GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.
Home » Public Forums » GMCnet » [GMCnet] A/C vacuum pump
Re: [GMCnet] A/C vacuum pump [message #326245 is a reply to message #326244] Wed, 22 November 2017 07:29 Go to previous messageGo to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
Senior Member
Mac,

I would suggest you wait until you need the pump as that way IF it does crap out you'll be covered by the warranty.

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808



-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of D C _Mac_ Macdonald
Sent: Wednesday, November 22, 2017 7:24 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] A/C vacuum pump

I think I'll head for my local Horror Fright store today to buy one of those!


D C "Mac" Macdonald
Amateur Radio K2GKK
Since 30 November '53
USAF and FAA, Retired
Member GMCMI & Classics
Oklahoma City, OK
"The Money Pit"
TZE166V101966
'76 ex-Palm Beach
k2gkk + hotmail dot com



________________________________
From: Gmclist on behalf of Rob Mueller
Sent: Wednesday, November 22, 2017 07:14
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] A/C vacuum pump

Rick,

Thanks!

Glad you took the time to clarify what I was saying.

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Richard Denney
Sent: Tuesday, November 21, 2017 11:24 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] A/C vacuum pump

Let's be sure to keep things straight, as Rob is doing. The electric pump
in the original post will draw down to 75 microns, which is 29.917 inches
of mercury at sea level. I call that a hard vacuum. It won't survive a
shop's duty cycle, perhaps, but it will work for us if we let it run long
enough. I'll bet shops don't pull a harder vacuum, tough a shop-grade pump
might get there faster.

The air-pressure-operated venturi pump that Tyler posted is the one Matt
(and Rob) warned against. It does not pull a hard enough vacuum to dry an
AC system.

Rick "who got confused" Denney

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

Report message to a moderator

[Message index]
 
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Aluminum intake manifold-opinions..
Next Topic: [GMCnet] FrostyCool 12a Refrigerant
Goto Forum:
  


Current Time: Sat Jun 22 22:40:29 CDT 2024

Total time taken to generate the page: 0.00867 seconds
.:: Contact :: Home ::.

Powered by: FUDforum 3.1.1.
Copyright ©2001-2021 FUDforum Bulletin Board Software