A/C vacuum pump

[2stix]

well after dealing with a failed A/C system on our GMC dually, i decided to purchase my own vacuum pump. i decided on the mastercool mas-90065. local A/C service shop wanted to replace my entire system for over $1200. ya right. i bought a new compressor, accumulator, and orifice tube, and all the oil, flush fluid, and refrigerant. flushing the system and reinstalling it all now. i will have to wait till next week for the vacuum pump to arrive. i will let you all know how well it works then. the digital manifold/gauge has a micron reading and leak test after the vacuum process is complete. that will tell me how well the pump worked. if i find it in my budget (need to sell some stuff) i will invest in a good micron gauge that will tell me what the pump is pulling throughout the process.

all this because of a bad o-ring on the low side pressure switch which cause the refrigerant and oil to leak out. compressor decided to lock up with no oil in it. imagine that.

 

[CharlesS]

Twenty five years ago I purchased a used portable compressor and reverse the ports. For $35 plus a $20 rebuild kit; it was money well spent....
Looks as though you purchased a quality vacuum pump....

After the repairs if the system can be pulled down to 500 microns or below and hold; you are good....