Thomas compressor

R

richard guthart

New member
Jul 14, 1998
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Scott,

Which configuration of the Thomas 315 are you considering?

I'm the one who started this discussion when I installed the Thomas 317CDC56/12
last January. The 315CDC56/12 has the same stroke (0.56") and max. pressure
rating (150psi) as the model that I installed. It's flow rate is slightly lower
than the 317 (about 7%) but after living with the 317 for 9 months I can say
that I would have no reservations whatsoever about using the 315CDC56/12
instead, and given the price difference I would go with it if I had it to do
over again.

The 315CDC45/12, however, has a shorter stroke (0.45") and max. pressure rating
of 130 psi. Its flow rate, however, is close to the model 317 that I installed.
Does your Thomas rep think the 130 psi version is suited for our application?
Just curious. I was told that compressors are happier when operating comfortably
below their max. pressure rating; that's why I went with the one rated at 150.

Richard

> Today I got a call from the Thomas Compressor Rep. About 2 months ago there
> was quite a bit of discussion. I guess I made an inquiry to Thomas about
> purchasing a quantity of them. (30) IIRC we were discussing using the 315
> for the air bags and thinking about also using its vacuum capability for
> back-up to brake vacuum booster. Has anyone installed the Thomas 315?
> I had him give me a price if I bought them through Adohen Supply Co..
> Quantities were 10-29 $114.14 and for 30-59 $103.00. plus shipping costs
> which would be drop shipped from Wisconsin. Shipping wt was around 4.5lbs.
> Any thoughts?--
>
> Further discussion revealed Thomas will ship one compressor for experimental
> purposes at no cost for 30 days. If it works you pay, if it doesn't you ship
> it back, no questions asked. I am not even close to being able to do
> retrofitting with that system however if there is someone who would like to
> tinker speak-up and I will give you the Reps phone number and you can pursue.
>
> Scott NEHODA'S
> BACK YARD
>
>
 
If I opted for the Thomas, I would need the 317 model since I run my air
bags @ 120 psi, or so the dual needle dash gauge reads.

In order to raise the coach to the maximum height extension, approximately
150 psi would be needed, at least in my case anyway.

Paul Bartz

From: Richard Guthart [mailto:rguthart]
Sent: Tuesday, July 20, 1999 12:11 PM
Subject: Re: GMC: Thomas compressor

Scott,

Which configuration of the Thomas 315 are you considering?

I'm the one who started this discussion when I installed the Thomas
317CDC56/12 last January. The 315CDC56/12 has the same stroke (0.56") and
max. pressure rating (150 psi) as the model that I installed. It's flow rate
is slightly lower than the 317 (about 7%) but after living with the 317 for
9 months I can say that I would have no reservations whatsoever about using
the 315CDC56/12 instead, and given the price difference I would go with it
if I had it to do over again.

The 315CDC45/12, however, has a shorter stroke (0.45") and max. pressure
rating of 130 psi. Its flow rate, however, is close to the model 317 that I
installed. Does your Thomas rep think the 130 psi version is suited for our
application? Just curious. I was told that compressors are happier when
operating comfortably below their max. pressure rating; that's why I went
with the one rated at 150.

Richard

Today I got a call from the Thomas Compressor Rep. About 2 months ago there
was quite a bit of discussion. I guess I made an inquiry to Thomas about
purchasing a quantity of them. (30) IIRC we were discussing using the 315
for the air bags and thinking about also using its vacuum capability for
back-up to brake vacuum booster. Has anyone installed the Thomas 315? I had
him give me a price if I bought them through Adohen Supply Co.. Quantities
were 10-29 $114.14 and for 30-59 $103.00. plus shipping costs which would be
drop shipped from Wisconsin. Shipping wt was around 4.5lbs.
Any thoughts?--

Further discussion revealed Thomas will ship one compressor for experimental
purposes at no cost for 30 days. If it works you pay, if it doesn't you ship
it back, no questions asked. I am not even close to being able to do
retrofitting with that system however if there is someone who would like to
tinker speak-up and I will give you the Reps phone number and you can
pursue.

Scott
 
> Richard did you use the pump to also produce vacuum?
>
No, I'm just using it to supply the electrolevel I air tank as in the O.E.
installation.

Richard
 
This would also be the case if a 4-bagger is installed.
I currently have by cut-off switch set at 135.

Just a couple of pennies thrown in...

BTW, the 317 a better alternative than another Dana? ( I'm getting close to
needing a compressor ).

Heinz
...getting ready for another CA dash. Hopefully a very uneventfull one.

> If I opted for the Thomas, I would need the 317 model since I run my air
> bags @ 120 psi, or so the dual needle dash gauge reads.
>
> In order to raise the coach to the maximum height extension, approximately
> 150 psi would be needed, at least in my case anyway.
>
> Paul Bartz
>
> From: Richard Guthart [mailto:rguthart]
> Sent: Tuesday, July 20, 1999 12:11 PM
> Subject: Re: GMC: Thomas compressor
>
> Scott,
>
> Which configuration of the Thomas 315 are you considering?
>
> I'm the one who started this discussion when I installed the Thomas
> 317CDC56/12 last January. The 315CDC56/12 has the same stroke (0.56") and
> max. pressure rating (150 psi) as the model that I installed. It's flow
rate
> is slightly lower than the 317 (about 7%) but after living with the 317
for
> 9 months I can say that I would have no reservations whatsoever about
using
> the 315CDC56/12 instead, and given the price difference I would go with it
> if I had it to do over again.
>
> The 315CDC45/12, however, has a shorter stroke (0.45") and max. pressure
> rating of 130 psi. Its flow rate, however, is close to the model 317 that
I
> installed. Does your Thomas rep think the 130 psi version is suited for
our
> application? Just curious. I was told that compressors are happier when
> operating comfortably below their max. pressure rating; that's why I went
> with the one rated at 150.
>
> Richard
>
> Today I got a call from the Thomas Compressor Rep. About 2 months ago
there
> was quite a bit of discussion. I guess I made an inquiry to Thomas about
> purchasing a quantity of them. (30) IIRC we were discussing using the 315
> for the air bags and thinking about also using its vacuum capability for
> back-up to brake vacuum booster. Has anyone installed the Thomas 315? I
had
> him give me a price if I bought them through Adohen Supply Co..
Quantities
> were 10-29 $114.14 and for 30-59 $103.00. plus shipping costs which would
be
> drop shipped from Wisconsin. Shipping wt was around 4.5lbs.
> Any thoughts?--
>
> Further discussion revealed Thomas will ship one compressor for
experimental
> purposes at no cost for 30 days. If it works you pay, if it doesn't you
ship
> it back, no questions asked. I am not even close to being able to do
> retrofitting with that system however if there is someone who would like
to
> tinker speak-up and I will give you the Reps phone number and you can
> pursue.
>
> Scott
>
>
 
Heinz:

That's what I have (i. e. 4-bagger).

Paul Bartz

From: Heinz Wittenbecher [mailto:heinz]
Sent: Tuesday, July 20, 1999 1:59 PM
Subject: Re: GMC: Thomas compressor

This would also be the case if a 4-bagger is installed. I currently have by
cut-off switch set at 135.

Just a couple of pennies thrown in...

BTW, the 317 a better alternative than another Dana? ( I'm getting close to
needing a compressor ).

Heinz

...getting ready for another CA dash. Hopefully a very uneventfull one.

If I opted for the Thomas, I would need the 317 model since I run my air
bags @ 120 psi, or so the dual needle dash gauge reads.

In order to raise the coach to the maximum height extension, approximately
150 psi would be needed, at least in my case anyway.

Paul Bartz

From: Richard Guthart [mailto:rguthart]
Sent: Tuesday, July 20, 1999 12:11 PM
Subject: Re: GMC: Thomas compressor

Scott,

Which configuration of the Thomas 315 are you considering?

I'm the one who started this discussion when I installed the Thomas
317CDC56/12 last January. The 315CDC56/12 has the same stroke (0.56") and
max. pressure rating (150 psi) as the model that I installed. It's flow rate
is slightly lower than the 317 (about 7%) but after living with the 317 for
9 months I can say that I would have no reservations whatsoever about

Using the 315CDC56/12 instead, and given the price difference I would go
with it if I had it to do over again.

The 315CDC45/12, however, has a shorter stroke (0.45") and max. pressure
rating of 130 psi. Its flow rate, however, is close to the model 317 that I
installed. Does your Thomas rep think the 130 psi version is suited for our
application? Just curious. I was told that compressors are happier when
operating comfortably below their max. pressure rating; that's why I went
with the one rated at 150.

Richard

Today I got a call from the Thomas Compressor Rep. About 2 months ago there
was quite a bit of discussion. I guess I made an inquiry to Thomas about
purchasing a quantity of them. (30) IIRC we were discussing using the 315
for the air bags and thinking about also using its vacuum capability for
back-up to brake vacuum booster. Has anyone installed the Thomas 315? I had
him give me a price if I bought them through Adohen Supply Co.

Quantities were 10-29 $114.14 and for 30-59 $103.00. plus shipping costs
which would be drop shipped from Wisconsin. Shipping wt was around 4.5lbs.

Any thoughts?--

Further discussion revealed Thomas will ship one compressor for experimental
purposes at no cost for 30 days. If it works you pay, if it doesn't you ship
it back, no questions asked. I am not even close to being able to do
retrofitting with that system however if there is someone who would like to
tinker speak-up and I will give you the Reps phone number and you can
pursue.

Scott
 
In case others are contemplating a 317, count me in for one of the 10 (or
more).

Heinz

> Hello Group, Paul and Richard!
>
> Called rep for Thomas Air Compressors and asked about the 317.
> Max pressure #150 whereas 315 #130 List on the 315 is $165.
> List for 317
> $200.
> 10-29 quantity
> $138.67
> 30-59 quantity
> $125.33
>
> the 317 weighs 6.5 lbs--- 315 4.24lbs
>
> The rep is supposed to be faxing me information as to solenoids/ schematic
to
> switch to vacuum.
>
> Scott INSIDE GMC
> PHOTOS(sound on?)
>
>
>
 
Paul,

Is your GMC stretched or heavier than stock?

With water and waste tanks empty it takes about 80 psi in the right air bag and
90 in the left one to support my coach at normal ride height.

With all tanks full it's about 90-95 psi each side.

Richard

> > If I opted for the Thomas, I would need the 317 model since I run my air
> > bags @ 120 psi, or so the dual needle dash gauge reads> >
> > Paul Bartz
 
Good price. A couple months ago when I was checking, local dealer quoted
$225 and Gateway wanted $195 for the 317.

Scott:

I'll make a phone call to Bobby Moore tonight to see if he has the wiring
schematic he was working on for me to convert to the 317 from my original
Electro Level II system. If everything looks good, pretty sure then I can
use a 317 also.

Does the below price include shipping???

Paul Bartz

From: Heinz Wittenbecher [mailto:heinz]
Sent: Tuesday, July 20, 1999 2:08 PM
Subject: Re: GMC: Thomas compressor

In case others are contemplating a 317, count me in for one of the 10 (or
more).

Hello Group, Paul and Richard!
Called rep for Thomas Air Compressors and asked about the 317. Max pressure
#150 whereas 315 #130 List on the 315 is $165.
List for 317 $200.
10-29 quantity $138.67
30-59 quantity $125.33
the 317 weighs 6.5 lbs--- 315 4.24lbs
The rep is supposed to be faxing me information as to solenoids/schematic to
switch to vacuum.
Scott
 
Richard:

My difference is that I have installed the four air bag suspension system
and 120 psi is what my dual needle dash gauge shows for the level I run.

Paul Bartz

From: Richard Guthart [mailto:rguthart]
Sent: Tuesday, July 20, 1999 2:17 PM
Subject: Re: GMC: Thomas compressor

Paul,

Is your GMC stretched or heavier than stock?

With water and waste tanks empty it takes about 80 psi in the right air bag
and 90 in the left one to support my coach at normal ride height.

With all tanks full it's about 90-95 psi each side.

Richard

> > If I opted for the Thomas, I would need the 317 model since I run my air
bags @ 120 psi, or so the dual needle dash gauge reads> >
> > Paul Bartz
 
Just got a 315CDC45/12 in today. Paid $140.00 for it and it came from the
supplier in Buffalo, NY. I wil be attemptring to hook it up to replace the Dan
tonight or tomorrow. My Dana is pretty tired. I'll do some tests first and time
it from flat to all the way up, and from flat to ride height and let you all
know.

Marcus

> Hello Gmcers!
>
> Today I got a call from the Thomas Compressor Rep. About 2 months ago there
> was quite a bit of discussion. I guess I made an inquiry to Thomas about
> purchasing a quantity of them. (30) IIRC we were discussing using the 315
> for the air bags and thinking about also using its vacuum capability for
> back-up to brake vacuum booster. Has anyone installed the Thomas 315?
> I had him give me a price if I bought them through Adohen Supply Co..
> Quantities were 10-29 $114.14 and for 30-59 $103.00. plus shipping costs
> which would be drop shipped from Wisconsin. Shipping wt was around 4.5lbs.
> Any thoughts?--
>
> Further discussion revealed Thomas will ship one compressor for experimental
> purposes at no cost for 30 days. If it works you pay, if it doesn't you ship
> it back, no questions asked. I am not even close to being able to do
> retrofitting with that system however if there is someone who would like to
> tinker speak-up and I will give you the Reps phone number and you can pursue.
>
> Scott NEHODA'S
> BACK YARD
>
 
I would like one also for my stock system, I run between 120/130PSI. That is
if there is not to much retro to replace stock system, wiring/hookup.
hopefully it would get to the 30 count.

Ron&Gina
73 Pumpkin-Rose
Fort Mohave,AZ.

- ----- Original Message -----
From:
To:
Sent: Tuesday, July 20, 1999 11:26 AM
Subject: Re: GMC: Thomas compressor

> In a message dated 7/20/99 2:08:26 PM Eastern Daylight Time,

>
> > In case others are contemplating a 317, count me in for one of the 10
>
> Hi Heinz!
> You are counted if there is a majority! I'd like to say that these
> compressors can also be used around the garage to fill up low tires and
with
> an air tank used to power those air nailers on occasion. (probably have to
> wait minute for your next trigger pull but it would work :).
>
> Scott http://members.tripod.com/D2CAT t=_self]D2[/url]
 
That's a good price. I had to pay list ($200) for the 317CDC56/12 last December.
At that time the Denver distributor indicated that he would discount to around
$160 for quantities of 10 or more.

> Hello Group, Paul and Richard!
> Called rep for Thomas Air Compressors and asked about the 317. Max pressure
> #150 whereas 315 #130 List on the 315 is $165.
> List for 317 $200.
> 10-29 quantity $138.67
> 30-59 quantity $125.33
> the 317 weighs 6.5 lbs--- 315 4.24lbs
> The rep is supposed to be faxing me information as to solenoids/schematic to
> switch to vacuum.
> Scott
>
 
> Hi Richard!
> Sorry you had to pay that much.....

Oh, I was not complaining, Scott. I suspected that compressor technology had
advanced and was just trying to upgrade from the original 25-year-old design
rather than rebuild my tired old Dana. And now that we know that the Thomas
works as advertised, it's great that you are able to get a volume discount for
additional units.

Richard
 
Scott:

I talked to Bobby this evening. He has a schematic for me for the Thomas
compressor. I furnished him a schematic from the manual that he used to
develop one for my use.

He tells me that I'll need to obtain two additional 12 v electric selonoids.

Remember, I have the Electra Level II system.

So, put me on your list for a Thomas 317 compressor.

Paul Bartz

From: Bartz, Paul
Sent: 7/20/99 2:24 PM
Subject: RE: GMC: Thomas compressor

Good price. A couple months ago when I was checking, local dealer
quoted $225 and Gateway wanted $195 for the 317.

Scott:

I'll make a phone call to Bobby Moore tonight to see if he has the
wiring schematic he was working on for me to convert to the 317 from my
original Electro Level II system. If everything looks good, pretty sure
then I can use a 317 also.

Does the below price include shipping???

Paul Bartz

From: Heinz Wittenbecher [mailto:heinz]
Sent: Tuesday, July 20, 1999 2:08 PM
Subject: Re: GMC: Thomas compressor

In case others are contemplating a 317, count me in for one of the 10
(or more).

Hello Group, Paul and Richard!
Called rep for Thomas Air Compressors and asked about the 317. Max
pressure #150 whereas 315 #130 List on the 315 is $165.
List for 317 $200.
10-29 quantity $138.67
30-59 quantity $125.33
the 317 weighs 6.5 lbs--- 315 4.24lbs
The rep is supposed to be faxing me information as to
solenoids/schematic to switch to vacuum.
Scott
 
Scott:

I don't have it yet. I'll have to contact Bobby for it. Told him last
night I wouldn't get to it for a month or so anyhow. I'll ask him for it
next time I call and then once I get it, try to scan it and e-mail to you.

Also, I said "two additional" solenoid's, totaling four, not two.

Paul

From: Adohen [mailto:Adohen]
Sent: Wednesday, July 21, 1999 1:01 AM
Subject: Re: GMC: Thomas compressor

In a message dated 7/21/99 12:45:31 AM Eastern Daylight Time,

He tells me that I'll need to obtain two additional 12 v electric
solenoid's.

Hi Paul!

The schematic that I'm supposed to get faxed to me also has two solenoids,
if you can please e-mail me a copy of your tenative schematic, I could
compare the two.
 
Scott,

You have room for one more (317)? I would like one too if theres room.

Thanks,

Sam

herm beeck on 07/20/99 03:28:28 PM

Please respond to gmcmotorhome

To: gmcmotorhome
cc: (bcc: Sam Eng/Bellcore)
Subject: Re: GMC: [Re: Thomas compressor]

In case others are contemplating a 317, count me in for one of the 10 (or
more).

Heinz
Scott, count me in for 1 of the 10 #317 units also
(you can send the first one to Heinz since I somehow try to follow what he
does)
Herm

> Hello Group, Paul and Richard!
>
> Called rep for Thomas Air Compressors and asked about the 317.
> Max pressure #150 whereas 315 #130 List on the 315 is $165.
> List for 317
> $200.
> 10-29 quantity
> $138.67
> 30-59 quantity
> $125.33
>
> the 317 weighs 6.5 lbs--- 315 4.24lbs
>
> The rep is supposed to be faxing me information as to solenoids/ schematic
to
> switch to vacuum.
>
> Scott INSIDE GMC
> PHOTOS(sound on?)
>
>
>

____________________________________________________________________
Get your own FREE, personal Netscape WebMail account today at
http://webmail.netscape.com.
 
I have not been following this thread closely. I've been thinking
about headliners and bad smells.

If this is a unit that replaces the air compressor (and is an
improvement over the OEM) and a vacuum pump as well,
I'm interested.

Richard Waters
'76 PB, Troy, MI
- ---------------

>
> >
> > Called rep for Thomas Air Compressors and asked about the 317.
> > Max pressure #150 whereas 315 #130 List on the 315 is $165.
> > List for 317
> > $200.
> > 10-29 quantity
> > $138.67
> > 30-59 quantity
> > $125.33
> >
> > the 317 weighs 6.5 lbs--- 315 4.24lbs
> >
> > The rep is supposed to be faxing me information as to solenoids/ schematic
> to
> > switch to vacuum.
> >
> > Scott INSIDE GMC
> > PHOTOS(sound on?)
> >
> >
> >
>
> ____________________________________________________________________
> Get your own FREE, personal Netscape WebMail account today at
> http://webmail.netscape.com.
 
>-----Original Message-----
>From: Adohen [mailto:Adohen]

>Hello Gmcers!

Hello Scott!

Hope you are doing fine, I was disturbed to hear today you are still trying
to get that frame and body back together. I had hoped that was done and you
had been able to move on. I hope you get past this real soon. As for me, I
have succumb to spare parts disease. I soon will be able to build a 2nd GM
shortly at my current rate.

I would like to take part in your offer of being included in your mass
purchase of the Thomas Compressor. If I read the posts correctly, people
are using them as a replacement for the dana. Thanks again for all your
past assistance and for the compressor too. walter bright, 76 GB.
 
Walter:

In the case of the Electra Level II suspension, installed during the latter
half of production in 1978 models, the compressor, of which there are two,
is not a Dana. It's the same, very small (you can hold it in your hand)
tankless compressor installed inside the coach that GM used on their large
body cars having a rear suspension level control, for years.

Paul Bartz

From: Bright, Walter [mailto:paa8394]
Sent: Wednesday, July 21, 1999 1:23 PM
Subject: RE: GMC: Thomas compressor

I would like to take part in your offer of being included in your mass
purchase of the Thomas Compressor. If I read the posts correctly, people
are using them as a replacement for the dana.
 
- -----Original Message-----
From: Bartz, Paul [mailto:s9d3452]


In the case of the Electra Level II suspension, installed during the latter
half of production in 1978 models, the compressor, of which there are two,
is not a Dana.

Paul;

Agreed, I was thinking of myself. I should have said something such as I
wanted to verify the compressor could be used to replace the rebuilt Dana
used in my 1976 Glenbrook. walter bright.

 
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