72 A/C vacuum line diagram

[ezstriper]

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]

Here ya go

[ezstriper]

thanks !!!!

[KEL]

my pleasure

[SS Tim]

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]

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]

Sorry
Didn't even notice you were new
Welcome !

[ezstriper]

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]

Here they are...

[tommys72]

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]

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]

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]

I've never seen a kit.