Low band adjustment?

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Model T Ford Forum: Forum 2009: Low band adjustment?
Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf on Friday, April 24, 2009 - 12:35 pm:

My low band is slipping and my Ford manual has disappeared. Aside from being very careful not to drop anything inside, does anybody have advice/instructions/warnings before I take off the cover?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce Peterson on Friday, April 24, 2009 - 12:46 pm:

Take the key out of your ignition. Take everything out of your shirt pockets.

Tighten the band enough so that all the force you can muster with your foot will not bottom out the pedal against the stop, but it is as loose as possible with no slippage on hills.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Seth Harbuck, Shreveport, LA on Friday, April 24, 2009 - 01:02 pm:

The low band is adjusted from the outside - no need in removing the tranny cover, the ignition key, or anything in your shirt pocket(s).

Seth


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Treace on Friday, April 24, 2009 - 03:04 pm:

Steve

Loosen the lock nut on the right side of the tranny cover, then turn the adjusting screw to the right to tighten the low speed band.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf on Friday, April 24, 2009 - 03:32 pm:

Armed with that information, I took a look at the transmission from my TT project, looked inside to see how the adjustment from the outside works, and adjusted the touring. A few minutes with a couple of wrenches made a big improvement. The former slow creep was transformed into a step-on-the-pedal-and-GO experience. I went to try it out on the "test corner". When the family wanted to get a new car in 1928, my uncle would have the dealer bring one out for a test drive. A nearby road goes south down a hill, and at the bottom another road intersects from the west at the bottom of a much steeper hill. Lester's test was to drive south, turn west, and go up that fairly short but very steep hill, all in high gear. The Hudson didn't make it without a downshift, and I assume the Model A didn't either, because they bought a Chebby. A Packard could have done it of course, by my family wouldn't have had the money for something like that. Today my T made the corner and most of the hill OK, but I had to use the pedal for the steepest part at the top. It worked just as it should, so I am happy. Gentlemen, thanks for the info.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Howard Tobias on Wednesday, April 29, 2009 - 04:49 pm:

I have read how to adjust the low speed band in two MTFCA publications and I think I am confused. When you adjust the low nut you have to adjust the screw on the end of that rocker arm too? It seems that these two adjustments are very interactive. I was able to adjust for a good grab on the low speed, but I can't seem to get rid of that slight creep. Everything concerning the little clevis and end play seem to be in order. Is there some slight nuance I am missing in this adjustment process. Does the rocker move like a seesaw only or does it also have an in and out movement with relation to the side of the transmission like the pedals do?
Howard


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce Peterson on Wednesday, April 29, 2009 - 05:35 pm:

The clevis adjustment gets rid of creep caused by the clutch being not fully disengaged. Make it longer to get rid of this problem.

It could also be that you have the three clutch adjustment screws too far in, which can also cause creeping.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Norman T. Kling on Wednesday, April 29, 2009 - 05:45 pm:

Here is a diagram on how to adjust the clevis on the clutch.
Norm
free neutral


Top of pagePrevious messageNext messageBottom of page Link to this message  By David_Cockey on Wednesday, April 29, 2009 - 05:45 pm:

If you are familar with a more modern manual transmission then a Model T transmission is likely to confuse you. The "clutch" in a Model T transmission only controls high gear. It has nothing to do with low gear, and is not engaged in low gear. This is fundamentally different than a more modern manual transmission, such as in a Model A. If it is dragging then the car will try to creep forward.

Low speed band controls low speed only: tight for low speed, otherwise loose.

Reverse band controls reverse only: tight for reverse, otherwise loose.

Clutch controls high speed ONLY: enganged with plates compressed by spring for high speed, otherwise disengaged with plates loose. The clutch is controlled by a fork which moves forward and rearward.


Top of pagePrevious messageNext messageBottom of page Link to this message  By David_Cockey on Wednesday, April 29, 2009 - 05:49 pm:

Adjust the low speed band so that when pushing hard on the low speed pedal the pedal is 1/4" to 1/2" from bottoming against the openning in the floor board. That's all there is to it.

Adjust the reverse pedal in the same manner.

Adjust the clutch linkage as in Norm's post above.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Royce Peterson on Wednesday, April 29, 2009 - 05:54 pm:

Often it is impossible to adjust the clutch as per the Ford instructions (like Norm's picture) because the clevis and clutch pedal holes get elongated and the "L" shaped threaded part gets worn. I have had to make longer "L" pieces to be able to get sufficient adjustment on the clevis length.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Howard Tobias on Thursday, April 30, 2009 - 10:46 am:

Thanks for all the input. Maybe it isn't as complicated as my mind made it out to be! I think I got it working right.
Stay tuned for more questions on other aspects of the Model T!
Thanks-Howard


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