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Vacuum gage

 
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GrummanDude



Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
PostPosted: Thu Apr 30, 2009 9:48 pm    Post subject: Vacuum gage Reply with quote
This one should be easy.

A new owner of an AA1B came in with the vacuum gage reading at the high
end of the gage. My first thought was the regulator. When I crawled
under the panel (no easy feat in a two-seater) I noticed there was only
one vacuum line going to the gage and the source was the one port on
the back of the AI. I looked on mine and the fitting on the AI from
the filter (on mine) has a Tee on it going to the vacuum gage and also
a fitting on the AI going to the vacuum gage.

I looked at a couple of hardware sources and I can't find the
hose-T-fitting (pipe thread for the AI, 3/8 inch hose fitting to the
vacuum filter, hose fitting for the vacuum gage) that goes on the back
of the AI. It looks like a special fitting. I called Fletchair to see
if they had one from an old AI and they didn't.

Any suggestions?

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PostPosted: Fri May 01, 2009 3:43 am    Post subject: Vacuum gage Reply with quote
teamgrumman(at)aol.com wrote:
Quote:


This one should be easy.
Surely you jest!!!

Quote:

A new owner of an AA1B came in with the vacuum gage reading at the high
end of the gage. My first thought was the regulator. When I crawled
under the panel (no easy feat in a two-seater) I noticed there was only
one vacuum line going to the gage and the source was the one port on the
back of the AI. I looked on mine and the fitting on the AI from the
filter (on mine) has a Tee on it going to the vacuum gage and also a
fitting on the AI going to the vacuum gage.

I looked at a couple of hardware sources and I can't find the
hose-T-fitting (pipe thread for the AI, 3/8 inch hose fitting to the
vacuum filter, hose fitting for the vacuum gage) that goes on the back
of the AI. It looks like a special fitting. I called Fletchair to see
if they had one from an old AI and they didn't.

Any suggestions?
Ace Hardware. I find all kinds of stuff there ..... or something I can

modify to my needs.
Linn
Quote:




------------------------------------------------------------------------


Checked by AVG - www.avg.com



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az_gila



Joined: 17 Jun 2006
Posts: 99
Location: Tucson, AZ
PostPosted: Fri May 01, 2009 11:50 am    Post subject: Vacuum gage Reply with quote
Gary... if I understand the description, isn't it the RA1K31-4-6-4 part half way down the left side of this Spruce catalog page?

http://www.aircraftspruce.com/pdf/2009Individual/Cat09390.pdf

..a mere $24.... or $25.50 if you want to get it from Chief with no CA sales tax....:^)

http://www.chiefaircraft.com/airsec/Aircraft/VacuumSystem/RapcoFittings.html

gil A





[quote]This one should be easy.


I looked at a couple of hardware sources and I can't find the hose-T-fitting (pipe thread for the AI, 3/8 inch hose fitting to the vacuum filter, hose fitting for the vacuum gage) that goes on the back of the AI. It looks like a special fitting. I called Fletchair to see if they had one from an old AI and they didn't.
[b]

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GrummanDude



Joined: 15 Jan 2006
Posts: 926
Location: Auburn, CA
PostPosted: Fri May 01, 2009 11:05 pm    Post subject: Vacuum gage Reply with quote
RA1K31-4-6-4

Yep, that's the one.
--

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