GMC Motorhome Digest V2 #561

[bartz paul]

Duanne:

What's the basis for saying:

a. will wear out with many turn on cycles

b. Thomas is a wimp in terms of what our GMC needs

Do you have data to support those conclusions?????

Paul Bartz

From: duane m simmons
Sent: 7/23/99 11:49 PM
Subject: Re: GMC: GMC Motorhome Digest V2 #561

Ron & Gina
Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
for repair Dana units (very cost effective). Thomas compressors are a
throw away item since repair parts are not available. Send you
time/$$$$
& use it in fixing the air leaks in you existing system & then the Dana
will serve you well. A new Thomas unit will not fix leaks in the system
& will wear out with many turn on cycles required do to the leaks. To
me
the Thomas is a wimp in terms of what our GMC needs. The Dana works
fine
for our needs.
I repaired my air system (Power Level-now no leaks) 11 years ago
including rebuild of the Dana & rewiring power to Dana......have not
touched it since. Now w/100k miles on it w/o any problems except
replacement of both Air Bags about 2 year ago. This is the results to
be
expected with proper air leak repair. My compressor comes on ONCE a day
to pump up the air tank & then never (well almost never) comes on again
all day while using the Travel/Automatic mode.
Purchasing a new Thomas is not going to fix the problems that most GMC
have with the air system....air leaks. Must fix basic problem & then a
rebuild Dana or new Thomas may do some good.
OBTW I plan on a technical presentation addressing the GMC Air
Suspension
System at the Western States Roundup in Albuquerque, Oct 5 '99.
Hope to see you there.

Duane Simmons

___________________________________________________________________
Get the Internet just the way you want it.
Free software, free e-mail, and free Internet access for a month!
Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

 

[gary miller]

Ron,
Be sure to check (or replace) the check valve. If this is deffective (rather
common) then pressure will leak back through pump when pump is at rest. New
check valve from Jim Bounds is aprox $20.
Gary
North Bend, Oregon Coast

> Hi Duane, I have checked my air system Atleast all fittings,"T"s, tank, Air
> bags, and controllers(had it out,and broke fitting to air gauge which I
> repaired) with out finding any leaks also checked tubing hold-downs/ties,
> tubing thru firewall. Was starting to see if I have leak-by on pump? Is this
> possible with bad rings? checked pump crossover which looked OK same with
> heads, going to check intake area next. My air bags has held 120# press. for
> last 31/2 days, while in that same time Tk. went from 130 to 10 Reason for
> looking into Thomas compressor.During our last trip I don't believe the
> comp. came on more than 2 times(600mi.) except thru me for gas stations.
> >From 0 to 130 Tank only it takes about 3-4mins! And if raising the lady
> seems like ten+ min..Is this normal? Thanks for any info.
>
> Ron&Gina
> 73 Pumpkin-Rose
> Fort Mohave,AZ.
>
> ----- Original Message -----
> From: duane m simmons
> To:
> Sent: Friday, July 23, 1999 8:49 PM
> Subject: Re: GMC: GMC Motorhome Digest V2 #561
>
> > Ron & Gina
> > Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
> > for repair Dana units (very cost effective). Thomas compressors are a
> > throw away item since repair parts are not available. Send you time/$$$$
> > & use it in fixing the air leaks in you existing system & then the Dana
> > will serve you well. A new Thomas unit will not fix leaks in the system
> > & will wear out with many turn on cycles required do to the leaks. To me
> > the Thomas is a wimp in terms of what our GMC needs. The Dana works fine
> > for our needs.
> > I repaired my air system (Power Level-now no leaks) 11 years ago
> > including rebuild of the Dana & rewiring power to Dana......have not
> > touched it since. Now w/100k miles on it w/o any problems except
> > replacement of both Air Bags about 2 year ago. This is the results to be
> > expected with proper air leak repair. My compressor comes on ONCE a day
> > to pump up the air tank & then never (well almost never) comes on again
> > all day while using the Travel/Automatic mode.
> > Purchasing a new Thomas is not going to fix the problems that most GMC
> > have with the air system....air leaks. Must fix basic problem & then a
> > rebuild Dana or new Thomas may do some good.
> > OBTW I plan on a technical presentation addressing the GMC Air Suspension
> > System at the Western States Roundup in Albuquerque, Oct 5 '99.
> > Hope to see you there.
> >
> > Duane Simmons
> >
> > ___________________________________________________________________
> > Get the Internet just the way you want it.
> > Free software, free e-mail, and free Internet access for a month!
> > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

 

[ron & gina]

Hi Duane, I have checked my air system Atleast all fittings,"T"s, tank, Air
bags, and controllers(had it out,and broke fitting to air gauge which I
repaired) with out finding any leaks also checked tubing hold-downs/ties,
tubing thru firewall. Was starting to see if I have leak-by on pump? Is this
possible with bad rings? checked pump crossover which looked OK same with
heads, going to check intake area next. My air bags has held 120# press. for
last 31/2 days, while in that same time Tk. went from 130 to 10 Reason for
looking into Thomas compressor.During our last trip I don't believe the
comp. came on more than 2 times(600mi.) except thru me for gas stations.
>From 0 to 130 Tank only it takes about 3-4mins! And if raising the lady
seems like ten+ min..Is this normal? Thanks for any info.

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

- ----- Original Message -----
From: duane m simmons
To:
Sent: Friday, July 23, 1999 8:49 PM
Subject: Re: GMC: GMC Motorhome Digest V2 #561

> Ron & Gina
> Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
> for repair Dana units (very cost effective). Thomas compressors are a
> throw away item since repair parts are not available. Send you time/$$$$
> & use it in fixing the air leaks in you existing system & then the Dana
> will serve you well. A new Thomas unit will not fix leaks in the system
> & will wear out with many turn on cycles required do to the leaks. To me
> the Thomas is a wimp in terms of what our GMC needs. The Dana works fine
> for our needs.
> I repaired my air system (Power Level-now no leaks) 11 years ago
> including rebuild of the Dana & rewiring power to Dana......have not
> touched it since. Now w/100k miles on it w/o any problems except
> replacement of both Air Bags about 2 year ago. This is the results to be
> expected with proper air leak repair. My compressor comes on ONCE a day
> to pump up the air tank & then never (well almost never) comes on again
> all day while using the Travel/Automatic mode.
> Purchasing a new Thomas is not going to fix the problems that most GMC
> have with the air system....air leaks. Must fix basic problem & then a
> rebuild Dana or new Thomas may do some good.
> OBTW I plan on a technical presentation addressing the GMC Air Suspension
> System at the Western States Roundup in Albuquerque, Oct 5 '99.
> Hope to see you there.
>
> Duane Simmons
>
> ___________________________________________________________________
> Get the Internet just the way you want it.
> Free software, free e-mail, and free Internet access for a month!
> Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

 

[ron & gina]

Hi Gary, Is it the valve fitting at tank? or on pump? guess if its on tk.
its leaking by since my gauge goes down(next to auto/man control valves)
also when putting in raise position air bag increases gauge which shows I
lost press. in Tk.

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

- ----- Original Message -----
From: Gary Miller
To:
Sent: Friday, July 23, 1999 9:19 PM
Subject: Re: GMC: GMC Motorhome Digest V2 #561

> Ron,
> Be sure to check (or replace) the check valve. If this is deffective
(rather
> common) then pressure will leak back through pump when pump is at rest.
New
> check valve from Jim Bounds is aprox $20.
> Gary
> North Bend, Oregon Coast
>

>
> > Hi Duane, I have checked my air system Atleast all fittings,"T"s, tank,
Air
> > bags, and controllers(had it out,and broke fitting to air gauge which I
> > repaired) with out finding any leaks also checked tubing
hold-downs/ties,
> > tubing thru firewall. Was starting to see if I have leak-by on pump? Is
this
> > possible with bad rings? checked pump crossover which looked OK same
with
> > heads, going to check intake area next. My air bags has held 120# press.
for
> > last 31/2 days, while in that same time Tk. went from 130 to 10 Reason
for
> > looking into Thomas compressor.During our last trip I don't believe the
> > comp. came on more than 2 times(600mi.) except thru me for gas stations.
> > >From 0 to 130 Tank only it takes about 3-4mins! And if raising the
lady
> > seems like ten+ min..Is this normal? Thanks for any info.
> >
> > Ron&Gina
> > 73 Pumpkin-Rose
> > Fort Mohave,AZ.
> >
> > ----- Original Message -----
> > From: duane m simmons
> > To:
> > Sent: Friday, July 23, 1999 8:49 PM
> > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> >
> > > Ron & Gina
> > > Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
> > > for repair Dana units (very cost effective). Thomas compressors are a
> > > throw away item since repair parts are not available. Send you
time/$$$$
> > > & use it in fixing the air leaks in you existing system & then the
Dana
> > > will serve you well. A new Thomas unit will not fix leaks in the
system
> > > & will wear out with many turn on cycles required do to the leaks. To
me
> > > the Thomas is a wimp in terms of what our GMC needs. The Dana works
fine
> > > for our needs.
> > > I repaired my air system (Power Level-now no leaks) 11 years ago
> > > including rebuild of the Dana & rewiring power to Dana......have not
> > > touched it since. Now w/100k miles on it w/o any problems except
> > > replacement of both Air Bags about 2 year ago. This is the results to
be
> > > expected with proper air leak repair. My compressor comes on ONCE a
day
> > > to pump up the air tank & then never (well almost never) comes on
again
> > > all day while using the Travel/Automatic mode.
> > > Purchasing a new Thomas is not going to fix the problems that most GMC
> > > have with the air system....air leaks. Must fix basic problem & then
a
> > > rebuild Dana or new Thomas may do some good.
> > > OBTW I plan on a technical presentation addressing the GMC Air
Suspension
> > > System at the Western States Roundup in Albuquerque, Oct 5 '99.
> > > Hope to see you there.
> > >
> > > Duane Simmons
> > >
> > > ___________________________________________________________________
> > > Get the Internet just the way you want it.
> > > Free software, free e-mail, and free Internet access for a month!
> > > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
>
>
>

 

[john wright]

I agree with Duane. I also run the 2797 and it works just fine. I can
hear it engage and disengage and I what to move air if it is hot.

J.R. Wright

>
> Phil Swanson
> If your 2797 fan clutch (or any other fan clutch) is on 98% of the time,
> it is locked up & faulty. They don't work that way.....only when faulty,
> like all fan clutches, do they work that way. Never keep any of Hayden's
> fan clutches that are locked up & are on 98% of the time. Replace it
> under warranty.
> Your assessment of the 2797 is faulty & not representative of a "Good"
> 2797 fan clutch. It is off, except when excessive heat is required to be
> removed. No penalty in mpg with a proper operating 2797 fan clutch.
> Trust me....i have been there many times with many coaches that have
> faulty fan clutches.
> Again, your assessment is not valid with a sample of one (Faulty at
> that) & should be disregarded when others select a fan clutch.
>
> MHO
> Duane
>
> ___________________________________________________________________
> Get the Internet just the way you want it.
> Free software, free e-mail, and free Internet access for a month!
> Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

 

[john wright]

It doesn't matter which type of compressor that you use. The real point
is that you have an air system that is functioning correctly. If you
have air leak down problems you will wear out the 317 just as fast as
the Dana. I personally have a Darcy Moses York air compressor. I also
have totally rebuilt my air system. I wanted the extra volume that the
York provides to fill tires quickly and other air needs.

J.R. Wright
GMC GreatLaker
77 Eleganza
Michigan

>
> Duanne:
>
> What's the basis for saying:
>
> a. will wear out with many turn on cycles
>
> b. Thomas is a wimp in terms of what our GMC needs
>
> Do you have data to support those conclusions?????
>
> Paul Bartz
>
> From: duane m simmons
> Sent: 7/23/99 11:49 PM
> Subject: Re: GMC: GMC Motorhome Digest V2 #561
>
> Ron & Gina
> Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
> for repair Dana units (very cost effective). Thomas compressors are a
> throw away item since repair parts are not available. Send you
> time/$$$$
> & use it in fixing the air leaks in you existing system & then the Dana
> will serve you well. A new Thomas unit will not fix leaks in the system
> & will wear out with many turn on cycles required do to the leaks. To
> me
> the Thomas is a wimp in terms of what our GMC needs. The Dana works
> fine
> for our needs.
> I repaired my air system (Power Level-now no leaks) 11 years ago
> including rebuild of the Dana & rewiring power to Dana......have not
> touched it since. Now w/100k miles on it w/o any problems except
> replacement of both Air Bags about 2 year ago. This is the results to
> be
> expected with proper air leak repair. My compressor comes on ONCE a day
> to pump up the air tank & then never (well almost never) comes on again
> all day while using the Travel/Automatic mode.
> Purchasing a new Thomas is not going to fix the problems that most GMC
> have with the air system....air leaks. Must fix basic problem & then a
> rebuild Dana or new Thomas may do some good.
> OBTW I plan on a technical presentation addressing the GMC Air
> Suspension
> System at the Western States Roundup in Albuquerque, Oct 5 '99.
> Hope to see you there.
>
> Duane Simmons
>
> ___________________________________________________________________
> Get the Internet just the way you want it.
> Free software, free e-mail, and free Internet access for a month!
> Try Juno Web: http://dl.www.juno.com/dynoget/tagj.

 

[gary miller]

Ron,
The check valve is (usually) the first thing in the line from the output of the
compressor. All the valves I have seen look like a long coupling, usually made
of brass but the best ones are SS. They are about 4" long and about 1" square.
They tend to corrode with age and will leak allowing your compressed air seep
back through the compressor. When replacing be sure to install it so that the
air flow is in the correct direction. Jim Bounds sells them and you should
also be able to find one in WalMart near the air compressors.
Gary
North Bend, Oregon Coast
Highway crowded with SOBs

> Hi Gary, Is it the valve fitting at tank? or on pump? guess if its on tk.
> its leaking by since my gauge goes down(next to auto/man control valves)
> also when putting in raise position air bag increases gauge which shows I
> lost press. in Tk.
>
> Ron&Gina
> 73 Pumpkin-Rose
> Ft. Mohave,AZ.
>
> ----- Original Message -----
> From: Gary Miller
> To:
> Sent: Friday, July 23, 1999 9:19 PM
> Subject: Re: GMC: GMC Motorhome Digest V2 #561
>
> > Ron,
> > Be sure to check (or replace) the check valve. If this is deffective
> (rather
> > common) then pressure will leak back through pump when pump is at rest.
> New
> > check valve from Jim Bounds is aprox $20.
> > Gary
> > North Bend, Oregon Coast
> >

> >
> > > Hi Duane, I have checked my air system Atleast all fittings,"T"s, tank,
> Air
> > > bags, and controllers(had it out,and broke fitting to air gauge which I
> > > repaired) with out finding any leaks also checked tubing
> hold-downs/ties,
> > > tubing thru firewall. Was starting to see if I have leak-by on pump? Is
> this
> > > possible with bad rings? checked pump crossover which looked OK same
> with
> > > heads, going to check intake area next. My air bags has held 120# press.
> for
> > > last 31/2 days, while in that same time Tk. went from 130 to 10 Reason
> for
> > > looking into Thomas compressor.During our last trip I don't believe the
> > > comp. came on more than 2 times(600mi.) except thru me for gas stations.
> > > >From 0 to 130 Tank only it takes about 3-4mins! And if raising the
> lady
> > > seems like ten+ min..Is this normal? Thanks for any info.
> > >
> > > Ron&Gina
> > > 73 Pumpkin-Rose
> > > Fort Mohave,AZ.
> > >
> > > ----- Original Message -----
> > > From: duane m simmons
> > > To:
> > > Sent: Friday, July 23, 1999 8:49 PM
> > > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> > >
> > > > Ron & Gina
> > > > Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
> > > > for repair Dana units (very cost effective). Thomas compressors are a
> > > > throw away item since repair parts are not available. Send you
> time/$$$$
> > > > & use it in fixing the air leaks in you existing system & then the
> Dana
> > > > will serve you well. A new Thomas unit will not fix leaks in the
> system
> > > > & will wear out with many turn on cycles required do to the leaks. To
> me
> > > > the Thomas is a wimp in terms of what our GMC needs. The Dana works
> fine
> > > > for our needs.
> > > > I repaired my air system (Power Level-now no leaks) 11 years ago
> > > > including rebuild of the Dana & rewiring power to Dana......have not
> > > > touched it since. Now w/100k miles on it w/o any problems except
> > > > replacement of both Air Bags about 2 year ago. This is the results to
> be
> > > > expected with proper air leak repair. My compressor comes on ONCE a
> day
> > > > to pump up the air tank & then never (well almost never) comes on
> again
> > > > all day while using the Travel/Automatic mode.
> > > > Purchasing a new Thomas is not going to fix the problems that most GMC
> > > > have with the air system....air leaks. Must fix basic problem & then
> a
> > > > rebuild Dana or new Thomas may do some good.
> > > > OBTW I plan on a technical presentation addressing the GMC Air
> Suspension
> > > > System at the Western States Roundup in Albuquerque, Oct 5 '99.
> > > > Hope to see you there.
> > > >
> > > > Duane Simmons
> > > >
> > > > ___________________________________________________________________
> > > > Get the Internet just the way you want it.
> > > > Free software, free e-mail, and free Internet access for a month!
> > > > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
> >
> >
> >

 

[gary miller]

Ron--
Maybe you don't even have one. You should add one if not.
Gary
North Bend, Oregon Coast
Nice 76 degrees. Clear skys all the way to the Pacific Ocean horizon.

> Thanks again for info! Nothing at pump, must be it at inlet to Tk. will
> check/replace later to HOT today!!!
>
> Ron
>
> ----- Original Message -----
> From: Gary Miller
> To:
> Sent: Saturday, July 24, 1999 1:05 PM
> Subject: Re: GMC: GMC Motorhome Digest V2 #561
>
> > Ron,
> > The check valve is (usually) the first thing in the line from the output
> of the
> > compressor. All the valves I have seen look like a long coupling, usually
> made
> > of brass but the best ones are SS. They are about 4" long and about 1"
> square.
> > They tend to corrode with age and will leak allowing your compressed air
> seep
> > back through the compressor. When replacing be sure to install it so
> that the
> > air flow is in the correct direction. Jim Bounds sells them and you
> should
> > also be able to find one in WalMart near the air compressors.
> > Gary
> > North Bend, Oregon Coast
> > Highway crowded with SOBs
> >

> >
> > > Hi Gary, Is it the valve fitting at tank? or on pump? guess if its on
> tk.
> > > its leaking by since my gauge goes down(next to auto/man control valves)
> > > also when putting in raise position air bag increases gauge which shows
> I
> > > lost press. in Tk.
> > >
> > > Ron&Gina
> > > 73 Pumpkin-Rose
> > > Ft. Mohave,AZ.
> > >
> > > ----- Original Message -----
> > > From: Gary Miller
> > > To:
> > > Sent: Friday, July 23, 1999 9:19 PM
> > > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> > >
> > > > Ron,
> > > > Be sure to check (or replace) the check valve. If this is deffective
> > > (rather
> > > > common) then pressure will leak back through pump when pump is at
> rest.
> > > New
> > > > check valve from Jim Bounds is aprox $20.
> > > > Gary
> > > > North Bend, Oregon Coast
> > > >

> > > >
> > > > > Hi Duane, I have checked my air system Atleast all fittings,"T"s,
> tank,
> > > Air
> > > > > bags, and controllers(had it out,and broke fitting to air gauge
> which I
> > > > > repaired) with out finding any leaks also checked tubing
> > > hold-downs/ties,
> > > > > tubing thru firewall. Was starting to see if I have leak-by on pump?
> Is
> > > this
> > > > > possible with bad rings? checked pump crossover which looked OK same
> > > with
> > > > > heads, going to check intake area next. My air bags has held 120#
> press.
> > > for
> > > > > last 31/2 days, while in that same time Tk. went from 130 to 10
> Reason
> > > for
> > > > > looking into Thomas compressor.During our last trip I don't believe
> the
> > > > > comp. came on more than 2 times(600mi.) except thru me for gas
> stations.
> > > > > >From 0 to 130 Tank only it takes about 3-4mins! And if raising
> the
> > > lady
> > > > > seems like ten+ min..Is this normal? Thanks for any info.
> > > > >
> > > > > Ron&Gina
> > > > > 73 Pumpkin-Rose
> > > > > Fort Mohave,AZ.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: duane m simmons
> > > > > To:
> > > > > Sent: Friday, July 23, 1999 8:49 PM
> > > > > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> > > > >
> > > > > > Ron & Gina
> > > > > > Save your $$$$$$$ & keep the Dana Air Compressor. Parts are
> available
> > > > > > for repair Dana units (very cost effective). Thomas compressors
> are a
> > > > > > throw away item since repair parts are not available. Send you
> > > time/$$$$
> > > > > > & use it in fixing the air leaks in you existing system & then the
> > > Dana
> > > > > > will serve you well. A new Thomas unit will not fix leaks in the
> > > system
> > > > > > & will wear out with many turn on cycles required do to the leaks.
> To
> > > me
> > > > > > the Thomas is a wimp in terms of what our GMC needs. The Dana
> works
> > > fine
> > > > > > for our needs.
> > > > > > I repaired my air system (Power Level-now no leaks) 11 years ago
> > > > > > including rebuild of the Dana & rewiring power to Dana......have
> not
> > > > > > touched it since. Now w/100k miles on it w/o any problems except
> > > > > > replacement of both Air Bags about 2 year ago. This is the
> results to
> > > be
> > > > > > expected with proper air leak repair. My compressor comes on ONCE
> a
> > > day
> > > > > > to pump up the air tank & then never (well almost never) comes on
> > > again
> > > > > > all day while using the Travel/Automatic mode.
> > > > > > Purchasing a new Thomas is not going to fix the problems that most
> GMC
> > > > > > have with the air system....air leaks. Must fix basic problem &
> then
> > > a
> > > > > > rebuild Dana or new Thomas may do some good.
> > > > > > OBTW I plan on a technical presentation addressing the GMC Air
> > > Suspension
> > > > > > System at the Western States Roundup in Albuquerque, Oct 5 '99.
> > > > > > Hope to see you there.
> > > > > >
> > > > > > Duane Simmons
> > > > > >
> > > > > >
> ___________________________________________________________________
> > > > > > Get the Internet just the way you want it.
> > > > > > Free software, free e-mail, and free Internet access for a month!
> > > > > > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
> > > >
> > > >
> > > >
> >
> >
> >

 

[ron & gina]

Thanks again for info! Nothing at pump, must be it at inlet to Tk. will
check/replace later to HOT today!!!

Ron

- ----- Original Message -----
From: Gary Miller
To:
Sent: Saturday, July 24, 1999 1:05 PM
Subject: Re: GMC: GMC Motorhome Digest V2 #561

> Ron,
> The check valve is (usually) the first thing in the line from the output
of the
> compressor. All the valves I have seen look like a long coupling, usually
made
> of brass but the best ones are SS. They are about 4" long and about 1"
square.
> They tend to corrode with age and will leak allowing your compressed air
seep
> back through the compressor. When replacing be sure to install it so
that the
> air flow is in the correct direction. Jim Bounds sells them and you
should
> also be able to find one in WalMart near the air compressors.
> Gary
> North Bend, Oregon Coast
> Highway crowded with SOBs
>

>
> > Hi Gary, Is it the valve fitting at tank? or on pump? guess if its on
tk.
> > its leaking by since my gauge goes down(next to auto/man control valves)
> > also when putting in raise position air bag increases gauge which shows
I
> > lost press. in Tk.
> >
> > Ron&Gina
> > 73 Pumpkin-Rose
> > Ft. Mohave,AZ.
> >
> > ----- Original Message -----
> > From: Gary Miller
> > To:
> > Sent: Friday, July 23, 1999 9:19 PM
> > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> >
> > > Ron,
> > > Be sure to check (or replace) the check valve. If this is deffective
> > (rather
> > > common) then pressure will leak back through pump when pump is at
rest.
> > New
> > > check valve from Jim Bounds is aprox $20.
> > > Gary
> > > North Bend, Oregon Coast
> > >

> > >
> > > > Hi Duane, I have checked my air system Atleast all fittings,"T"s,
tank,
> > Air
> > > > bags, and controllers(had it out,and broke fitting to air gauge
which I
> > > > repaired) with out finding any leaks also checked tubing
> > hold-downs/ties,
> > > > tubing thru firewall. Was starting to see if I have leak-by on pump?
Is
> > this
> > > > possible with bad rings? checked pump crossover which looked OK same
> > with
> > > > heads, going to check intake area next. My air bags has held 120#
press.
> > for
> > > > last 31/2 days, while in that same time Tk. went from 130 to 10
Reason
> > for
> > > > looking into Thomas compressor.During our last trip I don't believe
the
> > > > comp. came on more than 2 times(600mi.) except thru me for gas
stations.
> > > > >From 0 to 130 Tank only it takes about 3-4mins! And if raising
the
> > lady
> > > > seems like ten+ min..Is this normal? Thanks for any info.
> > > >
> > > > Ron&Gina
> > > > 73 Pumpkin-Rose
> > > > Fort Mohave,AZ.
> > > >
> > > > ----- Original Message -----
> > > > From: duane m simmons
> > > > To:
> > > > Sent: Friday, July 23, 1999 8:49 PM
> > > > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> > > >
> > > > > Ron & Gina
> > > > > Save your $$$$$$$ & keep the Dana Air Compressor. Parts are
available
> > > > > for repair Dana units (very cost effective). Thomas compressors
are a
> > > > > throw away item since repair parts are not available. Send you
> > time/$$$$
> > > > > & use it in fixing the air leaks in you existing system & then the
> > Dana
> > > > > will serve you well. A new Thomas unit will not fix leaks in the
> > system
> > > > > & will wear out with many turn on cycles required do to the leaks.
To
> > me
> > > > > the Thomas is a wimp in terms of what our GMC needs. The Dana
works
> > fine
> > > > > for our needs.
> > > > > I repaired my air system (Power Level-now no leaks) 11 years ago
> > > > > including rebuild of the Dana & rewiring power to Dana......have
not
> > > > > touched it since. Now w/100k miles on it w/o any problems except
> > > > > replacement of both Air Bags about 2 year ago. This is the
results to
> > be
> > > > > expected with proper air leak repair. My compressor comes on ONCE
a
> > day
> > > > > to pump up the air tank & then never (well almost never) comes on
> > again
> > > > > all day while using the Travel/Automatic mode.
> > > > > Purchasing a new Thomas is not going to fix the problems that most
GMC
> > > > > have with the air system....air leaks. Must fix basic problem &
then
> > a
> > > > > rebuild Dana or new Thomas may do some good.
> > > > > OBTW I plan on a technical presentation addressing the GMC Air
> > Suspension
> > > > > System at the Western States Roundup in Albuquerque, Oct 5 '99.
> > > > > Hope to see you there.
> > > > >
> > > > > Duane Simmons
> > > > >
> > > > >
___________________________________________________________________
> > > > > Get the Internet just the way you want it.
> > > > > Free software, free e-mail, and free Internet access for a month!
> > > > > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
> > >
> > >
> > >
>
>
>

 

[ron & gina]

Gary, found what looks like a older one @ tk. inlet, Will check later,
Working on some cool ones now, Then crossing river to make some money for
the lady. Well most likely donate again!! Thanks

Ron&Gina
73 Pumpkin-Rose
Fort Mohave,AZ.... A cool wave again its only 108 in the shade!!!!

- ----- Original Message -----
From: Gary Miller
To:
Sent: Saturday, July 24, 1999 2:57 PM
Subject: Re: GMC: GMC Motorhome Digest V2 #561

> Ron--
> Maybe you don't even have one. You should add one if not.
> Gary
> North Bend, Oregon Coast
> Nice 76 degrees. Clear skys all the way to the Pacific Ocean horizon.
>

>
> > Thanks again for info! Nothing at pump, must be it at inlet to Tk. will
> > check/replace later to HOT today!!!
> >
> > Ron
> >
> > ----- Original Message -----
> > From: Gary Miller
> > To:
> > Sent: Saturday, July 24, 1999 1:05 PM
> > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> >
> > > Ron,
> > > The check valve is (usually) the first thing in the line from the
output
> > of the
> > > compressor. All the valves I have seen look like a long coupling,
usually
> > made
> > > of brass but the best ones are SS. They are about 4" long and about
1"
> > square.
> > > They tend to corrode with age and will leak allowing your compressed
air
> > seep
> > > back through the compressor. When replacing be sure to install it so
> > that the
> > > air flow is in the correct direction. Jim Bounds sells them and you
> > should
> > > also be able to find one in WalMart near the air compressors.
> > > Gary
> > > North Bend, Oregon Coast
> > > Highway crowded with SOBs
> > >

> > >
> > > > Hi Gary, Is it the valve fitting at tank? or on pump? guess if its
on
> > tk.
> > > > its leaking by since my gauge goes down(next to auto/man control
valves)
> > > > also when putting in raise position air bag increases gauge which
shows
> > I
> > > > lost press. in Tk.
> > > >
> > > > Ron&Gina
> > > > 73 Pumpkin-Rose
> > > > Ft. Mohave,AZ.
> > > >
> > > > ----- Original Message -----
> > > > From: Gary Miller
> > > > To:
> > > > Sent: Friday, July 23, 1999 9:19 PM
> > > > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> > > >
> > > > > Ron,
> > > > > Be sure to check (or replace) the check valve. If this is
deffective
> > > > (rather
> > > > > common) then pressure will leak back through pump when pump is at
> > rest.
> > > > New
> > > > > check valve from Jim Bounds is aprox $20.
> > > > > Gary
> > > > > North Bend, Oregon Coast
> > > > >

> > > > >
> > > > > > Hi Duane, I have checked my air system Atleast all
fittings,"T"s,
> > tank,
> > > > Air
> > > > > > bags, and controllers(had it out,and broke fitting to air gauge
> > which I
> > > > > > repaired) with out finding any leaks also checked tubing
> > > > hold-downs/ties,
> > > > > > tubing thru firewall. Was starting to see if I have leak-by on
pump?
> > Is
> > > > this
> > > > > > possible with bad rings? checked pump crossover which looked OK
same
> > > > with
> > > > > > heads, going to check intake area next. My air bags has held
120#
> > press.
> > > > for
> > > > > > last 31/2 days, while in that same time Tk. went from 130 to
10
> > Reason
> > > > for
> > > > > > looking into Thomas compressor.During our last trip I don't
believe
> > the
> > > > > > comp. came on more than 2 times(600mi.) except thru me for gas
> > stations.
> > > > > > >From 0 to 130 Tank only it takes about 3-4mins! And if
raising
> > the
> > > > lady
> > > > > > seems like ten+ min..Is this normal? Thanks for any info.
> > > > > >
> > > > > > Ron&Gina
> > > > > > 73 Pumpkin-Rose
> > > > > > Fort Mohave,AZ.
> > > > > >
> > > > > > ----- Original Message -----
> > > > > > From: duane m simmons
> > > > > > To:
> > > > > > Sent: Friday, July 23, 1999 8:49 PM
> > > > > > Subject: Re: GMC: GMC Motorhome Digest V2 #561
> > > > > >
> > > > > > > Ron & Gina
> > > > > > > Save your $$$$$$$ & keep the Dana Air Compressor. Parts are
> > available
> > > > > > > for repair Dana units (very cost effective). Thomas
compressors
> > are a
> > > > > > > throw away item since repair parts are not available. Send
you
> > > > time/$$$$
> > > > > > > & use it in fixing the air leaks in you existing system & then
the
> > > > Dana
> > > > > > > will serve you well. A new Thomas unit will not fix leaks in
the
> > > > system
> > > > > > > & will wear out with many turn on cycles required do to the
leaks.
> > To
> > > > me
> > > > > > > the Thomas is a wimp in terms of what our GMC needs. The Dana
> > works
> > > > fine
> > > > > > > for our needs.
> > > > > > > I repaired my air system (Power Level-now no leaks) 11 years
ago
> > > > > > > including rebuild of the Dana & rewiring power to
Dana......have
> > not
> > > > > > > touched it since. Now w/100k miles on it w/o any problems
except
> > > > > > > replacement of both Air Bags about 2 year ago. This is the
> > results to
> > > > be
> > > > > > > expected with proper air leak repair. My compressor comes on
ONCE
> > a
> > > > day
> > > > > > > to pump up the air tank & then never (well almost never) comes
on
> > > > again
> > > > > > > all day while using the Travel/Automatic mode.
> > > > > > > Purchasing a new Thomas is not going to fix the problems that
most
> > GMC
> > > > > > > have with the air system....air leaks. Must fix basic
problem &
> > then
> > > > a
> > > > > > > rebuild Dana or new Thomas may do some good.
> > > > > > > OBTW I plan on a technical presentation addressing the GMC Air
> > > > Suspension
> > > > > > > System at the Western States Roundup in Albuquerque, Oct 5
'99.
> > > > > > > Hope to see you there.
> > > > > > >
> > > > > > > Duane Simmons
> > > > > > >
> > > > > > >
> > ___________________________________________________________________
> > > > > > > Get the Internet just the way you want it.
> > > > > > > Free software, free e-mail, and free Internet access for a
month!
> > > > > > > Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
> > > > >
> > > > >
> > > > >
> > >
> > >
> > >
>
>
>

 

[gary miller]

Good point, Scott. Mine didn't have any markings on it so I blew some air
through it to check the direction of the seal. From the compressor side it
should pass air, from the tank side it should not pass air.
Gary
North Bend, Oregon Coast

> Gary, you're giving good advise about the check valve leak problem, and
> especially making sure that the valves are installed in the right direction.
> There is usually an arrow or words to indicate the correct air flow. The
> problem is that arrow indicates the direction of air flow that the valve is
> designed to seal. In our case, it should be pointing toward the compressor,
> because the air flow we want to seal is in the "bag", not the compressor.
>
> I recently rebuilt my solenoid valves and they were both installed backwards
> from the factory!!
>
> Scott Shean
> 78 Royale
> Baton Rouge, LA
>
> >-----Original Message-----
> >From: owner-gmcmotorhome
> >[mailtowner-gmcmotorhome]On Behalf Of Gary Miller
> >Sent: Saturday, July 24, 1999 3:05 PM
> >To: gmcmotorhome
> >Subject: Re: GMC: GMC Motorhome Digest V2 #561
> >
> >
> >Ron,
> >The check valve is (usually) the first thing in the line from the
> >output of the
> >compressor. All the valves I have seen look like a long coupling,
> >usually made
> >of brass but the best ones are SS. They are about 4" long and
> >about 1" square.
> >They tend to corrode with age and will leak allowing your
> >compressed air seep
> >back through the compressor. When replacing be sure to install
> >it so that the
> >air flow is in the correct direction. Jim Bounds sells them and
> >you should
> >also be able to find one in WalMart near the air compressors.
> >
> >Gary
> >North Bend, Oregon Coast
> >Highway crowded with SOBs

 

[scott shean]

Gary, you're giving good advise about the check valve leak problem, and
especially making sure that the valves are installed in the right direction.
There is usually an arrow or words to indicate the correct air flow. The
problem is that arrow indicates the direction of air flow that the valve is
designed to seal. In our case, it should be pointing toward the compressor,
because the air flow we want to seal is in the "bag", not the compressor.

I recently rebuilt my solenoid valves and they were both installed backwards
from the factory!!

Scott Shean
78 Royale
Baton Rouge, LA

>-----Original Message-----
>From: owner-gmcmotorhome
>[mailtowner-gmcmotorhome]On Behalf Of Gary Miller
>Sent: Saturday, July 24, 1999 3:05 PM
>To: gmcmotorhome
>Subject: Re: GMC: GMC Motorhome Digest V2 #561
>
>
>Ron,
>The check valve is (usually) the first thing in the line from the
>output of the
>compressor. All the valves I have seen look like a long coupling,
>usually made
>of brass but the best ones are SS. They are about 4" long and
>about 1" square.
>They tend to corrode with age and will leak allowing your
>compressed air seep
>back through the compressor. When replacing be sure to install
>it so that the
>air flow is in the correct direction. Jim Bounds sells them and
>you should
>also be able to find one in WalMart near the air compressors.
>
>Gary
>North Bend, Oregon Coast
>Highway crowded with SOBs

 

[ron & gina]

Scott, I guess by what your saying there's different types of check valves
with arrows pointing towards the part you want to seal off?? I have never
seen a check of that type. My understanding is the arrow points towards air
flow thus sealing off other end. in my case pointing from compressor into
tk.

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

- ----- Original Message -----
From: Scott Shean
To:
Sent: Monday, July 26, 1999 4:34 PM
Subject: RE: GMC: GMC Motorhome Digest V2 #561

> Gary, you're giving good advise about the check valve leak problem, and
> especially making sure that the valves are installed in the right
direction.
> There is usually an arrow or words to indicate the correct air flow. The
> problem is that arrow indicates the direction of air flow that the valve
is
> designed to seal. In our case, it should be pointing toward the
compressor,
> because the air flow we want to seal is in the "bag", not the compressor.
>
> I recently rebuilt my solenoid valves and they were both installed
backwards
> from the factory!!
>
> Scott Shean
> 78 Royale
> Baton Rouge, LA
>
> >-----Original Message-----
> >From: owner-gmcmotorhome
> >[mailtowner-gmcmotorhome]On Behalf Of Gary Miller
> >Sent: Saturday, July 24, 1999 3:05 PM
> >To: gmcmotorhome
> >Subject: Re: GMC: GMC Motorhome Digest V2 #561
> >
> >
> >Ron,
> >The check valve is (usually) the first thing in the line from the
> >output of the
> >compressor. All the valves I have seen look like a long coupling,
> >usually made
> >of brass but the best ones are SS. They are about 4" long and
> >about 1" square.
> >They tend to corrode with age and will leak allowing your
> >compressed air seep
> >back through the compressor. When replacing be sure to install
> >it so that the
> >air flow is in the correct direction. Jim Bounds sells them and
> >you should
> >also be able to find one in WalMart near the air compressors.
> >
> >Gary
> >North Bend, Oregon Coast
> >Highway crowded with SOBs
>

 

[scott shean]

Ron&Gina

I have enjoyed you posts to the GMCNet, and welcome the opportunity to
assist.

I tend to think that all GMCs are the same because they look the same.
Actually, there are some differences between the years. My system has
"solenoid valves", but no "check valves", and I responded to Gary's recent
comments about "check valves" primarily because he mentioned "installing
them correctly", and I had discovered that mine were installed incorrectly.

I am not very familiar with the 1973-1975 models, which had the "First
Design" air suspension. I looked at the parts book, and found a reference
to a "solenoid valve" listed, but there was no number listed, and I could
not find it in the parts book or the maintenance manual. If they are "check
valves" you can verify their correct orientation by finding out which way
the "prevent" flow. If they are located at the discharge of your
compressor, they must pass air to the tank. If they are "solenoid vales",
they will have electrical connections to them, and they should clearly show
the air flow direction on the body. I didn't see on in the parts book, but
IF you have a solenoid valve at the discharge of your compressor, the arrow
should be pointing toward the compressor, because you want to stop the flow
of air from the tank back to the compressor when the ignition is off, and
the valve is closed.

I hope this is of some help.

Scott Shean
78 Royale
Baton Rouge, LA

>-----Original Message-----
>From: owner-gmcmotorhome
>[mailtowner-gmcmotorhome]On Behalf Of Ron & Gina
>Sent: Monday, July 26, 1999 7:36 PM
>To: gmcmotorhome
>Subject: Re: GMC: GMC Motorhome Digest V2 #561
>
>
>Scott, I guess by what your saying there's different types of check valves
>with arrows pointing towards the part you want to seal off?? I have never
>seen a check of that type. My understanding is the arrow points towards air
>flow thus sealing off other end. in my case pointing from compressor into
>tk.
>
>Ron&Gina
>73 Pumpkin-Rose
>Ft. Mohave, AZ.
>

 

[ron & gina]

Hi Scott, No I have a check valve which was bad replacing in am when its
alittle cooler atleast for a short while if I get up real early. Yea I have
worked on both when I use to work, but retired now with lots of time but few
dimes!!! But fun! the honey do list I believe is fun also for how long I
don't know. Thanks for info.

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

- ----- Original Message -----
From: Scott Shean
To:
Sent: Monday, July 26, 1999 10:27 PM
Subject: RE: GMC: GMC Motorhome Digest V2 #561

> Ron&Gina
>
> I have enjoyed you posts to the GMCNet, and welcome the opportunity to
> assist.
>
> I tend to think that all GMCs are the same because they look the same.
> Actually, there are some differences between the years. My system has
> "solenoid valves", but no "check valves", and I responded to Gary's recent
> comments about "check valves" primarily because he mentioned "installing
> them correctly", and I had discovered that mine were installed
incorrectly.
>
> I am not very familiar with the 1973-1975 models, which had the "First
> Design" air suspension. I looked at the parts book, and found a reference
> to a "solenoid valve" listed, but there was no number listed, and I could
> not find it in the parts book or the maintenance manual. If they are
"check
> valves" you can verify their correct orientation by finding out which way
> the "prevent" flow. If they are located at the discharge of your
> compressor, they must pass air to the tank. If they are "solenoid vales",
> they will have electrical connections to them, and they should clearly
show
> the air flow direction on the body. I didn't see on in the parts book,
but
> IF you have a solenoid valve at the discharge of your compressor, the
arrow
> should be pointing toward the compressor, because you want to stop the
flow
> of air from the tank back to the compressor when the ignition is off, and
> the valve is closed.
>
> I hope this is of some help.
>
> Scott Shean
> 78 Royale
> Baton Rouge, LA
>
> >-----Original Message-----
> >From: owner-gmcmotorhome
> >[mailtowner-gmcmotorhome]On Behalf Of Ron & Gina
> >Sent: Monday, July 26, 1999 7:36 PM
> >To: gmcmotorhome
> >Subject: Re: GMC: GMC Motorhome Digest V2 #561
> >
> >
> >Scott, I guess by what your saying there's different types of check
valves
> >with arrows pointing towards the part you want to seal off?? I have never
> >seen a check of that type. My understanding is the arrow points towards
air
> >flow thus sealing off other end. in my case pointing from compressor into
> >tk.
> >
> >Ron&Gina
> >73 Pumpkin-Rose
> >Ft. Mohave, AZ.
> >
>

 

[ron & gina]

Hi again Scott, Not trying to start anything but maybe the GMC Solenoid
valves are different from what I've seen and just trying to pass info along,
no expert tho!!! But all the solenoid operated valves that I've worked with
shows a direction of flow, and can flow the other way but can cause damage
to valve seat/less flow , and the valve closing is what stops the flow.
Anyhow I could be wrong just passing along the info that I have and if wrong
would want to be corrected. Have a good one

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

- ----- Original Message -----
From: Ron & Gina
To:
Sent: Monday, July 26, 1999 10:45 PM
Subject: Re: GMC: GMC Motorhome Digest V2 #561

> Hi Scott, No I have a check valve which was bad replacing in am when its
> alittle cooler atleast for a short while if I get up real early. Yea I
have
> worked on both when I use to work, but retired now with lots of time but
few
> dimes!!! But fun! the honey do list I believe is fun also for how long I
> don't know. Thanks for info.
>
> Ron&Gina
> 73 Pumpkin-Rose
> Ft. Mohave, AZ.
>
> ----- Original Message -----
> From: Scott Shean
> To:
> Sent: Monday, July 26, 1999 10:27 PM
> Subject: RE: GMC: GMC Motorhome Digest V2 #561
>
>
> > Ron&Gina
> >
> > I have enjoyed you posts to the GMCNet, and welcome the opportunity to
> > assist.
> >
> > I tend to think that all GMCs are the same because they look the same.
> > Actually, there are some differences between the years. My system has
> > "solenoid valves", but no "check valves", and I responded to Gary's
recent
> > comments about "check valves" primarily because he mentioned "installing
> > them correctly", and I had discovered that mine were installed
> incorrectly.
> >
> > I am not very familiar with the 1973-1975 models, which had the "First
> > Design" air suspension. I looked at the parts book, and found a
reference
> > to a "solenoid valve" listed, but there was no number listed, and I
could
> > not find it in the parts book or the maintenance manual. If they are
> "check
> > valves" you can verify their correct orientation by finding out which
way
> > the "prevent" flow. If they are located at the discharge of your
> > compressor, they must pass air to the tank. If they are "solenoid
vales",
> > they will have electrical connections to them, and they should clearly
> show
> > the air flow direction on the body. I didn't see on in the parts book,
> but
> > IF you have a solenoid valve at the discharge of your compressor, the
> arrow
> > should be pointing toward the compressor, because you want to stop the
> flow
> > of air from the tank back to the compressor when the ignition is off,
and
> > the valve is closed.
> >
> > I hope this is of some help.
> >
> > Scott Shean
> > 78 Royale
> > Baton Rouge, LA
> >
> > >-----Original Message-----
> > >From: owner-gmcmotorhome
> > >[mailtowner-gmcmotorhome]On Behalf Of Ron & Gina
> > >Sent: Monday, July 26, 1999 7:36 PM
> > >To: gmcmotorhome
> > >Subject: Re: GMC: GMC Motorhome Digest V2 #561
> > >
> > >
> > >Scott, I guess by what your saying there's different types of check
> valves
> > >with arrows pointing towards the part you want to seal off?? I have
never
> > >seen a check of that type. My understanding is the arrow points towards
> air
> > >flow thus sealing off other end. in my case pointing from compressor
into
> > >tk.
> > >
> > >Ron&Gina
> > >73 Pumpkin-Rose
> > >Ft. Mohave, AZ.
> > >
> >
>
>

 

[william hubert]

Lets not get confused on air systems.
The Electro level II system is quite different from the first system.
Essentially there are two compressors, one for each bag. Each compressor is
fitted with an internal valve which can be electrically controlled. That
valve is energized when the switch or sensor wants to lower the bag. In
theory that is all that should be required. Compressor on to go up valve
open to go down.
BUT the real worl practicality is that th compressor valve system is not
tight enough to prevent small losses of air which would bleed the bags down
over a short time. SO they fitted a high quality electic air valve on each
compresso. These are not check valves as they do not pass air unless
energized. If they were check valves you could not lower the bags.There is
a flow arrow which indicates the design of the valve. The arrow points to
the side designed to provide the best seal when not energized.
This means the correct orientation is for the arrow to point towards the
bags, not the compressor. Remember with the air valve shut and the
compressor off there will soon be no pressure in the compressor.

Finally in our application the solenoid valves seal up well and prevent
flow in either direction so they may function ok if installed backwards.At

>Ron&Gina
>
>I have enjoyed you posts to the GMCNet, and welcome the opportunity to
>assist.
>
>I tend to think that all GMCs are the same because they look the same.
>Actually, there are some differences between the years. My system has
>"solenoid valves", but no "check valves", and I responded to Gary's recent
>comments about "check valves" primarily because he mentioned "installing
>them correctly", and I had discovered that mine were installed incorrectly.
>
>I am not very familiar with the 1973-1975 models, which had the "First
>Design" air suspension. I looked at the parts book, and found a reference
>to a "solenoid valve" listed, but there was no number listed, and I could
>not find it in the parts book or the maintenance manual. If they are "check
>valves" you can verify their correct orientation by finding out which way
>the "prevent" flow. If they are located at the discharge of your
>compressor, they must pass air to the tank. If they are "solenoid vales",
>they will have electrical connections to them, and they should clearly show
>the air flow direction on the body. I didn't see on in the parts book, but
>IF you have a solenoid valve at the discharge of your compressor, the arrow
>should be pointing toward the compressor, because you want to stop the flow
>of air from the tank back to the compressor when the ignition is off, and
>the valve is closed.
>
>I hope this is of some help.
>
>Scott Shean
>78 Royale
>Baton Rouge, LA
>
>>-----Original Message-----
>>From: owner-gmcmotorhome
>>[mailtowner-gmcmotorhome]On Behalf Of Ron & Gina
>>Sent: Monday, July 26, 1999 7:36 PM
>>To: gmcmotorhome
>>Subject: Re: GMC: GMC Motorhome Digest V2 #561
>>
>>
>>Scott, I guess by what your saying there's different types of check valves
>>with arrows pointing towards the part you want to seal off?? I have never
>>seen a check of that type. My understanding is the arrow points towards air
>>flow thus sealing off other end. in my case pointing from compressor into
>>tk.
>>
>>Ron&Gina
>>73 Pumpkin-Rose
>>Ft. Mohave, AZ.
>>
>
>

 

[sam eng]

Duane,

What condition was the air bag in when you replaced it. Try to get an gauge on
that monster.

Thanks,

Sam

Ron & Gina
Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
for repair Dana units (very cost effective). Thomas compressors are a
throw away item since repair parts are not available. Send you time/$$$$
& use it in fixing the air leaks in you existing system & then the Dana
will serve you well. A new Thomas unit will not fix leaks in the system
& will wear out with many turn on cycles required do to the leaks. To me
the Thomas is a wimp in terms of what our GMC needs. The Dana works fine
for our needs.
I repaired my air system (Power Level-now no leaks) 11 years ago
including rebuild of the Dana & rewiring power to Dana......have not
touched it since. Now w/100k miles on it w/o any problems except
replacement of both Air Bags about 2 year ago. This is the results to be
expected with proper air leak repair. My compressor comes on ONCE a day
to pump up the air tank & then never (well almost never) comes on again
all day while using the Travel/Automatic mode.
Purchasing a new Thomas is not going to fix the problems that most GMC
have with the air system....air leaks. Must fix basic problem & then a
rebuild Dana or new Thomas may do some good.
OBTW I plan on a technical presentation addressing the GMC Air Suspension
System at the Western States Roundup in Albuquerque, Oct 5 '99.
Hope to see you there.

Duane Simmons

___________________________________________________________________
Get the Internet just the way you want it.
Free software, free e-mail, and free Internet access for a month!
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[jim white]

Sam
are you from stl

> -----Original Message-----
> From: owner-gmcmotorhome
> [mailtowner-gmcmotorhome]On Behalf Of Sam Eng
> Sent: Tuesday, July 27, 1999 1:38 PM
> To: gmcmotorhome
> Subject: Re: GMC: GMC Motorhome Digest V2 #561
>
>
>
>
> Duane,
>
> What condition was the air bag in when you replaced it. Try to
> get an gauge on
> that monster.
>
> Thanks,
>
> Sam
>
>
>
> Ron & Gina
> Save your $$$$$$$ & keep the Dana Air Compressor. Parts are available
> for repair Dana units (very cost effective). Thomas compressors are a
> throw away item since repair parts are not available. Send you time/$$$$
> & use it in fixing the air leaks in you existing system & then the Dana
> will serve you well. A new Thomas unit will not fix leaks in the system
> & will wear out with many turn on cycles required do to the leaks. To me
> the Thomas is a wimp in terms of what our GMC needs. The Dana works fine
> for our needs.
> I repaired my air system (Power Level-now no leaks) 11 years ago
> including rebuild of the Dana & rewiring power to Dana......have not
> touched it since. Now w/100k miles on it w/o any problems except
> replacement of both Air Bags about 2 year ago. This is the results to be
> expected with proper air leak repair. My compressor comes on ONCE a day
> to pump up the air tank & then never (well almost never) comes on again
> all day while using the Travel/Automatic mode.
> Purchasing a new Thomas is not going to fix the problems that most GMC
> have with the air system....air leaks. Must fix basic problem & then a
> rebuild Dana or new Thomas may do some good.
> OBTW I plan on a technical presentation addressing the GMC Air Suspension
> System at the Western States Roundup in Albuquerque, Oct 5 '99.
> Hope to see you there.
>
> Duane Simmons
>
> ___________________________________________________________________
> Get the Internet just the way you want it.
> Free software, free e-mail, and free Internet access for a month!
> Try Juno Web: http://dl.www.juno.com/dynoget/tagj.
>
>
>
>
>
>

 

[sam eng]

Duane,

No, I am from NJ