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Re: [GMCnet] A/C vacuum pump [message #326214 is a reply to message #326213] Tue, 21 November 2017 14:36 Go to previous messageGo to previous message
Dave Stragand is currently offline  Dave Stragand   United States
Messages: 307
Registered: October 2017
Karma:
Senior Member
I used an older version of the same unit. IIRC they did not have an
anti-reverse valve of any type, so they can suck air back in to the A/C
system as soon as you disconnect the air supply to the tool. Make sure
to disconnect the line at the A/C's vehicle connection before turning
off the pump.

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of
Kingsley Coach
Sent: Tuesday, November 21, 2017 2:22 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] A/C vacuum pump

Tyler

You've just answered a question I was embarrassed to ask !!

I bought one of those several years ago and never tried it..it looked to
cheap to effectively do anything. I think the last time I looked, it
was somewhere in the area of where I keep A/C stuff, which is under the
trailer wiring stuff I think, which is right under the last box of crap
from my long gone and forgotten Airstream....

Thanks

Mike from NS


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On Tue, Nov 21, 2017 at 1:35 PM, Tyler wrote:

> If you are really on a budget I have used
>
> https://www.harborfreight.com/air-vacuum-pump-with-r134a-
> and-r12-connectors-96677.html
>
> the 18$ (and maybe a coupon cheaper) version with satisfactory results

> on several systems. As good? nope. 70% as good for 15% price? yep. and

> certainly good enough to know if system is leaking. A big air
> compressor helps a lot. I used to use it on a 10 gallon one...let it
> charge the air tank, discharge the vacuum pump, shut off vacuum, and
> recharge air. almost like bleeding brakes old style. 80 gallon air
> now, let er rip
>
>
> --
> 1975 Glenbrook, 1978 Royale rear bath
> Raleigh, NC
>
> _______________________________________________
> GMCnet mailing list
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>



--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS

Life is too short to hold a grudge; slash some tires and call it even !
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1978 Transmode (403) Pittsburgh, PA

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