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G clutch again....

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coonie minnie
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PostPosted: Tue May 04, 2021 4:44 pm    Post subject: G clutch again.... Reply to specific post Reply with quote


So, a month or so ago I got the clutch back together on my G. New facings, toggles, dogs, bolts. Yet I still have a problem... if I set it up nice and tight, like it should be, it won't stop. If I loosen it so it won't drag, it will slip very easily.

What am I missing????

The bearing seemed good, I repacked it with grease so I don't think that is dragging.

I've replaced the pulley brake, and messed with the adjustment.

The drive disk is on correctly, and about flush with the end of the crank.

I THINK the brass fork is in the right place.

I and T suggests milling some off the operating sleeve in such situations.... is this something I need to consider?

The tractor had similar symptoms prior to coming apart. I did find a crack in the center disk, and a cracked dog... I hoped this would solve the issue. Ideas out there??????
 
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coonie minnie
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PostPosted: Tue May 04, 2021 5:06 pm    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

I would add that I was a bit concerned with the new dogs... they were from an aftermarket supplier, and the holes were not drilled particularly straight.
 
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RLA
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PostPosted: Wed May 05, 2021 4:09 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

Well from my experience if the drive disk to flush with the crank shaft it's going on too far. You could reinstall a worn inside clutch
disk & see if that helps I believe your issue is it's dragging on the inside facing. Or you could attempt to make a brass shim for the driver
as a test. I've used a pop can too. If you can get it to fit & if you get it tight it will last a VERY LONG time. It's cheaper than buying a
driver. This is my 2 cents.. LOL
 
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Mark-Ia
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PostPosted: Wed May 05, 2021 4:10 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

Is your clutch brake adjusted correctly?
 
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Broken wheel
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PostPosted: Wed May 05, 2021 6:49 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

If you used an after market pully brake pad, they are too thick. I had the same problem on a J D 70. If there is too much wear on the sleeve the clutch will start to engage when you pull the clutch lever back. You can check that by pulling back on the lever when the pully is stopped and see if it starts to drive again.
 
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coonie minnie
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PostPosted: Wed May 05, 2021 6:26 pm    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

Thanks for the advice, gentlemen...
 
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Ken in MN
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PostPosted: Thu May 06, 2021 1:57 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

I recently did a clutch on a late G and had somewhat similar issues. In my case, the aftermarket disc/facing that slides onto the bolts was binding on the bolts. I drilled the holes out just enough for them to slide freely on the bolts.
 
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coonie minnie
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PostPosted: Thu May 06, 2021 2:49 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

I'll look at that, too.
 
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coonie minnie
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PostPosted: Thu May 06, 2021 4:02 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

I was wondering about this as well. Thanks
 
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RLA
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PostPosted: Thu May 06, 2021 11:57 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

Only other thing might be give it a little more crank shaft endplay.
 
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coonie minnie
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PostPosted: Thu May 06, 2021 2:52 pm    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

End play is pretty tight right now...
 
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kurt v
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PostPosted: Fri May 07, 2021 7:23 am    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

Do you have the discs on the correct pins (rod) ?
 
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RLA
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PostPosted: Fri May 07, 2021 3:06 pm    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

I had a issue with a 620 black dash, but I had too much clearance in the inside disk, I figured that out after I replaced everything new & still had a problem. New dogs, pin's, adjusting T bolts, brass fork floating plate all the disk. Only thing that wasn't new was a adjusting plate, drive disc & pully. Drive disk fit perfect & lacked a little better than a 1/8 from flush with the crank. When tractor was shut down & clutch adjusted seemed perfect, but when running wide open it would fall out. Loosen the adjustment it would not fall out/ disengage but it would slip. What what happening only pulling on the outside of the disk. I tired moving the crank shaft but was already against the the plastic spacers inside the case. If I install 2 worn disc on the inside it worked perfect. I removed the pulley from our 630 which worked perfect & installed on ton the 620. The clutch worked perfect, with little effort to snap in & it wouldn't slip. So I put the whole pulley on the 630 & it suddenly had the same problem. What I found out in the end the pulley on the 620 was cut too deep. When I bought the tractor the man told me, ever since he owned it, they clutch was hard to get it right & keep adjusted right. I thought I could fix that easy? Once I found a good used pull asy, the tractor now has a nice clutch. There was almost 3/16 difference between the 630 pully & the 620 pulley measuring from where the cover mount to the machined clutch face.. The used pull I bought came off a 630 also, it was a struggle but it's fixed.
 
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coonie minnie
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PostPosted: Fri May 07, 2021 5:33 pm    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

I'm not completely clear on where you are measuring from???
 
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coonie minnie
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PostPosted: Fri May 07, 2021 5:34 pm    Post subject: Re: G clutch again.... Reply to specific post Reply with quote

On a G, they go on the bolts... there are no pins like on a 70 or similar...
 
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