The Stovebolt Site Forums The Shop Area Driveline Brake drum Paper Gasket?

I see that there was some kind of paper gasket or spacer between my brake drums and the hub on the rear of my 1950 3600. There are just a few pieces of it remaining, some adheres to the drum and some to the hub. What is the purpose of this paper and how important is it? If it is important, what should I make replacements from? Thanks for any helpful comments.

not a spacer or shim, just a bit of oiled paper to help avoid parts seizing together, not necessary, but you could replace it with a piece of butcher paper or brown paper bag if you're shooting for 'original'

Bill

Here is an example

...link...

The paper is actually a gasket designed to keep oil from leaking out to the shoes.
If you look at the back side of the axle flange you will see an oil catcher trough. There is also a hole through the flange inline with this trough. If oil leaks from the axle seal the trough will catch it and direct it through the hole in the flange through a matching hole in the drum and on to the back side of the wheel. Without the gasket oil will seep out between the flange and drum and onto the shoes.

Thanks for that information and explanation

If you use a gasket do you punch a clearance hole for the trough?

Are you referring to the 3600 Dave or 3100?? The HO52/72 were
free floating and should be sealed with the metal seal at the
flange to hub.

DG

Sorry, I guess I need to pay closer attention. I was referring to 3100 and cars. I do not see a need on a full floating set-up.

Dads50, the gasket needs a hole in it where the transfer hole in the axle and drum is located.

Chevy 3/4 ton
Brake Drum Gasket

photo@photobucket

http://i669.photobucket.com/albums/...0_/BrakeDrumGasketsGMNOS_zps560f1c62.jpg

I don't do much work on anything larger than 1/2 tons, but it looks like the 3600 has a similar setup to keep oil or grease off the brakes, at least on the front(pictured).

A rear hub (or, rear drum) gasket was used/available for 3100-3800 trucks through at least the Task Force (Blue Chip) years. It is not referred to in Shop Manuals but is listed in parts catalogs.

Just trying to get the correct information out here but those
gaskets that you have pictured wouldn't do a thing to keep
hypoid grease from getting to the brake drums. This free
floating hub is machined from one single billet with a metal
seal where the axle flange bolts up and an lip seal behind the
flange where the wheel bolts up:
http://www.pbase.com/dennygraham/image/114877920/large
I truly think the thin paper gaskets are just what was mentioned
earlier, simply to keep the drum from bonding with the flange
due to rust. You can use them or not. For a trailer queen who
would never get her feet wet, I don't see any need for them.


Addendum: Where did you see that in the parts book
Tim, I can't find it in the 1929-54 book?
DG

In looking at your pic Denny it looks like it has an oil transfer hole in the flange like 1/2 tons.
Is there not a tin shield on the back side of the hub, held on by the studs, to collect any oil that happens to leak past the seal and direct it through the hub and drum and out to the back of wheel?
The parts book calls it a Deflector, group 5.815.
In looking at my parts book it looks like the basic design is the same as I described above for cars and 1/2 tons.

Thanks for all the responses! They are cheap enough but I will probably make something since if I can put the brake drums on tomorrow, I can take the truck off the jack stands by Monday and I am getting impatient.

Been eight or nine years since I've had them off Dave,
but I think you're correct, there is an oil deflector
on the back side of the rear hub now that I think
about it. I'm need to pull them off soon and check
things out pretty soon 'cause I'm getting some oil
showing on the wheels. I'm pretty sure I didn't use
the gaskets when I rebuilt them in '05-'06.
The path for the elimination of oil or grease is sort of
deceptive. So........I stand corrected, it looks like the thin
gaskets are, indeed necessary, front and rear, 3100 and 3600.

DG

Here's the paper gasket as found on my 54
http://i1078.photobucket.com/albums...3-417A-AD5D-1507BAFD97D4_zpskgaqjexj.jpg

Awww,geez! I had one all apart last year, it was a total mess and rebuilt everything...with the exception of this diflector & gasket. This is the first I have heard about it an dnow I've got to go back and tear it all apart again to make it right.
I pays to read every thread on this site, thank you oj

I always heard it "you can tell what kind of job you have by whether you wash your hands before or after you pee".

Well...I guess I too messed up in redoing my '46 project. These paper gaskets were also in place on the old parts. It never occurred to me these were needed. Guess I better get into rework mode. Oh dirty word dirty word!!!!! !