,

If it were me, I would split the Cub to thoroughly evaluate possible damage that is not easily observed through the hand hole. The upside of what you propose to do is, if you get it to work and after startup there are no issues, you're ahead.

Bill
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Re: Pressure Plate Finger Loose

Postby Cubfriend » Wed Mar 17, 2021 4:51 pm

I believe that is what was wrong with a Loboy I bought last year and much adjustment needed. Was able to fix it without splitting the tractor. Good Luck!
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Re: Pressure Plate Finger Loose

Postby Jim Becker » Wed Mar 17, 2021 5:07 pm

Looks like the same story as this:
viewtopic.php?f=1&t=110066
In that thread, I suggested backing off the finger adjustment to help get it back in. Rotate it so you can inspect all the way around the clutch for other damage. Completely readjust the finger height of all three fingers after you get the pin back in.

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Re: Pressure Plate Finger Loose

Postby SamsFarm » Wed Mar 17, 2021 5:13 pm

You will feel like a surgeon working on that through the hand hole!

A couple of pry-bars and a good light mixed in with a bit of patience, and you just might get it!
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Re: Pressure Plate Finger Loose

Postby Glen » Wed Mar 17, 2021 5:45 pm

Hi,
You may not need to do any prying if you loosen the adjusting bolt lock nut, and turn the bolt out for the one finger.
If you pry something, be careful and don't pry on the throwout bearing or the graphite.

I would use a good light and inspect the throwout bearing graphite for cracks, or anything broken, hopefully it is still good.

Below is a post from the How To section, showing how to adjust the pressure plate fingers through the hand hole. You will need to make the tool shown in the post.

viewtopic.php?f=141&t=66543

They have said on here that it makes more room to adjust the fingers if you loosen the clutch pedal free play adjustment, at the pedal base, and move the throwout bearing to the rear.
Then when you are done adjusting the finger height, you will need to set the pedal free play to 1" again.
That is for Cubs with the external clutch pedal free play adjustment. :)

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Re: Pressure Plate Finger Loose

Postby lyle11 » Thu Mar 18, 2021 3:13 pm

Bill Hudson wrote:Lyle,

If it were me, I would split the Cub to thoroughly evaluate possible damage that is not easily observed through the hand hole. The upside of what you propose to do is, if you get it to work and after startup there are no issues, you're ahead.

Bill


Thanks for the replies. The more I think about it, I think Bill is right. I just replaced the rear seal on this Cub last summer, rebuilt the touch control, and installed a Woods 59 which I plan to put into use this year. The TO bearing didn’t look great, but after reading comments about new TO bearings not lasting, I decided to leave the old one in realizing it may only last a year or two. I’ve done six Cub splits at the rear of the engine so, I guess it’s time to do it again.

I’d like to order a TO bearing from TM today and get a jump on it, but I better hold up until I see if there are other damaged parts.

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Re: Pressure Plate Finger Loose

Postby SamsFarm » Thu Mar 18, 2021 4:31 pm

lyle11 wrote:I’d like to order a TO bearing from TM.


Lyle,

Are you going with the graphite type or going to get one of the bearing type like Lt.Mike did in his post here

viewtopic.php?f=1&t=109886

Something to consider..... Maybe??? :)

Good luck!
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Re: Pressure Plate Finger Loose

Postby tst » Thu Mar 18, 2021 4:55 pm

I have seen many like this, loosen the adjuster and it has no pressure, pull the pin to make sure the pin sticking up from the pressure plate the hole is not all worn out or the finger, if they are good you luck out and put the pin in it, adjust it up and you win for once

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Re: Pressure Plate Finger Loos

Postby lyle11 » Thu Mar 18, 2021 5:10 pm

Sam,

When I looked at past threads I recall one about the graphic type failing after a couple of months. TM states that the one they offer is foreign made but “we’ve had good success with it” or something like that. I’d love to get something that’s more durable. Thanks for the information. I’ll check it out later. It’s a miserable day here after a rare dry, warm stretch in NE Ohio but I think you live in this area. I’m working in an open garage moving my front wheels out to accommodate the Woods 59, which I want to do before I split the tractor. The tractor originally had a fixed axle and I bought the adjustable in pieces so I wasn’t worried about pulling it apart. Lots of Never Seize and it slides right out. If I can get the mower out from under it today I’ll be satisfied.

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Re: Pressure Plate Finger Loose

Postby Don McCombs » Thu Mar 18, 2021 5:32 pm

The graphite TOBs are all foreign made. Typically, the ones that fail prematurely have not been properly pre-lubricated. Soak the bearing in motor oil for about a week, then lube with cheap grease until the grease comes out the relief hole.
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lyle11
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Re: Pressure Plate Finger Loose

Postby lyle11 » Fri Mar 19, 2021 9:12 am

I found a couple of photos I took of the TO bearing in July 2019 when I split this Cub to replace the rear seal. I read the threads about problems with the new graphite bearings. I see the cracks in this one and it looked dry to me. I decided to grease it in the hot weather and leave it in.

It looks rough, but I don’t have any real experience with these TO bearings and figured, despite the cracks, maybe it lasts for a few years. Does this look like it needs to definitely be replaced?

If the consensus is that it should be replaced then I will forget trying to fix the finger through the access hole and proceed with splitting.

Thanks

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Re: Pressure Plate Finger Loose

Postby tst » Fri Mar 19, 2021 10:59 am

it will just blow apart in chunks and make more costly repairs, replace it, soak the new one at least a week in light oil so the graphite absorbs the oil, if you want to go further do it in a coffee can and if you have say a old hot plate let it cook, when it gets hot the oil will get soaked up good
then only grease it with CHEAP grease, the kind that melts easy, if you use good grease it does not melt and the graphite will go dry and fail, I found the TRC grease in the green tube works well, 1 0r 2 bucks tube

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Re: Pressure Plate Finger Loose

Postby lyle11 » Fri Mar 19, 2021 11:47 am

Thanks Tim. I guess now I don’t have to waste any time and get my hand scraped up reaching into the access hole.

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Re: Pressure Plate Finger Loose

Postby Glen » Fri Mar 19, 2021 5:27 pm

Hi,
The wear pattern on the throwout bearing graphite in your 2 pics above does not look how it should be.
The pics were before the problem it has now, if the pressure plate fingers were ok before, it should have had a smooth wear pattern, centered on the graphite.

Check the throwout bearing holder for being loose up and down, or side to side.
The holes in the holder, and the top pin can wear, then the holder can move around more than it should.
If the sides of the holder are bent in, the bearing can move side to side too much.
The sides of the holder should be almost against the clutch housing, so the bearing is held in 1 position side to side, centered on the 3 fingers.

TM Tractor has a new holder and top pin, if the holder and pin are worn. :)


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