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  #31  
Old July 19th, 2020, 16:02
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Saudade Saudade is offline
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Re: Meh a/c

No worries. Just make sure the valves on the manifold gauge are closed before you open the service valves.
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  #32  
Old July 19th, 2020, 16:39
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Re: Meh a/c

Quote:
Originally Posted by Saudade View Post
No worries. Just make sure the valves on the manifold gauge are closed before you open the service valves.
yeah 100%.
I've done other a/c systems on car's before this had me sooo stumped... now that I understand it its a way cool thing to have.
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  #33  
Old July 19th, 2020, 17:42
Agreen Agreen is offline
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Re: Meh a/c

Wow I've honestly never come across that style before. 15 years of being a professional auto tech and that's a first. It's awesome to learn something new!
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  #34  
Old July 19th, 2020, 18:13
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Re: Meh a/c

That's why we're here.

Had my XJ for 20 years and still learn something new every now and then.
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  #35  
Old July 26th, 2020, 07:46
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Re: Meh a/c

Okay. some updates.

#1. the low side port was completely seized and I have to really mess with it to get it moving. That is now resolved.

However this raises some questions.... such as. if the low side port was seized. the a/c guy 100% filled from the high side.

T.T

After messing with it today. still cant get this thing to fill...

Pulled vaccum. -30hg did not change in 60mins.

Both Gauges show pressure when car started.

R12 Valves set halfway.

Bypassed relay. clutch engaged.

Tried to fill a Can. (low side)
Can got cold. Did not fill.

Am I like missing something?
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  #36  
Old July 26th, 2020, 07:47
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Re: Meh a/c

when I say "can got cold didn't fill"
Can we running for 20mins on the first can.
it still weighs almost the same as the new can.

I feel like I'm going crazy here...
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  #37  
Old July 26th, 2020, 08:30
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Re: Meh a/c

I did some more messing with it.
I cant seem to get high side to show pressure. with the valve set to halfway.
so this leads me to believe compressor might have tanked.
Will update with more info.
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  #38  
Old July 26th, 2020, 09:25
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Re: Meh a/c

What pressure did they show? With the system evacuated, there should be no pressure since there's nothing to pump.
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  #39  
Old July 26th, 2020, 09:30
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Re: Meh a/c

0 high side pressure.
30 low side
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  #40  
Old July 26th, 2020, 09:34
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Re: Meh a/c

Quote:
Originally Posted by blu3fan View Post
0 high side pressure.
30 low side
What gauges are you using? Can you post a pic?

Zero on the high side is atmospheric pressure. At rest (ac off), both high side and low side should read the same.
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  #41  
Old July 26th, 2020, 09:35
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Re: Meh a/c

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I bought these
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  #42  
Old July 26th, 2020, 09:36
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Re: Meh a/c

With Gauges hooked up after removing the can of r134a. Im now showing 0 on both sides with gauges hooked up sealed. no can attached.
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  #43  
Old July 26th, 2020, 10:12
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Re: Meh a/c

Im gonna do some messing with the r12 valve. I have it 100% centered. but maybe I'm still not getting into it.
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  #44  
Old July 26th, 2020, 13:01
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Re: Meh a/c

Sounds like you have no refrigerant left.

I checked on a spare valve I pulled from a junk yard a while back. Both take about 9 1/2 turns to go from "Back seated" (normal use) to "front seated" (isolate compressor). So when you "open the valve" for servicing, turn the stems about 4 turns.

Back Seated



Front Seated



Mid (servicing)

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Last edited by Saudade; July 26th, 2020 at 13:05.
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  #45  
Old July 26th, 2020, 13:51
Agreen Agreen is offline
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Re: Meh a/c

A bad compressor is possible at this point. There's a reason the low pressure switch is there. You may have bypassed it so much that it caused compressor damage.

Take a trip to the JY and grab some AC lines. Or maybe a place that makes hydraulic hoses can make you some new ones pretty cheap. Either way, I'd be ditching those valves.
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