Got lucky today bougha AMMCO 1750

[Ken Bartz]

I got lucky today and found a AMMCO 1750 Brake Gage at a dealership auction. I had to buy 9 boxes of other stuff to get it. I found the instructions and a photo of a complete kit that someone had earlier posted on this forum. I am missing pieces, the round item that is used find the diameter of the brake drum (with a notch at one end and three holes). This round shaft, I think, has three holes in it so find the diameter of 10, 11 and 12 inch diameter brake drums. Could I make this if I had the measurements? .......Also another round shaft of which I do not know the use of. (any help?) Then there should be a spacer for mounting the tool on the axle. (according to the instructions).........AND a donut shaped piece which I also do not know its use. (more help?) The dial has readings of 0, 10, 20 to 125. Is this .010" increments? Can someone fill in my missing knowledge of this tool?

[blueskies]

Ken-

Here's some info on the pin for you, and the parts that should be in the Ammco set-

Hit reload if the pics don't show...

This is a pic of all the parts-

And here's the dimensions for the missing pin-

I did this drawing for another guy who's Ammco set was missing the same pin. He was able to have a machine shop fab the pin from this drawing, and it worked fine.

The extension pin, which is the one that has a tapered end, is to extend the dial indicator pin for applications other than your car, so I don't think you'll need it.

The adapter ring, or "doughnut", is a spacer that seats the ammco tool on the spindle, and you probably will need one. Here's a pic of the tool on my front brakes. You can see the adapter ring at the base of the tool on the spindle. I can measure this for you too, if you need me to.

Here's the instructions if you don't already have them:

Pete

[Ken Bartz]

Pete, Thank you very much for this helpful information. I could not believe it when I looked in this box at the auction and saw the gage. I looked through all nine boxes that I had to buy to see if the parts were there, not so. This information will be very helpful. The spacer dimensions would also be helpful, at least the thickness. Now I will be able to correctly adjust the brakes on my 3 Plymouths. Ken

[bkahler]

Pete,

I have a question for you on the drawing you made of the pin.

The dimensions listed on the drawing show .512" between holes on the pin. Yet in the paragraph below the drawing you stated that the holes were 1/2" apart. In my attempt to analyze the situation it would seem that 1/2" is the correct number. Yet you were pretty clear in listing the dimensions as .512" as well.

So which is it

By the way thanks for taking the time to post the above drawing. I managed to buy one of the 1750 tools on eBay but of course it didn't have the pin. Knowing you had provided the information is what made it worth while for me to try and get it.

Thanks!

Brad

[greg g]

What else didja get???

[bkahler]

What else didja get???

It was missing the pin mentioned above, the extension pin and the spacer. It does have the collar.

Brad

[greg g]

I meant in the other 8 boxes.

[bkahler]

I meant in the other 8 boxes.

Oh sorry, that was Ken that got the other boxes.

[blueskies]

Pete,

I have a question for you on the drawing you made of the pin.

The dimensions listed on the drawing show .512" between holes on the pin. Yet in the paragraph below the drawing you stated that the holes were 1/2" apart. In my attempt to analyze the situation it would seem that 1/2" is the correct number. Yet you were pretty clear in listing the dimensions as .512" as well.

So which is it

Brad

Brad-

My pin measured .512" between the holes with my micrometer. But that is only 1/64" over 1/2", so I probably rounded it off...

I don't think the 1/64" will make any difference the way the tool works.

Pete

[bkahler]

Brad-

My pin measured .512" between the holes with my micrometer. But that is only 1/64" over 1/2", so I probably rounded it off...

I don't think the 1/64" will make any difference the way the tool works.

Pete

Sounds good. I'll fax your diagram over to my machine shop and have them build me one.

Thanks!

Brad

[1948Skip]

I think I would opt to keeping the three holes at .500 apart. This way you do not wind up with a .024 error in drum measuring. .024 will mean you will not get your drum on because the brake lining will be to far extended.

Skip

[bkahler]

I got to thinking about the fact that I bought this tool to use on my 1/2 ton dodge pickup and realized I didn't really need the holes for the 11" and 12" drums. So after looking closely at Pete's drawing and reading the instructions he provided as well, I figured the easiest way to make the pin would be to set the micrometer dial at "0" and then make my pin such that with the slide caliper set to 10" it just fit.

So with that in mind I set about making a pin today. Since I'm on a temporary work assignment away from home I had to scrounge tools to get the job done. I ended up using a cordless drill, hacksaw, flat file, 24" caliper and 4" hand grinder to make it.

I didn't realize that a 5/8" cold rolled steel bar was actually slightly over sized. So I had to file the diameter down slightly to get it to fit into the hole. Other than that I didn't really have any problems.

http://www.141.com/dodge/photos/ammco-pin-1.JPG

http://www.141.com/dodge/photos/ammco-pin-2.JPG

http://www.141.com/dodge/photos/ammco-pin-3.JPG

http://www.141.com/dodge/photos/ammco-pin-4.JPG

I went ahead and added the holes for the 11" and 12" drums just in case. They aren't in absolute perfect alignment but they should be close enough to work.

I'll be home over labor day and hope to find out whether my fabrication job will work .

Brad