Mondial T A/C recharge port

Funny you ask i just spent hours working on my 89 Mondial t cab ac today. The low side is the on the larger hose coming out of the compressor heading forward. The high side is near the top of the compressor. Has your system, been changed over to 134a? If so the one with the blue safety cap is the lower and the red one is the high side. The original r-12 fitting is brass colored and will not fit the 134a hoses. You must have a 134a adapter. Mine was already switched over and the r-12 fitting has a small silver adapter screwed on to it that does not have exposed threads. The 134a fittings are a snap on type.

I just dumped two cans of 134a into my system. I have a small leak and it only lasts for a few months. The stuff I used has leak stop in it so we will see what happens. I'll probably get it permanently fixed this fall/winter. I have a slow leak in the line near the rear of the car and it can be fixed without replacing the entire line. My shop said it would be about $500, but I wanted to try the cheap fix first. The AC never really blows "real" cold even when working properly.

Just as a note, check all of the relays and switches to be sure your switchee are working and the compressor is kicking in. Also if you check the pressure and its too low, the compressor will not come on (it is a safety thing..it will come on after about a half a can is dumped in). Also if the system is overcharged it will not kick on. The condenser fan is located behind the front grill in front of the left front tire. When the compressor is kicking in you can see it and the clutch spinning (from under the car) and the condenser fan should kick on as well (you'll have to walk around to look at it.) Its tight working under the t if you dont have a lift. I'm old school and I have just a jack and jack stands.

Best of luck if you have any questions just holler. I will have mine up again tomorrrow if you need a pix. I'm pounding out the aluminium undercarriage pans that I smushed when i bottomed out on a club run. Better the alum pans than the stuff it protects.

Dave

 

Pix of the low side 134a AC recharge fitting for Mondial T. Its behind and just fore of the passenger rear tire.

Aaahhh. The AC was blowin so cold I had to take her out for ice cream to reward myself.
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I know this is an old post but I was wondering the outcome. The OP asked a question and you took the time to answer with pics and then he never came back, rude.

Did you solve your A/C issue? I'm gathering all I can because I would like to figure mine out before summer

 

The OP is still trawling the forum, last activity 1st November 2011

Looks like he just decided that a reply was not necessary.

 

Ted,

Were you asking me the outcome or Garrett?

I haven't been on in a bit due to life being busy and just got around to paying my subscription again. My Mondi is doing fine. The sealant did not completely seal the leak in the line, so the 134 leaks out over time. My fix will be to repair the ac hose. Good luck with yours and I hope your issue is an easy fix as well.

Dave

 

Hi All,
I was convinced we had a leak in our 1992 Mondial t's a/c and that it had quit due to low gas. However, when I finally put some gages on it, I noticed the compressor is actually running. The readings with an OAT of 90F are 47/230 at idle. The inside air vent is not even the slightest bit cool. Google searches indicate a compressor with a high low and a low high. I am also wondering if it could be the expansion valve. Does anyone have any advise on further troubleshooting?? The a/c was ice cold until it quit about a year and a half ago.

Thanks,
Dave
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Hi Dave, is the blue line the low side R12 recharge fitting for Mondial T? The red must be the hi. What does the readings of 47/230 at idle mean, is that normal range? I would figure if its not blowing cold, you just need to add coolant (R12) in there and see if it gets cooler.

But I'm learning all of this AC stuff myself as I will need to start looking at my car as well.

 

Dave

47 on the low side indicates you are low on gas. You should be around a steady 35 give or take.

High side looks close.

I would add 1 can and see what happens. Your low side should come down some and high side shouldn't move much.

Regards,
Jerry

 

Interesting, I thought adding freon would raise the low side rather than lower it. Must be some complicated Boyle's law or something I can't understand.

thanks,
Dave

Mike, you are correct...you can also see the compressor is labled S and D (suction and discharge.) With the air off, both gages read the same (around 60.) The optimum range with the air on depends on ambient temperature. Our t manual doesn't include a pressure chart but here is one for the 348 at 2000rpm (not very detailed). One Bar is 14.5psi. .
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This diagram was helpful in seeing the Big Picture.

Also, this thread helped me understand the Ferrari (A/C System):
http://ferrari.cdyn.com/carl_rose_docs/Ferrari%20328%20AC%20Recharge.pdf
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Good stuff Mike. Doing some research it looks like 60psi static is a little low which confirms the suspicion that I am low on refrigerant. 100+ before start seems to be more common. I think I need to get the RPM up to 2000 and see what I get on the low side and then as Jerry said add a can. The A/C was refurbished by Shelton Ferrari five years age so I hate to think something major has gone wrong.

Dave

 

Here's a great video on recharging R12.
Dave, I may tap you on your R12 recharging gauge system if I don't use my 134a conversion kit.

[ame]http://www.youtube.com/watch?v=g6d3oNRbIyQ[/ame]

 

No Problem, It also came with 134a adapters so either way you're welcome to use it.

Dave