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Reload this Page PTO Clutch repair - 1864
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  #11  
Old 07-19-2017, 11:49 AM
Rex B Rex B is offline
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Default Field-expedient repair
So, while waiting for a new clutch, I took a look at the old one. Mine is not air-gap adjustable. I could clearly tell by the unworn area near the hub that about .010" had been lost in the plate thickness, opening the air gap well beyond spec. So when the clutch got warm and expanded, it would let go.
What sets the gap is the length of the hub on the intermediate plate - closest to the engine. By reducing the length of the hub that should close up the air gap by whatever amount is removed.
So I took it over to the lathe and trimmed it a bit, shooting for .010" based on the Mk1 Eyeball. Just took a touch.


Once home, I zipped it back on and headed to the unfinished front yard. I finished mowing and then cycled it a few times. It seems as good as it ever was, possibly a bit better. The only possible negative is the blades do not stop as quickly, probably because the gap to the brake magnets changed. Might be my imagination as I never paid that much attention before.
So that worked out, and I have a working mower. I'll still change out the clutch (and grille shell - thanks Sam) but in the meantime I can keep up with chores.

Thanks for all the input guys, it was very helpful.
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  #12  
Old 07-19-2017, 01:09 PM
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Sam Mac Sam Mac is offline
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Good idea.
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  #13  
Old 07-19-2017, 01:43 PM
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Glad you got it going.
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  #14  
Old 04-10-2018, 02:11 PM
Rex B Rex B is offline
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Followup - Looks like my short-term fix was exactly that. Somehow when it gets hot it kills the motor, just like it's running out of gas. If I flick the PTO switch off, the motor perks back up. Time to order that clutch.

At least it got me through the last mowing season.
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  #15  
Old 04-10-2018, 05:56 PM
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ol'George ol'George is offline
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Quote:
Originally Posted by Rex B View Post
Followup - Looks like my short-term fix was exactly that. Somehow when it gets hot it kills the motor, just like it's running out of gas. If I flick the PTO switch off, the motor perks back up. Time to order that clutch.

At least it got me through the last mowing season.
Make sure it is not the deck that is pulling the motor down.
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  #16  
Old 04-10-2018, 08:05 PM
Rex B Rex B is offline
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Make sure it is not the deck that is pulling the motor down.
Shouldn't be. I had just finished greasing the spindles and sharpening the blades. Then I mowed a bit, was almost done when it started dying. I had to let it cool before I could cut the rest.

But good point, I'll spin it when I remove the belt.

I went ahead and ordered a clutch, because I know it's on it's living on borrowed time.
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  #17  
Old 04-11-2018, 08:50 AM
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sorner sorner is offline
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Originally Posted by Rex B View Post
My PTO clutch kicks out about one lap of the yard. Apparently it's worn to the point that it cannot engage once it expands from heat.

My Cub uses the 5218-6 clutch which is the non-adjustable version. Looking at it, I think I can close the airgap by machining the center hub where it contacts the front (outer) bearing. My question is how to know how much to take off.

Anyone else here tried this?

BTW, the cheapest clutch I found was $125, which is probably what I'll end up doing. But I did find the same clutch here for $21.99!

http://www.newarrivalecshop.top/inde...oducts_id=4644

I don't have the courage to try it though
What is this site? Direct from China?
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  #18  
Old 04-11-2018, 09:37 AM
Rex B Rex B is offline
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What is this site? Direct from China?
I don't know. I walked down the buying process until I got to payment. I saw they don't take Paypal or AMEX, and I bailed. I would have ordered otherwise, just to see what happens.
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  #19  
Old 04-11-2018, 09:41 AM
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sorner sorner is offline
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I don't know. I walked down the buying process until I got to payment. I saw they don't take Paypal or AMEX, and I bailed. I would have ordered otherwise, just to see what happens.
I smell fish... as in, that site looks fishy.
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  #20  
Old 04-11-2018, 09:49 AM
Rex B Rex B is offline
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I smell fish... as in, that site looks fishy.
I agree. But the site is still up, and the price is up 20% from last year.

Yep, Chinese, but apparently no reviews or scam reports. Just marked as risky due to country of origin:

https://www.scamadviser.com/check-we...ivalecshop.top

no https
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