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bmh
05-13-2009, 07:36 PM
Rooster posted this photo on a different thread the other day and something caught my eye by the cover dowel.

http://i613.photobucket.com/albums/tt220/brianhoward/Base20Nuts202.jpg

I recognized the marks right away because my sand cast gear cover for my 51 has similar marks, though in a slightly different location.

http://i613.photobucket.com/albums/tt220/brianhoward/100_2767.jpg

If I had never seen the photo Rooster posted I would've continued to assume these marks were from some one having the cover clamped in their bench vise for some type of repair and would have blended them out. Now I will not only leave them, but do whatever I can to preserve them. It's amazing what you can learn from one photo. So I was wondering how many others have seen similar marks on parts? I guess they were left by the clamps at the milling machine when the screw holes were counter sunk. I wouldn't have thought something like this would pass quality control, Guess I was wrong.
Rooster
05-13-2009, 09:44 PM
That's very interesting, bmh. Good eye. And for the record, I need to report that the photos I posted are copies of 1952 factory photos that I got from Chris Haynes. I cannot take credit for the photos, rather we can thank Chris!
c.o.
05-13-2009, 10:47 PM
That is super interesting Brian! I just had to run out to the shop and check out a cover I had hanging on the wall. But, alas I had forgotten that somewhere in it's lifespan somebody decided to start a modification! Any theories behind why someone would start grinding like that? Besides the obvious I guess, maybe they wanted the smoother version? Sorry to sidetrack the original point to this thread.....

http://i541.photobucket.com/albums/gg390/buckboard_2009/Gearcover002.jpg
23JDCA 808
05-14-2009, 07:37 AM
That looks like it has been whacked, really hard or multiple times with a hammer. ...bill
T. Cotten
05-14-2009, 08:02 AM
A similar fixture mark can be found on a great many muffler body clamps, and can show up on just about anything.

....Cotten
Robert Luland
05-14-2009, 04:02 PM
That is super interesting Brian! I just had to run out to the shop and check out a cover I had hanging on the wall. But, alas I had forgotten that somewhere in it's lifespan somebody decided to start a modification! Any theories behind why someone would start grinding like that? Besides the obvious I guess, maybe they wanted the smoother version? Sorry to sidetrack the original point to this thread.....

http://i541.photobucket.com/albums/gg390/buckboard_2009/Gearcover002.jpg

Probly to keep a loose brake peddle from rubbing against it.
c.o.
05-14-2009, 06:25 PM
You could be onto something there Robert..... which makes me wonder why wouldn't the dolt fix the brake pedal? Just a thought......
Paps
05-14-2009, 07:33 PM
Cause he welded to the pivot crooked.
T. Cotten
05-14-2009, 08:05 PM
You could be onto something there Robert..... which makes me wonder why wouldn't the dolt fix the brake pedal? Just a thought......

People fall down on them.
It happened a lot, and still does.

...Cotten
c.o.
05-14-2009, 10:54 PM
Cotton, you make things so damn obvious! After you said it, I thought to myself....."why didn't I think of that"? Now that cover has a story!
JSB55
06-09-2009, 12:05 AM
Returning to the original point of this thread, I found that same tool mark on my cam cover, skid plate, and the the foot shift support bracket when recently tearing down my 65 FLH.

Having seen Rooster's original post and the related comments of others there and here, I took those marks as evidence the parts in question were factory originals. Now I'd be glad to find more as I clean things up and reassemble!
Chris Haynes
06-09-2009, 03:20 PM
That is super interesting Brian! I just had to run out to the shop and check out a cover I had hanging on the wall. But, alas I had forgotten that somewhere in it's lifespan somebody decided to start a modification! Any theories behind why someone would start grinding like that? Besides the obvious I guess, maybe they wanted the smoother version? Sorry to sidetrack the original point to this thread.....

http://i541.photobucket.com/albums/gg390/buckboard_2009/Gearcover002.jpg

That cover couldn't be run with that hole in the oil passage.
Rooster
06-09-2009, 05:05 PM
That cover couldn't be run with that hole in the oil passage.

Sure it could. Just not for very far. :)
c.o.
06-11-2009, 12:07 AM
Chris........I guess that's why I paid five bucks for it at a meet a few years back. It's art for now but could be repaired and put back into service one day.....:D
panz4ever
06-12-2009, 10:38 AM
Tool marks that was on one of my muffler clamps. Got to looking after Tom Cotton's post.
bmh
06-13-2009, 05:22 AM
I've also found the same marks on my left crankcase.
fabercycle
06-23-2009, 03:32 PM
Anyone who has ever worked in Tool & Die, building progressive dies will recognize those as "gripper buttons", a common hardened insert in tooling to keep the part from moving when you stamp it. I've never seen it used in fixtures for holding castings though.....but not a bad idea.