76 GMC Birchaven rear suspension

Matt Colie

Well-known member
Aug 15, 2008
11,101
807
113
South East Michigan near DTW
> Hi everybody and forgive me if I am posting this in the wrong section :? My wife and I bought a 1976 Birchaven over the weekend. We are already
> in love with it, but she still needs some work done before her first voyage.
> The main issue right now is the rear suspension. both compressors engaged yesterday and she was raising up nicely. The we blew a fuse in the dash
> fuse box. We replaced the fuse and now the compressor engages and runs but won't lift it ant higher.
> is there a auxiliary Schrader valve I can connect my external Air Compressor To? I have searched all over the Van and can not see a valve.
> Any help or suggestions would be greatly appreciated!!
> Thank you,
> I love the site!!

Duck,

You are in the right place.

Welcome to the group, family, cult, asylum.....

We will all be at a loss. You seem to be describing a suspension that we would call Electro-Level 2. A 76 Birch should be Electro-Level (1). As OE,
there is no schrader anyplace, but many do add such. At the airspring (bag) feed they add a T, a valve and a schrader. You can do this on your own
or buy a kit from Applied GMC.
If it is an EL2 and you need a new airpump, hang on. Those were a Cadillac part and they are very proud of them.....

There is a world of technical stuff that can be downloaded at GMCMI.COM. If you have not looked there, start now.

You will get a lot of value out of this group, but we need your help. It looks like you are working the Forum, so go up to . Scroll down, if you see but there isn't much, click on the PLUS. Now scroll down to the Signature Box.. Please fill that in
with your real name (we like to know who you are when we are helping your or we meet), a short about the coach including major mods (some, like EL2,
might matter a lot) and a geographic reference. By arriving here, you just collected a huge number of old friends and one might be close enough to
help.

Birchhavens were TZE chassis 23' that were fitout by Coachmen. As such, the documentation is often sketchy. We have several owners here that will
know much more about this than I do. One should be along any moment now. Be patient.

One more thing, your Birchaven is more than just a big new toy. Being a GMC owner connects you to a community that is just full of people that are
eager to see that you get to enjoy your coach as much as we know you can. They are massively helping and supportive people. It is a truly awesome
thing. I am going to refrain for stories right now, but you will get to hear some I am sure. The only other community that I know of that is this
supportive is that of the watermen that are my world. For that reason, I like to welcome a new owner here much as one might be there. So,

May the Good Lord bless this coach and all those that set forth within her.

Welcome (Duck?)

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
 
A 76 with two compressors? This does not compute. Does is it have a small air tank (about 1 quart) mounted near the compressor(s)? To my knowledge
dual compressors (one per side) with no air tank were not introduced until 1978.

If you have a tank, you could unscrew the drain valve and install a schrader there. Otherwise you could unscrew the 2 air lines at the bags and
install two schraders direct into the two airbags.

I assume that your long term goal will be to restore your coach to an operational air system.

1/4" and 1/8" schraders are available from your local Ace hardware for a couple of dollars each. Look around the area of the store with brass
fittings. The 3 local Ace and one True Value stores here all have them.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
There is a shredder valve on top of the head on the 78 compressors

On Mon, Jul 22, 2019 at 8:53 PM Ken Burton via Gmclist <

> A 76 with two compressors? This does not compute. Does is it have a
> small air tank (about 1 quart) mounted near the compressor(s)? To my
> knowledge
> dual compressors (one per side) with no air tank were not introduced until
> 1978.
>
> If you have a tank, you could unscrew the drain valve and install a
> schrader there. Otherwise you could unscrew the 2 air lines at the bags and
> install two schraders direct into the two airbags.
>
> I assume that your long term goal will be to restore your coach to an
> operational air system.
>
> 1/4" and 1/8" schraders are available from your local Ace hardware for a
> couple of dollars each. Look around the area of the store with brass
> fittings. The 3 local Ace and one True Value stores here all have them.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502