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Ford Tractors Discussion Forum
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Re: SOS Band adjustment warning

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mooger

04-17-2013 20:44:09
69.35.176.123



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You"re blaming yourself and I certainly don"t wish to make you feel worse, but the real lesson that could be taken is: Don"t drop down in the middle of a technical manual and start twisting bolts -- begin at the beginning.

You stated twice in prior posts that the manuals were "cryptic," but they"re actually straightforward. Both the Ford and I&T FO20 SOS sections begin with a description of how it functions followed by troubleshooting and adjustments. Then begins complete disassembly/overhaul followed by reassembly.

There was no spring pressure against the interlock cover so there was no need of "releasing the Band 2 adjusting screw per manual instructions" as you did. That indicates you were in disassembly/overhaul instead of the adjustment section, and is what I meant by starting in the middle of a technical description. I cautioned twice about losing a strut or struts - "SOL at that point, etc."

As I understand it, there were problems with the transmission when you got the tractor, so somebody may have been there before you. A few years ago, a guy asked here about SOS problems in a tractor he was looking at to buy. The owner told him that he had "yanked out that screw trying to fix it" (as he pointed to a band adjusting screw).

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jeff pk

04-18-2013 10:40:35
50.39.128.154



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 Re: SOS Band adjustment warning in reply to mooger, 04-17-2013 20:44:09  
Are you saying that there IS some section in these manuals that warns the mechanic not to loosen the band adjusting screws too much, or a strut will drop? If so, I'd like to see that---I must have missed it.

Also, what is "straightforward" for one person might be "cryptic" to another. I'm not well versed in the language or theory behind complex machines. I can tune the older motorcycles or tractors, and have replaced a clutch in an old Volvo once.

It was my impression that my loosening the #2 band screw is what resulted in the lack of spring pressure behind the cover.

Please don't get the notion that I don't value your opinions or help. I know you warned me about struts dropping. and if I had followed your warning to its conclusion I would not have dropped that strut.

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mooger

04-18-2013 22:04:42
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 Re: SOS Band adjustment warning in reply to jeff pk, 04-18-2013 10:40:35  
jeff pk wrote:

"Are you saying that there IS some section in these manuals that warns the mechanic not to loosen the band adjusting screws too much, or a strut will drop? If so, I'd like to see that---I must have missed it."

Ya got me there. There're no warnings because none are needed. The manual deals with the band adjusting screws twice:

First, it tells how to adjust the bands. Follow the instructions and there's no possibility of error.

Second, in the overhaul section, it says to remove the screws (by screwing them down into the case). At that point, the photos show the trans sitting on a stand with half the parts removed on the way to a empty case (bereft of struts plus everything else).

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jeff pk

04-19-2013 17:53:32
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 Re: SOS Band adjustment warning in reply to mooger, 04-18-2013 22:04:42  
No warning needed? On this thread alone there are two people who did it; and for some reason you yourself thought to warn another poster on this site in another thread about doing it.

From Oct.2011
"The B2 and B3 servo springs push against the interlock cover so before unbolting the interlock, the B2 and B3 adjusting screws have to be backed out to relieve some of the spring pressure. The risk there is that the band actuating struts will fall out of place if the adjusting screws are backed out too far. Each strut is a small, approximately square part that's the final bit of linkage between servo and brake band. The struts aren't pinned or held in any way - they're loose. Servo spring pressure keeps them in place. There's no access to replace a strut without taking the trans apart."

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