72 A/C vacuum line diagram - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ezstriper · 05-30-2013, 10:01 AM

Just ended up with a very nice 72 w/factory A/C unit works but there is no vacuum lines running to the inside at all..the canister is on the case...I can see a vacuum motor on the pass side with nothing going to it...so hoping somebody has a diagram for one of these...thanks Rob

KEL · 05-30-2013, 10:37 AM

Here ya go

ezstriper · 05-30-2013, 10:48 AM

thanks !!!!

KEL · 05-30-2013, 10:59 AM

my pleasure

SS Tim · 05-30-2013, 02:05 PM

Welcome to the board!
Here is a link where you can download the service manuals. They have a lot of A/C information.
http://67-72chevytrucks.com/vboard/s...d.php?t=558016

ezstriper · 05-30-2013, 03:39 PM

thanks...have to figure out what I have...the A/C compressor' lines, dryer, not factory, evaporator case ??? inside was original A/C truck...all that appears correct, do no see the outside air door diaphragm at all...the RIC diaphragm is there..controls are correct I believe...thanks again for all the help ! Rob

KEL · 05-30-2013, 04:24 PM

Sorry
Didn't even notice you were new
Welcome !

ezstriper · 05-30-2013, 06:00 PM

Oh...no problem...been on many sites regularly....just found this after getting this truck...anybody know where the outside air door diaphragm is supposed to be ?? thanks !

SS Tim · 05-30-2013, 06:42 PM

Here they are...

tommys72 · 05-30-2013, 08:05 PM

Not to jack the thread, but what controls the pass. side inside air vent, mine quit working on me
Posted via Mobile Device

SS Tim · 05-30-2013, 09:04 PM

Quote:

Originally Posted by tommys72

Not to jack the thread, but what controls the pass. side inside air vent, mine quit working on me

Take a look at the vacuum map in post #2. The control head switch controls the vacuum to all the vacuum motors and the coolant valve. If the recirculation vacuum motor is not working, I'd check it first with a hand vacuum pump and work backward from there. You need to be reading the service manual to diagnose this vs throwing parts at it. Could be the motor, switch, hoses, or source vacuum.

lugnuts09 · 09-27-2017, 11:05 AM

Is there a kit for the vacuum hoses? If so do you know where i can get it? I'm restoring a 1969 c20

Andy4639 · 09-27-2017, 12:09 PM

I've never seen a kit.

05-30-2013, 10:01 AM	#1
ezstriper Registered User Join Date: May 2013 Location: fredericksburg Posts: 26	72 A/C vacuum line diagram Just ended up with a very nice 72 w/factory A/C unit works but there is no vacuum lines running to the inside at all..the canister is on the case...I can see a vacuum motor on the pass side with nothing going to it...so hoping somebody has a diagram for one of these...thanks Rob

05-30-2013, 10:48 AM	#3
ezstriper Registered User Join Date: May 2013 Location: fredericksburg Posts: 26	Re: 72 A/C vacuum line diagram thanks !!!!

05-30-2013, 10:59 AM	#4
KEL 72 GMC Join Date: Feb 2008 Location: Wells, Maine Posts: 534	Re: 72 A/C vacuum line diagram my pleasure

05-30-2013, 02:05 PM	#5
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: 72 A/C vacuum line diagram Welcome to the board! Here is a link where you can download the service manuals. They have a lot of A/C information. http://67-72chevytrucks.com/vboard/s...d.php?t=558016 __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

05-30-2013, 03:39 PM	#6
ezstriper Registered User Join Date: May 2013 Location: fredericksburg Posts: 26	Re: 72 A/C vacuum line diagram thanks...have to figure out what I have...the A/C compressor' lines, dryer, not factory, evaporator case ??? inside was original A/C truck...all that appears correct, do no see the outside air door diaphragm at all...the RIC diaphragm is there..controls are correct I believe...thanks again for all the help ! Rob

05-30-2013, 10:37 AM	#2
KEL 72 GMC Join Date: Feb 2008 Location: Wells, Maine Posts: 534	Re: 72 A/C vacuum line diagram Here ya go Attached Images

05-30-2013, 04:24 PM	#7
KEL 72 GMC Join Date: Feb 2008 Location: Wells, Maine Posts: 534	Re: 72 A/C vacuum line diagram Sorry Didn't even notice you were new Welcome !

05-30-2013, 06:00 PM	#8
ezstriper Registered User Join Date: May 2013 Location: fredericksburg Posts: 26	Re: 72 A/C vacuum line diagram Oh...no problem...been on many sites regularly....just found this after getting this truck...anybody know where the outside air door diaphragm is supposed to be ?? thanks !

05-30-2013, 06:42 PM	#9
SS Tim Registered User Join Date: Aug 2010 Location: Edwards, CA Posts: 7,503	Re: 72 A/C vacuum line diagram Here they are... Attached Images __________________ Thanks, Tim * VIN/Model Decoders * Power Team Charts (engine/transmission/gear ratio) * Post Your Pickup SPID Blazer SPID Suburban/Panel SPID * RTFM ... Read The Factory Manuals... download 'em here Highlanders Do you have a 1972 Plaid Pickup? Plaid Blazer ** Plaid Suburban

05-30-2013, 08:05 PM	#10
tommys72 Registered User Join Date: Jun 2012 Location: springfield mo Posts: 3,075	Re: 72 A/C vacuum line diagram Not to jack the thread, but what controls the pass. side inside air vent, mine quit working on me Posted via Mobile Device __________________ United States Marine Corps 2000-2011 Iraq and Afghanistan veteran Just living life now and enjoying it and my wife, daughter and son

09-27-2017, 11:05 AM	#12
lugnuts09 Registered User Join Date: May 2016 Location: Imperial Beach, Ca Posts: 18	Re: 72 A/C vacuum line diagram Is there a kit for the vacuum hoses? If so do you know where i can get it? I'm restoring a 1969 c20

09-27-2017, 12:09 PM	#13
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 72 A/C vacuum line diagram I've never seen a kit. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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