FavorCOOL 3.6 CFM 110V 1/4HP Single Stage Rotary Vane Air Vacuum Pump and AC Manifold Gauge Set Kit for R134a R12 R22 R502 R410a HVAC Air Conditioning Refrigeration Recharging

After changing my expansion valve with a new one, I used this 1/4 HP vacuum and AC came back to life. Gauges will help to diagnose what is going on with the AC system. I was quoted 1.5k dollas to fix it and I did it with a fraction of that money...... Learn how to read the gauges and seach for your AC freon capacity at the time of recharging the system other than going by pressures reding. Just add what manufacture recomends. If you go by pressure, it will be subject to ambient temps and IMHO harder to doing it properlly with house tools.. I end up returning AC compressor and ac condenser that I purchased since did not need them anymore. Saved 1.3k dollars😉 Check pics attached, they are for Toyota Tundras but might help to diagnose any brand since the same principals could be the same for all "I GUESS" . Reading the pressure on the high and low side will tell you what might be wrong. Hope this helps others...

This vacuum pump was totally worth it saved me a trip to the ac shop and who knows how much would it been.

Works great, pulls an awesome vacuum. But the pictures show multiple can/tap fittings. It only comes with a puncture fitting and a large bottle fitting. Does not come with a self sealing can tap. You’ll have to buy that separately

I enjoyed using the AC vacuum pump and the manifold gauges. Looking at videos on Google and U-tube and reading material package with the products helped me understand and how to use the products. I replaced all of my components that make up the AC system on my 2002 Ford ranger edge model with 3.0 engine. I saved money on Amazon purchasing the parts and now I can make extra money fixing and servicing Auto AC systems.

First the vacuum pump: I followed the manual's procedures for filling the pump. Initial testing showed it pulled a vacuum of 138 microns - not bad at all. But 2 hours pump run time later only able to reach 200 microns. I will replace the oil with some brand name vacuum pump oil and see if that solves the problem. Could be due to Florida's high humidity. Replaced oil: now 120 microns. Manifold gauge set: Held 350 PSI test for 8 hrs on low side gauge using blue and yellow hoses. High side not yet tested. Low side test with vacuum and micron gauge shows leakage as expected as these are not deep vacuum rated hoses. Given the price, I'm happy with the purchase as long as new oil solves the pump issue. It did.

The gauges seem to be accurate. The pump is strong. I used it to charge the front AC in my RV with the compressor at the rear engine and lines running from back to front. Saved me $200. This kit should last for repeated uses.

No dislike

I really want to like this thing. The vacuum pump hasn’t given me any problems, and it pulls a true vacuum. The problem I have is with the valves, you can tell they’re just cheaply made when you turn them. The big problem I have is with the stopcock on the yellow fill line. The first time I used it I could feel the rubber inside tear when I turned it and now I’m constantly messing with that thing cause it will let some out and then get clogged and I’m constantly turning it back and forth to make it draw refrigerant. I’m going to replace it before I use it next, but it’s just kind of irritating to get a bad valve right out of the box, and to know that the rest of them don’t feel strong either… I’m probably just going to get a few fittings and rebuild everything that I can without damaging the high pressure hoses. Just irritating. Wish the gauges were a little sharper and better resolution (the low side goes up to like 200 psi or something like that… why?) I’m happy with the pump though.