Airpack Compensator cup seal replacement

[cbvet]

Working on my first airpack rebuild.
TM says to replace cup seal & felt washer on compensator.
Kit I got doesn't have the 1.5" OD cup seal, & the strip of felt is about 2.5" long, but the old one is 4".
Dealer I got the kit from says it's the common kit for a "long" airpack, that he sells a lot of.
Does anyone recall whether the kits they've gotten have had those seals?

 

[caliber1]

Don't remember where I got my kit from, but even "4 sounds short, and I had both cup seals, they had different ID holes in them I think.

 

[cbvet]

I'm talking about the brass compensator valve in the slave cylinder part of the airpack.
It only has the one cup seal & felt "washer".

 

[ducer]

I would call a different vendor and see what is contained in their kit. If their kit contains the necessary parts then hold the company you bought from over the fire to get the necessary correct parts. By any chance do you have this truck parked at the VFW on Heaton street in Knox sonetimes? I live in Ober on 23.

Denny

 

[cranetruck]

Any self respecting repair kit should come with a list of its content, I know mine did, but that was 12 years ago. Got it from Memphis. Here is a picture that I believe applies (from your description).

It is possible that the parts of the slave cylinder simply stick from non-use and lack of lubrication, so all you need to do is clean and re-assemble (without installing new seals etc).

 

[cbvet]

Yup, that's the compensator with seals.
I sent the dealer pictures & TM pages. He is sending the missing parts ASAP.
He looked through the kits he has on hand, and they all have the seals I'm missing included.
When I originally opened the package, it was on a 2" deep tray, so I'm sure I didn't lose anything.
Anyway, parts are on the way.
Thanks for the replies!

 

[cbvet]

Got the rest of my air pack parts, but I have 3 items left!
1-Snap ring which I saw no use for.
2- O ring which some drawings show possibly installed on the shaft bushing & some don't. I left it out because my air pack didn't have one when I took it apart, & I really couldn't see what purpose it would serve. I thought the drawing might be referring to the thin O ring that goes between the slave cylinder & the gasket. Thin O ring isn't shown in any of the deawings I've seen.
3. Cup seal. Nothing like it in my air pack.

Looking at the drawing in Bjorn's MVM magazine, there are some differences in my air pack from the one shown.

Anybody know what these "extra" parts are for?

 

[cbvet]

For some reason I can't attach picture.
Snap ring is about 1.75 diameter.
O ring is about 1.5 diameter.
Cup seal is about .75 diameter.

 

[cbvet]

Picture

 

[cbvet]

I went ahead & put airpack in truck. Only had time for a.short drive, but brakes work great!

 

[caliber1]

O-ring looks like the one between the air can and the cast housing. Don't remember a snap ring in mine, or that small cup seal.

 

[peashooter]

Just saw this thread while I was looking for something else. In case anyone else stumbles across this thread because they have the left over cup seal shown also, it is for the piston push rod bushing assembly. Here is the rebuild TM courtesy of Rustystud: http://www.steelsoldiers.com/showth...build-Manual&p=1484182&viewfull=1#post1484182