| Problem with dash air conditioning refurbishement [message #284698] |
Wed, 12 August 2015 13:43  |
rjw
Messages: 697
Registered: September 2005
Karma:
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Senior Member |
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Kind of a long story.
Last year, I noticed that my dash air was no longer cooling. In the past I merely topped it of with HC-12a from the 30 lb cylinder I bought a few years ago. This time it would not take a charge and I noticed that the both high and low pressures were the same. I assumed a bad compressor.
I decided that I should go with a new Sanden A-6 for numerous reasons. I ordered the compressor and receiver dryer from Applied and bought an expansion valve locally.
Well I never got around to installing the parts until this year. Reason being I ran out of time last year getting ready to go to the Chippewa Falls rally. Then the ground froze and the water outside turned to ice causing me to postpone the project.
Last week I finally got around to it. I did the following:
1) removed the old compressor, receiver dryer and expansion valve.
2) per Applied's recommendation, I drained the oil from the new compressor and refilled with 8 oz of Polyol Ester oil (retrofit oil). Which is supposed to be compatible with all types of oil.
3) flushed out all lines, condenser and evaporator with the A/C flush kit I bought.
4) installed the compressor, new receiver dryer, expansion valve and old hoses with new O rings.
5) ran my vacuum pump on the system for 3 hours and checked for leaks overnight.
6) connected the 30# HC-12a bottle to the gauge set.
7) started up the engine
 shorted the pressure switch connector to start the pump and heard it running
9) got it up to 30PSI low
RESULT
Instead of the comforting blast of cool air I got nothing. Noticed that both high and low sides had the same pressure reading.
Added more HC-12a and still nothing and both sides have same pressure. Was the new pump bad out of the box?
Also, noticed that when I loosened up the low side connector to let some HC-12a out, I got foamy oil. That never happened before. Got more oil when I disconnected the bottle and gauge set.
What did I do wrong? Add too much oil?
I am annoyed that I will more than likely have to buy another compressor (out of warranty?) and another receiver dryer.
These things are not that complicated.
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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