Air leak help needed

[ttikalsky]

Not sure what the part is that the air is leaking from but hopefully
someone here does. Under the front left corner near the steering
gearbox is a black flat "device" with 4 air/vacum line connections.
There is a fifth nipple that is constantly evacuating air. The rear
suspension drops when I shutdown the main engine. Sometimes the front
suspension also drops and one time the air brake system pressure drain
and the suspension remain inflated. I am guessing the black unit is a
diaphram for pressure balancing but not sure. Anyone know what this
is and where I can get a replacement?

Troy, Waconia MN 83FC33

[Tom Warner]

Its the valve for your cruise control. I would check all of the connections
on the top of the engine where the cruise control is located.

tom
1982 FC35
Vernon Center,NY

At 02:08 PM 7/15/2005 +0000, you wrote:
>Not sure what the part is that the air is leaking from but hopefully
>someone here does. Under the front left corner near the steering
>gearbox is a black flat "device" with 4 air/vacum line connections.
>There is a fifth nipple that is constantly evacuating air. The rear
>suspension drops when I shutdown the main engine. Sometimes the front
>suspension also drops and one time the air brake system pressure drain
>and the suspension remain inflated. I am guessing the black unit is a
>diaphram for pressure balancing but not sure. Anyone know what this
>is and where I can get a replacement?
>
>Troy, Waconia MN 83FC33
>
>
> >
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[ttikalsky]

Thanks, that figures because I was troubleshooting the cruise last
week and pulled the power wire from the harness, so I ran a power wire
directly to the red power wire that leads to the switch. Could it be
the power wire in the harness split inside the harness and now I am
missing the power to a componenet? The wire harness is inside the
tube that leads from beneath the steering wheel and is VERY tight. I
had to pull hard to access the wires from either side.

Troy, 83FC33

--- In WanderlodgeForum@yahoogroups.com, Tom Warner wrote:
> Its the valve for your cruise control. I would check all of the
connections
> on the top of the engine where the cruise control is located.
>
> tom
> 1982 FC35
> Vernon Center,NY
>
> At 02:08 PM 7/15/2005 +0000, you wrote:
> >Not sure what the part is that the air is leaking from but hopefully
> >someone here does. Under the front left corner near the steering
> >gearbox is a black flat "device" with 4 air/vacum line connections.
> >There is a fifth nipple that is constantly evacuating air. The rear
> >suspension drops when I shutdown the main engine. Sometimes the front
> >suspension also drops and one time the air brake system pressure drain
> >and the suspension remain inflated. I am guessing the black unit is a
> >diaphram for pressure balancing but not sure. Anyone know what this
> >is and where I can get a replacement?
> >
> >Troy, Waconia MN 83FC33
> >
> >
> > > >
> >----------
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> >
> >
> >----------

[Tom Warner]

Its possible. But I would still carefully check the air lines into and out
of your cruise control module near the back of the doghouse.

tom
1982 FC35
Vernon Center,NY

At 05:47 PM 7/15/2005 +0000, you wrote:
>Thanks, that figures because I was troubleshooting the cruise last
>week and pulled the power wire from the harness, so I ran a power wire
>directly to the red power wire that leads to the switch. Could it be
>the power wire in the harness split inside the harness and now I am
>missing the power to a componenet? The wire harness is inside the
>tube that leads from beneath the steering wheel and is VERY tight. I
>had to pull hard to access the wires from either side.
>
>Troy, 83FC33
>
>--- In WanderlodgeForum@yahoogroups.com, Tom Warner wrote:
> > Its the valve for your cruise control. I would check all of the
>connections
> > on the top of the engine where the cruise control is located.
> >
> > tom
> > 1982 FC35
> > Vernon Center,NY
> >
> > At 02:08 PM 7/15/2005 +0000, you wrote:
> > >Not sure what the part is that the air is leaking from but hopefully
> > >someone here does. Under the front left corner near the steering
> > >gearbox is a black flat "device" with 4 air/vacum line connections.
> > >There is a fifth nipple that is constantly evacuating air. The rear
> > >suspension drops when I shutdown the main engine. Sometimes the front
> > >suspension also drops and one time the air brake system pressure drain
> > >and the suspension remain inflated. I am guessing the black unit is a
> > >diaphram for pressure balancing but not sure. Anyone know what this
> > >is and where I can get a replacement?
> > >
> > >Troy, Waconia MN 83FC33
> > >
> > >
> > > > > >
> > >----------
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[Chuck Wheeler]

On my 82 the device you describe is the vacuum generator for the cruise
control. If you have a vacuum leak it will discharge air all the time
whiled it tries to build the vacuum back up.



Chuck Wheeler

82FC31 Fort Worth



-----Original Message-----
From: WanderlodgeForum@yahoogroups.com
[mailto:WanderlodgeForum@yahoogroups.com] On Behalf Of ttikalsky
Sent: Friday, July 15, 2005 8:08 AM
To: WanderlodgeForum@yahoogroups.com
Subject: [WanderlodgeForum] Air leak help needed



Not sure what the part is that the air is leaking from but hopefully
someone here does. Under the front left corner near the steering
gearbox is a black flat "device" with 4 air/vacum line connections.
There is a fifth nipple that is constantly evacuating air. The rear
suspension drops when I shutdown the main engine. Sometimes the front
suspension also drops and one time the air brake system pressure drain
and the suspension remain inflated. I am guessing the black unit is a
diaphram for pressure balancing but not sure. Anyone know what this
is and where I can get a replacement?

Troy, Waconia MN 83FC33





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[Non-text portions of this message have been removed]

[Jeff August]

Ours hisses from time to time after it is shut down, don't know why but
it only does it for a few seconds at a time. When people ask me what is
that I tell them it is alive and it thinks your standing to close! I
checked all the vacuum lines from the brake peddle to the engine and
they all seem OK, does seem to drain the air from the tank for the
step, generator tray and steering wheel.
Jeff & Michelle August
80FC35RB
Plymouth Wi.
--- In WanderlodgeForum@yahoogroups.com, "ttikalsky"
wrote:
> Not sure what the part is that the air is leaking from but hopefully
> someone here does. Under the front left corner near the steering
> gearbox is a black flat "device" with 4 air/vacum line connections.
> There is a fifth nipple that is constantly evacuating air. The rear
> suspension drops when I shutdown the main engine. Sometimes the front
> suspension also drops and one time the air brake system pressure drain
> and the suspension remain inflated. I am guessing the black unit is a
> diaphram for pressure balancing but not sure. Anyone know what this
> is and where I can get a replacement?
>
> Troy, Waconia MN 83FC33

[Byrne Lobdell]

The device is what is known as a jet pump and is used to create vacume for the
cruse control and other automotive devices that require vacume. The device is
preset to shut of at around 15" vac. If you have a vacume leak it will continue
to run (blow air out). One line should go the vacume tank and the others to
devices requireing vac. Cap off lines till the air stopes blowing and that line
should be the trouble. Byrne 7735fc

Jeff August wrote:Ours hisses from time to time after it is
shut down, don't know why but
it only does it for a few seconds at a time. When people ask me what is
that I tell them it is alive and it thinks your standing to close! I
checked all the vacuum lines from the brake peddle to the engine and
they all seem OK, does seem to drain the air from the tank for the
step, generator tray and steering wheel.
Jeff & Michelle August
80FC35RB
Plymouth Wi.
--- In WanderlodgeForum@yahoogroups.com, "ttikalsky"
wrote:
> Not sure what the part is that the air is leaking from but hopefully
> someone here does. Under the front left corner near the steering
> gearbox is a black flat "device" with 4 air/vacum line connections.
> There is a fifth nipple that is constantly evacuating air. The rear
> suspension drops when I shutdown the main engine. Sometimes the front
> suspension also drops and one time the air brake system pressure drain
> and the suspension remain inflated. I am guessing the black unit is a
> diaphram for pressure balancing but not sure. Anyone know what this
> is and where I can get a replacement?
>
> Troy, Waconia MN 83FC33




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[Byrne Lobdell]

The device is what is known as a jet pump and is used to create vacume for the
cruse control and other automotive devices that require vacume. The device is
preset to shut of at around 15" vac. If you have a vacume leak it will continue
to run (blow air out). One line should go the vacume tank and the others to
devices requireing vac. Cap off lines till the air stopes blowing and that line
should be the trouble. Byrne 7735fc

Jeff August wrote: Ours hisses from time to time after it
is shut down, don't know why but
it only does it for a few seconds at a time. When people ask me what is
that I tell them it is alive and it thinks your standing to close! I
checked all the vacuum lines from the brake peddle to the engine and
they all seem OK, does seem to drain the air from the tank for the
step, generator tray and steering wheel.
Jeff & Michelle August
80FC35RB
Plymouth Wi.
--- In WanderlodgeForum@yahoogroups.com, "ttikalsky"
wrote:
> Not sure what the part is that the air is leaking from but hopefully
> someone here does. Under the front left corner near the steering
> gearbox is a black flat "device" with 4 air/vacum line connections.
> There is a fifth nipple that is constantly evacuating air. The rear
> suspension drops when I shutdown the main engine. Sometimes the front
> suspension also drops and one time the air brake system pressure drain
> and the suspension remain inflated. I am guessing the black unit is a
> diaphram for pressure balancing but not sure. Anyone know what this
> is and where I can get a replacement?
>
> Troy, Waconia MN 83FC33




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[bascom1968]

Does my 77FC31 have this device? It leaks air and you can hear it in
the front. My cruise lights up and makes noise but doesnt work. Thanks.
JB Lewis Grand Lake Oklahoma








--- In WanderlodgeForum@yahoogroups.com, "ttikalsky"
wrote:
> Not sure what the part is that the air is leaking from but hopefully
> someone here does. Under the front left corner near the steering
> gearbox is a black flat "device" with 4 air/vacum line connections.
> There is a fifth nipple that is constantly evacuating air. The rear
> suspension drops when I shutdown the main engine. Sometimes the front
> suspension also drops and one time the air brake system pressure drain
> and the suspension remain inflated. I am guessing the black unit is a
> diaphram for pressure balancing but not sure. Anyone know what this
> is and where I can get a replacement?
>
> Troy, Waconia MN 83FC33

[Byrne Lobdell]

JB; My 77 came with an electric vacume pump and I updated to the jet pump many
years ago. I jet pump will cut off when the vac reaches 15" and the air will
stop coming out till the next cycle. If there is a vac. leak the pump will
continue to blow air. Byrne 77fc35

bascom1968 wrote:Does my 77FC31 have this device? It leaks
air and you can hear it in
the front. My cruise lights up and makes noise but doesnt work. Thanks.
JB Lewis Grand Lake Oklahoma








--- In WanderlodgeForum@yahoogroups.com, "ttikalsky"
wrote:
> Not sure what the part is that the air is leaking from but hopefully
> someone here does. Under the front left corner near the steering
> gearbox is a black flat "device" with 4 air/vacum line connections.
> There is a fifth nipple that is constantly evacuating air. The rear
> suspension drops when I shutdown the main engine. Sometimes the front
> suspension also drops and one time the air brake system pressure drain
> and the suspension remain inflated. I am guessing the black unit is a
> diaphram for pressure balancing but not sure. Anyone know what this
> is and where I can get a replacement?
>
> Troy, Waconia MN 83FC33






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