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+--- Thread: air leak/vacuum generator leak (/showthread.php?tid=3378)
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air leak/vacuum generator leak - Richard Hayden - 09-09-2006 07:52
Wouldn't the unknown hose be the air to run the vac generator?
Dick Hayden - '87 PT 38 - Lake Stevens, WA
----- Original Message -----
From: davidkerryedwards
To: WanderlodgeForum@yahoogroups.com
Sent: Saturday, September 09, 2006 12:46 PM
Subject: [WanderlodgeForum] Re: air leak/vacuum generator leak
There are two vacuum (?) hoses coming off the generator. One goes to
the cruise, the other to ???. The air system schematics that came
with my coach don't show any of that circuit as far as I can see.
Perhaps the second hose is a return line to catch the compressed air
after it produces a vacuum?
I'm guessing it's sole pupose is for the cruise control, replacing the
electric vacuum pump that was the source of vacuum in earlier years.
You should be able to tell if yours is working by testing the input
vacuum line into the vacuum canister on the top left of the engine.
If you have enough vacuum there, that's not your problem.
Kerry
82 FC 35
Denver
--- In
WanderlodgeForum@yahoogroups.com
cfsomers@... wrote:
>
> I am new to all the details on the bluebirds, but my cruise stopped
> working out of the blue going down the road. what is this vacumm
generator
> and is it's sole purpose to run the cruise?
>
> Chuck S
> 81FC35SB
> Florida
>
>
> > I think someone wrote earlier that the device will 'leak' if there is
> > a vacuum leak in the cruise control system. This makes sense. My next
> > test will be to remove the input vacuum line from the cruise control,
> > plug it and see if it stops the air leak.
> >
> > Kerry
> > 82 FC 35
> > Denver
> >
> > --- In
WanderlodgeForum@yahoogroups.com
"Stephen H" <share@> wrote:
> >>
> >> Kerry,
> >>
> >>
> >>
> >> My 81 does the same thing. After shutting off the engine, it will
> > make a air
> >> leak sound for a little while, that changes when the lines are
> > moved. It has
> >> been awhile since I have looked at it, but if memory serves- I have
> > the same
> >> device, with a leaking sound coming from a empty port as well. I
will be
> >> monitoring this post for a repair and or replacement for the device.
> > Let me
> >>
> >>
> >>
> >>
> >> Stephen H
> >>
> >> 81 FC-33SB
> >>
> >> Plant City, FL
> >>
> >>
> >>
> >>
> >>
> >> _____
> >>
> >> From:
WanderlodgeForum@yahoogroups.com
> >>
[mailto:WanderlodgeForum@yahoogroups.com
davidkerryedwards
> >> Sent: Friday, September 08, 2006 2:55 PM
> >> To:
WanderlodgeForum@yahoogroups.com
> >> Subject: [WanderlodgeForum] air leak/vacuum generator leak
> >>
> >>
> >>
> >> I investiagted my air leak a little more. It does appear to be the
> >> vacuum generator mounted on the bottom of an air manifold behind the
> >> bumper. Air is coming out of the one of the fittings that has never
> >> had a hose on it. When I plug that fitting, the air must backfeed
> >> thru the cruise control vacuum system because it blows the hose off
> >> the vacuum canister on the engine. Do I need to replace the vacuum
> >> generator (if that is what it is)? If so, where would I purchase a
> >> replacement?
> >>
> >> Kerry Edwards
> >> 82 FC 35
> >> Denver
> >>
> >>
> >>
> >>
> >>
> >> [Non-text portions of this message have been removed]
> >>
> >
> >
> >
> >
> >
> >
>
[Non-text portions of this message have been removed]
air leak/vacuum generator leak - davidkerryedwards - 09-09-2006 08:01
The generator screws directly into an air manifold, receiving it's air
thru that threaded connection. (at least on my coach). It has three
barbed outlets. One to the cruise control, one to ??, one with
nothing attached. Air was leaking out of unused fitting on mine.
Once I took it apart and reassembled it (partly) that leak stopped
when I tested it by blowing thru it. I suspect the plastic needle
valve was stuck.
Kerry
82 FC 35
Denver
--- In WanderlodgeForum@yahoogroups.com, "Richard Hayden"
>
> Wouldn't the unknown hose be the air to run the vac generator?
>
> Dick Hayden - '87 PT 38 - Lake Stevens, WA
> ----- Original Message -----
> From: davidkerryedwards
> To:
WanderlodgeForum@yahoogroups.com
> Sent: Saturday, September 09, 2006 12:46 PM
> Subject: [WanderlodgeForum] Re: air leak/vacuum generator leak
>
>
> There are two vacuum (?) hoses coming off the generator. One goes to
> the cruise, the other to ???. The air system schematics that came
> with my coach don't show any of that circuit as far as I can see.
> Perhaps the second hose is a return line to catch the compressed air
> after it produces a vacuum?
> I'm guessing it's sole pupose is for the cruise control, replacing the
> electric vacuum pump that was the source of vacuum in earlier years.
> You should be able to tell if yours is working by testing the input
> vacuum line into the vacuum canister on the top left of the engine.
> If you have enough vacuum there, that's not your problem.
>
> Kerry
> 82 FC 35
> Denver
>
> --- In
WanderlodgeForum@yahoogroups.com
cfsomers@ wrote:
> >
> > I am new to all the details on the bluebirds, but my cruise stopped
> > working out of the blue going down the road. what is this vacumm
> generator
> > and is it's sole purpose to run the cruise?
> >
> > Chuck S
> > 81FC35SB
> > Florida
> >
> >
> > > I think someone wrote earlier that the device will 'leak' if
there is
> > > a vacuum leak in the cruise control system. This makes sense.
My next
> > > test will be to remove the input vacuum line from the cruise
control,
> > > plug it and see if it stops the air leak.
> > >
> > > Kerry
> > > 82 FC 35
> > > Denver
> > >
> > > --- In
WanderlodgeForum@yahoogroups.com
"Stephen H" <share@> wrote:
> > >>
> > >> Kerry,
> > >>
> > >>
> > >>
> > >> My 81 does the same thing. After shutting off the engine, it will
> > > make a air
> > >> leak sound for a little while, that changes when the lines are
> > > moved. It has
> > >> been awhile since I have looked at it, but if memory serves-
I have
> > > the same
> > >> device, with a leaking sound coming from a empty port as well. I
> will be
> > >> monitoring this post for a repair and or replacement for the
device.
> > > Let me
> > >>
> > >>
> > >>
> > >>
> > >> Stephen H
> > >>
> > >> 81 FC-33SB
> > >>
> > >> Plant City, FL
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> _____
> > >>
> > >> From:
WanderlodgeForum@yahoogroups.com
> > >>
[mailto:WanderlodgeForum@yahoogroups.com
On Behalf Of
> davidkerryedwards
> > >> Sent: Friday, September 08, 2006 2:55 PM
> > >> To:
WanderlodgeForum@yahoogroups.com
> > >> Subject: [WanderlodgeForum] air leak/vacuum generator leak
> > >>
> > >>
> > >>
> > >> I investiagted my air leak a little more. It does appear to
be the
> > >> vacuum generator mounted on the bottom of an air manifold
behind the
> > >> bumper. Air is coming out of the one of the fittings that has
never
> > >> had a hose on it. When I plug that fitting, the air must backfeed
> > >> thru the cruise control vacuum system because it blows the
hose off
> > >> the vacuum canister on the engine. Do I need to replace the
vacuum
> > >> generator (if that is what it is)? If so, where would I
purchase a
> > >> replacement?
> > >>
> > >> Kerry Edwards
> > >> 82 FC 35
> > >> Denver
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> [Non-text portions of this message have been removed]
> > >>
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
air leak/vacuum generator leak - Richard Hayden - 09-09-2006 08:17
When that happened on my FC, the air continuously expelled from the vacant
fitting, the vac generator was replaced and the symptom stopped. However, I
must tell you the rest of the story, though it would then engage, the cc would
surge so badly that it couldn't be used. I think that was a low voltage problem
but I never tackled that problem.
Good luck.
Dick Hayden - '87 PT 38 - Lake Stevens, WA
----- Original Message -----
From: davidkerryedwards
To: WanderlodgeForum@yahoogroups.com
Sent: Saturday, September 09, 2006 1:01 PM
Subject: [WanderlodgeForum] Re: air leak/vacuum generator leak
The generator screws directly into an air manifold, receiving it's air
thru that threaded connection. (at least on my coach). It has three
barbed outlets. One to the cruise control, one to ??, one with
nothing attached. Air was leaking out of unused fitting on mine.
Once I took it apart and reassembled it (partly) that leak stopped
when I tested it by blowing thru it. I suspect the plastic needle
valve was stuck.
Kerry
82 FC 35
Denver
--- In
WanderlodgeForum@yahoogroups.com
"Richard Hayden"
>
> Wouldn't the unknown hose be the air to run the vac generator?
>
> Dick Hayden - '87 PT 38 - Lake Stevens, WA
> ----- Original Message -----
> From: davidkerryedwards
> To:
WanderlodgeForum@yahoogroups.com
> Sent: Saturday, September 09, 2006 12:46 PM
> Subject: [WanderlodgeForum] Re: air leak/vacuum generator leak
>
>
> There are two vacuum (?) hoses coming off the generator. One goes to
> the cruise, the other to ???. The air system schematics that came
> with my coach don't show any of that circuit as far as I can see.
> Perhaps the second hose is a return line to catch the compressed air
> after it produces a vacuum?
> I'm guessing it's sole pupose is for the cruise control, replacing the
> electric vacuum pump that was the source of vacuum in earlier years.
> You should be able to tell if yours is working by testing the input
> vacuum line into the vacuum canister on the top left of the engine.
> If you have enough vacuum there, that's not your problem.
>
> Kerry
> 82 FC 35
> Denver
>
> --- In
WanderlodgeForum@yahoogroups.com
cfsomers@ wrote:
> >
> > I am new to all the details on the bluebirds, but my cruise stopped
> > working out of the blue going down the road. what is this vacumm
> generator
> > and is it's sole purpose to run the cruise?
> >
> > Chuck S
> > 81FC35SB
> > Florida
> >
> >
> > > I think someone wrote earlier that the device will 'leak' if
there is
> > > a vacuum leak in the cruise control system. This makes sense.
My next
> > > test will be to remove the input vacuum line from the cruise
control,
> > > plug it and see if it stops the air leak.
> > >
> > > Kerry
> > > 82 FC 35
> > > Denver
> > >
> > > --- In
WanderlodgeForum@yahoogroups.com
"Stephen H" <share@> wrote:
> > >>
> > >> Kerry,
> > >>
> > >>
> > >>
> > >> My 81 does the same thing. After shutting off the engine, it will
> > > make a air
> > >> leak sound for a little while, that changes when the lines are
> > > moved. It has
> > >> been awhile since I have looked at it, but if memory serves-
I have
> > > the same
> > >> device, with a leaking sound coming from a empty port as well. I
> will be
> > >> monitoring this post for a repair and or replacement for the
device.
> > > Let me
> > >>
> > >>
> > >>
> > >>
> > >> Stephen H
> > >>
> > >> 81 FC-33SB
> > >>
> > >> Plant City, FL
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> _____
> > >>
> > >> From:
WanderlodgeForum@yahoogroups.com
> > >>
[mailto:WanderlodgeForum@yahoogroups.com
On Behalf Of
> davidkerryedwards
> > >> Sent: Friday, September 08, 2006 2:55 PM
> > >> To:
WanderlodgeForum@yahoogroups.com
> > >> Subject: [WanderlodgeForum] air leak/vacuum generator leak
> > >>
> > >>
> > >>
> > >> I investiagted my air leak a little more. It does appear to
be the
> > >> vacuum generator mounted on the bottom of an air manifold
behind the
> > >> bumper. Air is coming out of the one of the fittings that has
never
> > >> had a hose on it. When I plug that fitting, the air must backfeed
> > >> thru the cruise control vacuum system because it blows the
hose off
> > >> the vacuum canister on the engine. Do I need to replace the
vacuum
> > >> generator (if that is what it is)? If so, where would I
purchase a
> > >> replacement?
> > >>
> > >> Kerry Edwards
> > >> 82 FC 35
> > >> Denver
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> [Non-text portions of this message have been removed]
> > >>
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
[Non-text portions of this message have been removed]
air leak/vacuum generator leak - davidkerryedwards - 09-09-2006 09:26
My cruise control has been working but not correctly. It surges or
cuts out unless I just keep slight pressure on the accelerator, then
it seems to work ok. We'll see what happens once I fix the vacuum
generator.
Kerry
82 FC 35
Denver
--- In WanderlodgeForum@yahoogroups.com, "Richard Hayden"
>
> When that happened on my FC, the air continuously expelled from the
vacant fitting, the vac generator was replaced and the symptom
stopped. However, I must tell you the rest of the story, though it
would then engage, the cc would surge so badly that it couldn't be
used. I think that was a low voltage problem but I never tackled that
problem.
>
> Good luck.
> Dick Hayden - '87 PT 38 - Lake Stevens, WA
>
>
air leak/vacuum generator leak - Richard Hayden - 09-09-2006 11:57
Good luck Kerry.
Dick Hayden - '87 PT 38 - Lake Stevens, WA
----- Original Message -----
From: davidkerryedwards
To: WanderlodgeForum@yahoogroups.com
Sent: Saturday, September 09, 2006 2:26 PM
Subject: [WanderlodgeForum] Re: air leak/vacuum generator leak
My cruise control has been working but not correctly. It surges or
cuts out unless I just keep slight pressure on the accelerator, then
it seems to work ok. We'll see what happens once I fix the vacuum
generator.
Kerry
82 FC 35
Denver
--- In
WanderlodgeForum@yahoogroups.com
"Richard Hayden"
>
> When that happened on my FC, the air continuously expelled from the
vacant fitting, the vac generator was replaced and the symptom
stopped. However, I must tell you the rest of the story, though it
would then engage, the cc would surge so badly that it couldn't be
used. I think that was a low voltage problem but I never tackled that
problem.
>
> Good luck.
> Dick Hayden - '87 PT 38 - Lake Stevens, WA
>
>
[Non-text portions of this message have been removed]