New owner - have questions

brian mallett

New member
Jun 22, 2018
4
0
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Ok... I'll try to keep this somewhat concise. I've never owned a motorhome before but I've always loved the look of the GMCs. My wife found one a
couple of hours away and she really liked it. I had to take advantage of that aspect. ;)

It's a 1976 Birchaven. VIN # in my sig and here:

Here are the options:

Here are a couple of photos...

We picked her up for $3,000. I felt that was a pretty solid deal for one in this shape. She needs some love for sure, but she runs well and is fairly
solid.

I've done the basics. I've rebuilt a few old cars in my time and I always go through the same process when I get one. Filters, plugs, oil, fluids,
brakes, grease points, bulbs, and wipers. I'm still working on that part. We just got her and drove her home 3 hours this week.

I flushed the a/c lines, ripped off the dryer and expansion valve, flushed the condenser, replaced the dryer and EV, then loaded her up with fresh
freon. I now have air. That's a must in Oklahoma. I'm glad I did to because it was nasty. I've never seen this color come out of a condenser. I got it
to flush clear though and had good flow so I kept it.

The two vents under the dash blow fairly strong, but the other main dash vents and vents by the seats barely have anything coming out. Is this normal?
If not, what would be something to look for?

My other questions are more related to what all I might be missing or what all has been changed. There is only one battery in the passenger side
that's bungee strapped to a piece of plywood. I would think that I would have dual batteries. There is also a wire disconnected from what appears to
be an isolator on that side. Does anyone have pictures of how this should look?

Shore power seems to function well. But the generator just spun and finally blew a breaker that shore power was plugged into. Without shore power I
was not able to lock over the onan. I got to looking at it more closely and it appears the starter is bad. It kicks out but doesn't spin. I manually
cranked the generator with a ratchet and it had good compression and cranked freely so I think a starter should do the trick. How do I find a
replacement starter? The starter has no numbers. The onan does, but I am new with generators.

Lastly, for now, there are two bare wires, they look cuthanging down below the generator. I would assume that the generator would feed one or more
cabin batteries, but I don't see any anywhere. Where would a cabin battery be located? Also, what size batteries do I need?

Any and all information is appreciated. Thanks guys.

--
She needed love and we want to give it to her.
TZE336V102714 - 1976 23' Birchaven
 
hey bmallett, that is the kinda deal I wanna find right there! wow! how many miles?

great photos youve posted. really shows the inside well. nice layout in that one! looks like a previous owner did the engine room vents so probably
has some other cool mods to eh?

best of luck with it!
 
Well Congratulations on the find. The Birchaven is a 23 foot coach that was upfitted by Coachman rather than GM. So because of that some things are
a little different and some things are in different places the 26 foot GM upfitted ones. There are several very knowledgeable people here with
Birchavens so I'll let them comment where things are like the location and types of batteries.

On the starter,
My local generator, starter, and alternator repair shop has all of the parts to rebuild that Onan starter in stock. So I would suggest that you try
to find a local rebuild shop. If you strike out there, then Applied GMC has new and I believe rebuilt Onan starters.

Also it is very common for these to break the starter mounting bracket. I see you already have yours out so check the bracket and bendix gear. New
heavier brackets are available from Applied GMC.

http://www.appliedgmc.com/

http://www.appliedgmc.com/prod.itml/icOid/928

That mess that you found in your AC system really bothers me. It is good that you flushed it. I'm thinking that someone in the past mixed oil types
(Mineral, PAG, Ester). So I hope that you completely flushed and drained everything including the compressor. Then on recharge that you used the oil
to match the refrigerant the you charged it with. Most of us these days use Duracool or frosty cool and ester or mineral oil.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Brian,

Congratulations on your find, and welcome to the GMC community.

I'm one of those with 20+ years of X-Birchaven experience. I say "X-"
because after purchasing mine, I "totalled" the engine after 875 of the 950
miles toward home. Before I got that fixed, SHE informed me that SHE
wasn't about to sleep in that "migrant's hovel". So, I completely gutted
it and started over with a complete new interior:
http://www.gmcmhphotos.com/photos/g3055-our-x-birchaven.html

There have since been major changes to that interior, and almost everything
mechanical has been changed at least once -- mostly more -- during the
150,000 miles or so we've put on it, covering the US from Key West, FL to
Fairbanks, AK.

You've got a steep learning curve ahead of you, despite your obviously
mechanically complete background. But, there's a biblical flood of
information available. One place to start is at the web site I referenced
above -- tens of thousands of exclusively GMCMH photos to view, covering
'most anything you might need to learn about. Another is www.bdub.net.
There, you'll find all of the many factory service manuals covering the
basic coach and the many accessories used over the years in various
models. There are also links to all of the various GMC vendors, repair
shops, and to the essential GMC-dedicated clubs. Of special interest is
GMC Motorhomes International, GMCMI, which has members from, literally,
around the world. A convention, held somewhere in the country twice per
year, is a "must attend". You're lucky in that the next one will be held
in Amana, IA in September. You'll find details of that, and much more at
GMCMI.com. Hope we'll get to meet you there.

This is long enough, so I won't yet go into the answers to your various
questions -- you've got plenty of references to keep you busy anyway. :-)

Ken H. -- USAF Ret.
Americus, GA
'76 X-Birchaven
Manny Brakes & 1-Ton, Troy-Bilt APU,
Cad 500, etc., etc., etc.
www.gmcwipersetc.com

>
>
 
Congrats and welcome-

http://www.ragusarv.com/
ragusa has a lot of custom doodads just for gmcs, including a battery tray to get rid of your plywood

billy massey's composite page
http://www.bdub.net/GMCLinks.html
will keep you reading for months. first things you need off it is a copy of the Blacklist (volunteers all over who will help you in a pinch) and a
copy of the service and owners manuals. even the coachmen upfit manuals are there if you dig down enough links

one thing I wish I knew when i started five years ago was the fact that early steel wheels were not radial rated. I bought a full set of 16.5
Firestone's and later learned my wheels were not intended for radial tires. I have been fine, but age and design dictate I'll be moving to 16 inch
wheels as those tires age. And, five years is about the max you want on tire age. These composite bodies tear out a whole more dollars of damage when
a tire blows than a good tire costs.

enjoy!
--
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
 
Welcome and great find!!!
Your gonna love it. But expect some hiccups here and there. Join a local GMC club, it's a great community.
I'm impressed that your able to get pictures on the forum. I still can't do that!!
Fave fun!
Scott.
--
Scott Nutter
1978 Royale Center Kitchen, Patterson 455, switch pitch tranny, 3.21 final drive, Quad bags, tankless water heater, everything Lenzi. Alex Ferrera
installed MSD Atomic EFI
Houston, Texas
 
Keep in mind when you're asking questions. And the answers you get. That you have a GMC that the interior that was built by Coachman Industries. Not GM. If the engine hasn't had the timing cam gear/chain changed. That plastic/aluminum original gear will start at some time start to come apart. And take our the main/rod bearings. That plastic is 42 years old. Bob Dunahugh 78 Royale
 
Welcome aboard! I, like you, have not had a motorhome before, but have lots of "car experience", and a lot of that is transferable. I have found
this forum and the "photo" website to be invaluable. The Facebook stuff, while a good time-waster is not so good for technical info. You can find
answers to most any issue you might have on this site. Many here have done most anything imaginable to these coaches and several have done more than
once!
As a new owner you've already started assessing the maintenance needs. I'd suggest strongly that you closely assess anything made of rubber. Tires,
belts, hoses, brake hoses and oil cooler hoses are the biggies. If OE, the oil cooler hoses are a fiber reinforced rubber and if they rupture, it
will get ugly very quickly. All this rubber stuff can be old and fragile. Fortunately everything is still available. Prioritize making your coach
safe first - all the running gear stuff, then you can work on house stuff; plumbing, electrical, generator. Lastly work on cosmetics.
Again welcome aboard and don't be afraid to ask questions.
--
Chris Geils - Twin Cities
1978 26' Kingsley w/ very few mods; Headers, Progressive Dynamics 9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, 50k mi
 
First off, thank you all for the kind words and welcoming. It's nice to see such great people involved. I have most of the links that you all have
referenced saved already. I tried to do most of my homework before asking. I really wanted to make sure that there weren't little "secrets" I need to
know about prior to getting going.

Matt,
I'll change up my signature to include the rest of that info ASAP.

Finding out that it was dressed by Coachmen was new though. That's interesting. Was it just the 23 footers?

I'll definitely be printing out and binding the manuals.

@mrgmc3,
I agree and ALWAYS go through the mechanical first. The only concern I have is with the electrical. I've heard of some bad accidents waiting to happen
and definitely don't want to have one of those. ;)

@bdub,
I think I have spent most of my time on your site thus far, getting references, links, etc. Thanks for the great resources.

Ken,
Your transformation is beautiful. I like it a lot. Eventually, I would like to hand her over to my cousin and have him paint her. How is custom paint
looked upon on here? I like the 70's look and feel and will probably want to keep her that way, but there is a nice wall section that would be perfect
for a 70's theme mural. :)

If anyone has any more information they can provide from the options list or VIN, I would greatly appreciate it. It's all a little overwhelming right
now so excuse the redundancy of questions or silly questions if they come.

Thanks again for the great welcome and info.
Brian
--
She needed love and we want to give it to her.
TZE336V102714 - 1976 23' Birchaven
 
Brian

First....Welcome...

If you look at Matt Colie's second paragraph. and his sigfile or Scott
Nutter's sigfile you'll get some ideas...thanks

Mike in NS

> First off, thank you all for the kind words and welcoming. It's nice to
> see such great people involved. I have most of the links that you all have
> referenced saved already. I tried to do most of my homework before asking.
> I really wanted to make sure that there weren't little "secrets" I need to
> know about prior to getting going.
>
> Matt,
> I'll change up my signature to include the rest of that info ASAP.
>
> Finding out that it was dressed by Coachmen was new though. That's
> interesting. Was it just the 23 footers?
>
> I'll definitely be printing out and binding the manuals.
>
> @mrgmc3,
> I agree and ALWAYS go through the mechanical first. The only concern I
> have is with the electrical. I've heard of some bad accidents waiting to
> happen
> and definitely don't want to have one of those. ;)
>
> @bdub,
> I think I have spent most of my time on your site thus far, getting
> references, links, etc. Thanks for the great resources.
>
> Ken,
> Your transformation is beautiful. I like it a lot. Eventually, I would
> like to hand her over to my cousin and have him paint her. How is custom
> paint
> looked upon on here? I like the 70's look and feel and will probably want
> to keep her that way, but there is a nice wall section that would be perfect
> for a 70's theme mural. :)
>
> If anyone has any more information they can provide from the options list
> or VIN, I would greatly appreciate it. It's all a little overwhelming right
> now so excuse the redundancy of questions or silly questions if they come.
>
> Thanks again for the great welcome and info.
> Brian
> --
> She needed love and we want to give it to her.
> TZE336V102714 - 1976 23' Birchaven
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS

Life is too short to hold a grudge; slash some tires and call it even !
 
Check to see if you have an APC (alternator protection cable). If you
don't and for some reason your alternator starts to over charge you will
burn up your dash wires.

http://www.appliedgmc.com/prod.itml/icOid/557

On Fri, Jun 22, 2018 at 3:31 PM, Kingsley Coach
wrote:

> Brian
>
> First....Welcome...
>
> If you look at Matt Colie's second paragraph. and his sigfile or Scott
> Nutter's sigfile you'll get some ideas...thanks
>
> Mike in NS
>

>
> > First off, thank you all for the kind words and welcoming. It's nice to
> > see such great people involved. I have most of the links that you all
> have
> > referenced saved already. I tried to do most of my homework before
> asking.
> > I really wanted to make sure that there weren't little "secrets" I need
> to
> > know about prior to getting going.
> >
> > Matt,
> > I'll change up my signature to include the rest of that info ASAP.
> >
> > Finding out that it was dressed by Coachmen was new though. That's
> > interesting. Was it just the 23 footers?
> >
> > I'll definitely be printing out and binding the manuals.
> >
> > @mrgmc3,
> > I agree and ALWAYS go through the mechanical first. The only concern I
> > have is with the electrical. I've heard of some bad accidents waiting to
> > happen
> > and definitely don't want to have one of those. ;)
> >
> > @bdub,
> > I think I have spent most of my time on your site thus far, getting
> > references, links, etc. Thanks for the great resources.
> >
> > Ken,
> > Your transformation is beautiful. I like it a lot. Eventually, I would
> > like to hand her over to my cousin and have him paint her. How is custom
> > paint
> > looked upon on here? I like the 70's look and feel and will probably want
> > to keep her that way, but there is a nice wall section that would be
> perfect
> > for a 70's theme mural. :)
> >
> > If anyone has any more information they can provide from the options list
> > or VIN, I would greatly appreciate it. It's all a little overwhelming
> right
> > now so excuse the redundancy of questions or silly questions if they
> come.
> >
> > Thanks again for the great welcome and info.
> > Brian
> > --
> > She needed love and we want to give it to her.
> > TZE336V102714 - 1976 23' Birchaven
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
>
>
>
> --
> Michael Beaton
> 1977 Kingsley 26-11
> 1977 Eleganza II 26-3
> Antigonish, NS
>
> Life is too short to hold a grudge; slash some tires and call it even !
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
 
> Finding out that it was dressed by Coachmen was new though. That's interesting. Was it just the 23 footers?
>
> @mrgmc3,
> The only concern I have is with the electrical. I've heard of some bad accidents waiting to happen and definitely don't want to have one of those.
> ;)
>
> @bdub,
> I think I have spent most of my time on your site thus far, getting references, links, etc.
>
> How is custom paint looked upon on here?
>
> Brian

In order;
In 73-74 the 23 footers (and 26) were all "GMC", that is the interiors were all done by GMs designated supplier Gemini. Beginning in '75 GM sold
what they called a Transmode. The Transmode was a complete mechanical vehicle but basically an empty van. Other RV upfitters such as Coachman added
interiors, plumbing, house electrical etc. Transmodes were also sold for upfit for non-RV use (shuttle buses, ambulances, mobile offices, etc). GMC
continued to outfit 26 footers in 75-78, but the 23 footers were all Transmodes. Coachman was easily the most popular upfit with both 23 ft Birchaven
an 26 ft Royale.

Electrical - the electrical integrity of both GM and Coachman upfits is pretty good. The real challenge lies in the modifications that may have been
attempted in the intervening 40 years. Search and you'll find some interesting stories. Also there is general agreement that the "APC" - alternator
protection cable is a good idea, some will say "absolute must" - it's a bypass fuse that will provide a parallel path to a fusible link that, if it
melts, could lead to a dash fire. (I have one on my GMC)

bdub.net - the best seven letters in GMC land, because Billy has links to everything!

Custom paint - you'll find everything here from stock to custom and I don't think you'll find strong agreement one way or the other.
--
Chris Geils - Twin Cities / W Wa
1978 26' Kingsley w/ very few mods; Headers, PD9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, Alcoas, 50k mi
 
Coachman built Burchavens as 23 ft. And the Royales as 26 ft. They were quite expensive at the time. Our 78 Royale rear bath cost $48,400. new. Had a lot of options. Royales have solid walnut woodwork. Bob Dunahugh

________________________________
From: Bob Dunahugh
Sent: Friday, June 22, 2018 9:44 AM
To: gmclist
Subject: RE: New owner - have questions

Keep in mind when you're asking questions. And the answers you get. That you have a GMC that the interior that was built by Coachman Industries. Not GM. If the engine hasn't had the timing cam gear/chain changed. That plastic/aluminum original gear will start at some time start to come apart. And take our the main/rod bearings. That plastic is 42 years old. Bob Dunahugh 78 Royale
 
Chris,

One correction about the APC's function: It does not bypass anything.
Rather, it is a 6A 600 VDC diode in series with the Nichrome wire, which
acts as the dropping resistor for the initial excitation current for the
alternator. Its function is to prevent high voltage feedback from the
alternator which can cause the wire to glow red hot. The fusible link is
not involved at all.

Just don't want a misconception to spread.

Ken H.

On Sat, Jun 23, 2018 at 12:29 AM Chris Geils via Gmclist <

> > Finding out that it was dressed by Coachmen was new though. That's
> interesting. Was it just the 23 footers?
> >
> > @mrgmc3,
> > The only concern I have is with the electrical. I've heard of some bad
> accidents waiting to happen and definitely don't want to have one of those.
> > ;)
> >
> > @bdub,
> > I think I have spent most of my time on your site thus far, getting
> references, links, etc.
> >
> > How is custom paint looked upon on here?
> >
> > Brian
>
>
> In order;
> In 73-74 the 23 footers (and 26) were all "GMC", that is the interiors
> were all done by GMs designated supplier Gemini. Beginning in '75 GM sold
> what they called a Transmode. The Transmode was a complete mechanical
> vehicle but basically an empty van. Other RV upfitters such as Coachman
> added
> interiors, plumbing, house electrical etc. Transmodes were also sold for
> upfit for non-RV use (shuttle buses, ambulances, mobile offices, etc). GMC
> continued to outfit 26 footers in 75-78, but the 23 footers were all
> Transmodes. Coachman was easily the most popular upfit with both 23 ft
> Birchaven
> an 26 ft Royale.
>
> Electrical - the electrical integrity of both GM and Coachman upfits is
> pretty good. The real challenge lies in the modifications that may have
> been
> attempted in the intervening 40 years. Search and you'll find some
> interesting stories. Also there is general agreement that the "APC" -
> alternator
> protection cable is a good idea, some will say "absolute must" - it's a
> bypass fuse that will provide a parallel path to a fusible link that, if it
> melts, could lead to a dash fire. (I have one on my GMC)
>
> bdub.net - the best seven letters in GMC land, because Billy has links to
> everything!
>
> Custom paint - you'll find everything here from stock to custom and I
> don't think you'll find strong agreement one way or the other.
> --
> Chris Geils - Twin Cities / W Wa
> 1978 26' Kingsley w/ very few mods; Headers, PD9040, aux trans cooler,
> one repaint in stock colors, R134a, Al rad, Alcoas, 50k mi
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>