on my 99- 3Lt.caravan i have replaced the airconditioner compressor belt 3 times now within a few days.Before it rippes apart,the clutch will squeel awhile,sometimes runs right,even pumps out cool air,but eventually rippes appart.With a fresh start the compressor comes on,but no fan starts up.I have a gage set und an old 120 volt freezer compressor to evacuate if nessesary,but am not to sure of what to do or to look for.The compressor does not seem to be ceased,just hard pumping.many years ago i worked on farmmachinery-airconditioner,and i am very rusty.would sombody have some advise,money is very tide. thanks skipperone

RickMN

These are classic overcharge symptoms. Do you have a scale? Then you could evacuate and recharge just the right amount.

skipperone

Thank you very much...couldn't find my way around here for a while to return my thanks.
Talk with someone in the meantime who advised me to hook up a gauge set and check the high pressure which ran close to 250 with a low around 30-35. After pumping out and releasing the pressure around 170, the squealing stopped and system is working fine. The reason for this high pressure could have been me adding a can of stop seal material to it of the I believe 12A which has a greater expansion factor just bringing the pressure too high. So I learned alot, hope this can help someone else also. BTW, the R12A is also more effiencent in cooling than other gases used prior I am told.
Thanks again

TxGreaseMonkey

This link may help you with air conditioning issues:

http://www.askmehelpdesk.com/cars-tr...ml#post1864159

1999 Dodge Caravan:

. Low side gauge (evaporator suction): 10 to 37 psi.*

. High side gauge (discharge): 112 to 210 psi.*

. Refrigerant oil capacity (without rear A/C): 5.00 oz.

. Refrigerant oil capacity (with rear A/C): 7.40 oz.

. Refrigerant capacity (without rear A/C): 2.13 lbs. of R-134a

. Refrigerant capacity (with rear A/C): 2.88 lbs. of R-134a

*Sea level and ambient air temperature of 80 degrees F.