Inside '17 Transmission- is this acceptable?

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Model T Ford Forum: Forum 2014: Inside '17 Transmission- is this acceptable?
Top of pagePrevious messageNext messageBottom of page Link to this message  By James Chochole on Monday, July 14, 2014 - 09:26 pm:

I popped the trans cover off my '17 and saw a groove in my low speed drum. It looks very uniform and is the same all the way around.

I was wondering if this could be a casting groove, or did a rivet do this? Otherwise it looks like I have good band thickness yet and the other bands are fine.

What do you fellers think?

Thanks- Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By Norman T. Kling on Monday, July 14, 2014 - 09:47 pm:

It's hard to see the groove in your picture. I have seen drums with a groove cut all the way around and doesn't look like a wear groove. I don't know who made them, but if it is otherwise smooth, and not cracked, it might be good to use. See if you can find an experienced Model T person nearby who can look at it.
Norm


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Thode Chehalis Washington on Monday, July 14, 2014 - 09:57 pm:

Probably a groove from a rivet or bare band and as long as it is from some replaced band and not the current rivets/band it should be of no concern.
Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By James Chochole on Monday, July 14, 2014 - 10:06 pm:

Here's another pic- best I can get with 200 pixels.


Top of pagePrevious messageNext messageBottom of page Link to this message  By James Chochole on Monday, July 14, 2014 - 10:08 pm:

Do the bands look like Kevlar to anyone else? I bought the car with these bands and they seem larger and more yellow than Scandinavian cotton.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jack Putnam on Monday, July 14, 2014 - 10:13 pm:

There were no casting grooves. The bands look like replacement cotton bands, not kevlar.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Dan Haynes on Monday, July 14, 2014 - 10:32 pm:

They look like Kevlar to me.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Thode Chehalis Washington on Monday, July 14, 2014 - 10:38 pm:

Jim,
If you start with your original full sized photo and crop to just the area of concern, then resize your photo and post it to the forum there will be much greater detail in your posted photo.

You can use a online resizer to do that, like:
http://www.picresize.com/

Your photo could look like this but with much greater detail if you start with the original.



Jim


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Thode Chehalis Washington on Monday, July 14, 2014 - 10:41 pm:

I forgot, use about 1000 x 1000 pixels and less then 194 kb when you resize.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jerome Hoffman, Hays KS on Monday, July 14, 2014 - 10:46 pm:

No GROOVE, it's the parting line between the end plate and the drum. Pre 25' if late(wide drum it would look different).


Top of pagePrevious messageNext messageBottom of page Link to this message  By James Chochole on Monday, July 14, 2014 - 10:49 pm:

Here's another pic and I isolated the one drum.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Michael Deichmann, Blistrup, Denmark on Tuesday, July 15, 2014 - 04:31 am:

Jerome is right.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Andre Valkenaers on Tuesday, July 15, 2014 - 05:46 am:

James,
It seems to me, in the first picture, I see a crack in the low gear drum just before the end of the band at the pedal side.

Andre
Belgium


Top of pagePrevious messageNext messageBottom of page Link to this message  By Hal Davis-SE Georgia on Tuesday, July 15, 2014 - 07:30 am:

James, that last picture is the brake drum. If that is the one you are referring to, that is just where the two pieces come together like Jerome said. The low speed drum is the middle one. The one closest to the flywheel is reverse.


Top of pagePrevious messageNext messageBottom of page Link to this message  By James Chochole on Tuesday, July 15, 2014 - 08:39 am:

Thanks guys!


Top of pagePrevious messageNext messageBottom of page Link to this message  By Larry Smith on Tuesday, July 15, 2014 - 12:02 pm:

All I see is where the driving plate bolts up to the brake drum. Normal.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Jim Patrick on Tuesday, July 15, 2014 - 12:59 pm:

Dang! That is one DEEP groove! Could that possibly affect the integrity of the drum?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Jelf, Parkerfield KS on Tuesday, July 15, 2014 - 02:04 pm:

It's hard to tell from a picture, but in the first photo the ends of the linings look yellow like Kevlar.


Top of pagePrevious messageNext messageBottom of page Link to this message  By john kuehn on Tuesday, July 15, 2014 - 03:12 pm:

I don't think that the groove was caused by a rivet.
It is suspicious because it looks fairly deep.

Could it be that the drum is starting to develop a uniform split or crack? Or maybe because the way the lighting or shadow effect causes it to look deeper than it really is?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Steve Tomaso - Milton,WA on Tuesday, July 15, 2014 - 05:52 pm:

James,

Perhaps backing off the low pedal adjustment and removing the spring would clearly show the surface of the low drum and what you are describing as a "groove" ? Or, are you mistakenly referring to a "groove" as the driven plate to brake drum parting line ?


Top of pagePrevious messageNext messageBottom of page Link to this message  By James Chochole on Tuesday, July 15, 2014 - 07:37 pm:

Yes, my "groove" is the gap between the plate and brake drum. So all is well, case closed. Thanks to all.


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