Newly installed VIAIR 400C compressor

Jim,

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

You are probably sitting there going Geez, I ask one little question and answers just pour off the wire.....

Well Guess What, That is what GMCnet is all about. Not only that you got answers here from three electrics people that provide "take it to the bank
answers. That be KenH, KenB and Johnny. All of them know the score and know what GMCs need.

That is the way this community is, and it is like this all the time. To this end, please do this so we can be even more help. It looks like you are
working the forum. Only about half here are. That other half gets this as and e-mail and so does not see the Nanoose Bay in the header. So, Go to
Control Panel/Account Settings, pick Preferences and scoll down the sigfile place and put in your name (so that when others see you at a rally, they
know you), the year and model of the coach (there are things that make a difference that you might not know about) and Major Mods (like Sully's) and a
geographic location (so that someone that might like to help will know if he is in striking range.) I am sure I am not alone in having no clue where
Nanoose Bay actually is.

Now, you have to hang on here for a moment, this is a supportive and helping community like very few others. The only way to annoy them is to ignore
the good answers you get here. Then the answers will stop. The only other community that I know of like this is that of watermen. Living in a place
named Nanoose Bay, you may be one or at least know one. Then, you will also understand why I like to welcome new owners much as a new owner or vessel
is welcomed in that community. So,

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

Welcome Jim and Jaci

Matt

> Hello All: I am brand new to forums so have never posted so please be kind. I recently installed a SullyBuilt airbag system and I must say I am
> extremely pleased with the results. Since I'm a new GMC owner of about 6months I had a few newbie questions that one phone call to Todd Sullivan
> the manufacturer cleared up quickly. I am now in the process of replacing the existing Delco compressor with a VIAIR 40040C. I wired it directly
> in place of the old comp so it is using the existing fuse an AGC35 (supposedly rated 40Amps) I fired the compressor up and it filled the tank within
> seconds and all was well until I began putting the suspension through some raise and lower tests. The system worked well for a few minutes then
> everything quit due to a blown fuse. Anyone out there installed the same compressor and had similar problems and any solutions to offer?
>
> Thanks.
>
> Jim

--
Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
'73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
Now with both true Keyless and remote entry
SE Michigan - Twixt A2 and Detroit
 
This circuit breaker resets as it cools down after less than a minute.

On Thu, Sep 8, 2016 at 3:25 PM, Charles Boyd
wrote:

> Oem in the top fuse in the block for the ir compressor is suppose to be a
> circuit breaker similar to this one.
> https://www.napaonline.com/napa/en/p/BK_7823110/BK_7823110
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk
http://www.appliedgmc.com
1-800-752-7502
 
I know where Nanoose Bay is - I was camping there less than a month ago!

But - being on the email list, I had no idea Jim was from Nanoose!

Nice! Greetings from down south!

Rob
Victoria, BC
76 Royale - Rear Twins/Dry Bath

> Jim,
>
> I am sure I am not alone in having no clue where Nanoose Bay actually is.
>
> Matt
>

>> Hello All: I am brand new to forums so have never posted so please be kind. I recently installed a SullyBuilt airbag system and I must say I am
>> extremely pleased with the results. Since I'm a new GMC owner of about 6months I had a few newbie questions that one phone call to Todd Sullivan
>> the manufacturer cleared up quickly. I am now in the process of replacing the existing Delco compressor with a VIAIR 40040C. I wired it directly
>> in place of the old comp so it is using the existing fuse an AGC35 (supposedly rated 40Amps) I fired the compressor up and it filled the tank within
>> seconds and all was well until I began putting the suspension through some raise and lower tests. The system worked well for a few minutes then
>> everything quit due to a blown fuse. Anyone out there installed the same compressor and had similar problems and any solutions to offer?
>>
>> Thanks.
>>
>> Jim
>
>
> --
> Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
> Now with both true Keyless and remote entry
> SE Michigan - Twixt A2 and Detroit
 
> This circuit breaker resets as it cools down after less than a minute.

Jim,

You would be correct if it was a self resetting circuit breaker, but recently, I have run into two 78s that did not have breakers. One was an EL1 and
the other an EL2. I have no clue how common this is.

Matt - Holed up in Erie.

--
Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
'73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
Now with both true Keyless and remote entry
SE Michigan - Twixt A2 and Detroit
 
Probably replaced with fuses when the breakers failed. Which they do, both with age and with repeated opening. Fortunately the normal failure mode
is lower and lower current to actuate tehm, so at least you don't cook something. A breaker which opens after a few minutes of use is suspect - a
short normally takes it out instanter. I stick an ammeter in the line to confirm the load isn't increasing, and if it isn't, trash the breaker. I
personally replace shot ones with a fuse of the proper value, but replacement breakers are available at your friendly parts store.
Note that if the unloader isn't working, many compressors will overcurrent trying to start.

--johnny

--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
 
My air pressure switch never had an unloader. I replaced it years ago with one that did. The unloader one was about $2.00 or $3.00 more than one
without it.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Some are on the switch, some are in the compressor, some cheap setups just have a very small orifice and a check valve in the output line.

--johnny

--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
 
Still learning the posting system. I thought I had posted a reply yesterday. It appears not. So here goes attempt #2.

Thanks to all for their suggestions. I don't have an ammeter with enough capacity to check the draw so that it out at least for awhile. I will
however check the voltage at the compressor and if it looks like it is low I will definitely install a separate line, relay, & fuse. At present the
system seems to be working fine. I ran the suspension through several cycles of raise/lower both together and each independently. The compressor
only ran for perhaps 1-1/2 min during a full raise from a full lowered position.

Matt thanks for the suggestions regarding my profile. I did some changing and hopefully got things done. If not please let me know. Just in case it
doesn't show up correctly. Nanoose Bay is on Vancouver Island in BC.

Rob if you would like to connect please send me an email. Feeling pretty lonely way out here In Nanoose :)

To add a few particulars re the coach. It's a 1977 year 26 foot but I don't know the model. It has the 403 cu. in engine. After reams of reading I
think I managed to ascertain from the serial number that it is a Transmode with interior by Hughes Motor Coach in Ontario Canada. The layout seems to
be GMC floor plan #10 (davo/2 bunk beds on drivers side & dinette/double bed in the rear). It has a nice brass plaque on the left as you enter the
coach that has rocker switches for water & black tank levels, propane level, water pump control, & dual battery levels. There is also an analog clock
and analog coach interior temperature indicator.

--
Jim & Jaci Majer
Nanoose Bay, Vancouver Island BC.
77 year
Model Unknown
Hughes Motor Coach Control Panel for tank levels etc
SullyBuilt suspension retrofit
VIAIR 40040C compressor retrofit
 
Now that we have the year, I will ask if your house batteries are in the rear or the front. On the GM upfitted 1977 coaches, they are in the rear,
but I once worked on a 1977 Transmode that had them up front. What I am interested in by asking that question is there is a big heavy power cable
that runs through the cabinet where the rear mounted compressor is mounted and it is a great power source. Where is your compressor mounted? (Front
or rear)
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
Hi Ken:

The house batteries are mounted in the offside rear with the propane tank(s), in the forward end of that cabinet. The original 60pound? tank has been
replaced with 2 new 20 pounders. The compressor is mounted on the floor on the drivers side mid coach below the converter & 120Vac breaker panel
cabinet. The battery positve lead looks to be maybe #2awg or larger and dives down behind batteries into the wall I suppose. I haven't gotten under
the coach to look to see if it exits the floor. Am I correct in thinking that 'shore power' charges the house batteries through the converter?
Perhaps I can tap into it there if necessary.

We are prepping for a week up island (Vancouver Island) and with the SullyBuilts I bought the block valves & Schraders Todd offers. I can set the
bags at whatever pressure gives correct ride height and block them in so the pressure to get into a rewire is off so to speak, for the immediate
future. I may not have to use the VIair if the draw is too much for the OEM electrical circuit until I have more time to work on it.

I'm have been dealing with other issues as well like a dripping black tank dump pipe flange, Broken black tank level gauge sensor wiring, and
corrosion on the sensor terminal threads, also a leaking hot water drain petcock. So have been a bit willy nilly. I finally had to take a day off to
fish. And what a day it was.

--
Jim & Jaci Majer
Nanoose Bay, Vancouver Island BC.
77 year
Model Unknown
Hughes Motor Coach Control Panel for tank levels etc
SullyBuilt suspension retrofit
VIAIR 40040C compressor retrofit
 
OK that helps. Some people have modified the power supply to the Compressor. They use that Big #2 cable as a source for powering the compressor. In
a GMC built coach in 1977 there is a connection spot for the #2 cable located on the driver's side wall in the back of the cabinet where the
compressor is located. I assume that terminal is also there on a transmode and could be used.

They use a relay, probably about 40 amp, along with the pressure switch to turn the power off and on to the compressor using that #2 connection as the
power source. The relay points get wired in series with the air switch contacts. The relay coil is connected to the lead from up front that goes to
the front fuse panel with the CB in it. That CB is 30 amps I believe. Now the only load on it is the relay coil. So if you do this mod you could
remove that CB and replace it with a small fuse (maybe 2 to 5 amp).

Now that you are totally confused with my post, I'll see if I can find a diagram. I believe there is one on the Western States web site.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
 
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