My homemade pump isn’t as complicated. I sawed the manifold side fitting off a refrigerant can tap, drilled it out and soldered it straight onto the original vacuum line of the pump. I ran both tubes of the pump upwards as not to leak oil and I use the vacuum gauge on the manifold to measure my vacuum.
They loan them out free at Autozone…Just put up deposit and AZ will give you full refund when you return it. They will loan you all the gauges and hoses as well.
Nowdays, these vacuum pumps are fairly cheap and it don’t take a day to build something that may only work a few times. There are lots of inexpensive tools made for A/C service and auctions where you can get this stuff secondhand for a steal. It would be sad if this homemade unit failed to purge the moisture from your system. Its a good idea but I prefer to use tools made for A/C service to be compliant with EPA regulations… No Pun Intended
I tried converting a 10 dollar tire inflation pump by putting a line on the intake port of the little piston inside the pump. Unfortunately, it only pulled down to 25 inches of mercury which is a very weak partial vacuum. I threw the damn thing in the garbage.
hi Rich: love the vids!!! Maybe you can show us a vid of you using (all the steps) the pump to vacuun the a/c system and then how to add the freon properly. Thanks.
Doug
Really exciting report. Content may be prepared throughout really great method. I enjoy examining this sort associated with things. Thank you with regard to discussing excellent know-how.
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@richpin06a Great video…Thanks for sharing!
@clockguy2 If it works that is the only thing that matters.
My homemade pump isn’t as complicated. I sawed the manifold side fitting off a refrigerant can tap, drilled it out and soldered it straight onto the original vacuum line of the pump. I ran both tubes of the pump upwards as not to leak oil and I use the vacuum gauge on the manifold to measure my vacuum.
They loan them out free at Autozone…Just put up deposit and AZ will give you full refund when you return it. They will loan you all the gauges and hoses as well.
Nowdays, these vacuum pumps are fairly cheap and it don’t take a day to build something that may only work a few times. There are lots of inexpensive tools made for A/C service and auctions where you can get this stuff secondhand for a steal. It would be sad if this homemade unit failed to purge the moisture from your system. Its a good idea but I prefer to use tools made for A/C service to be compliant with EPA regulations… No Pun Intended
good vid thanks
I use a similar vacuum pump that I removed from an old AC machine for AC work.
Thoughtful design, thanks Rich.
@happy543210 That’s a funny story
I tried converting a 10 dollar tire inflation pump by putting a line on the intake port of the little piston inside the pump. Unfortunately, it only pulled down to 25 inches of mercury which is a very weak partial vacuum. I threw the damn thing in the garbage.
@questionful I believe my gauge reads 29.5 when i am pulling a vacuum.
how many inches Hg can this thing pull? I might need a vaccum pump for molding silicone and 29″Hg is recommended.
hi Rich: love the vids!!! Maybe you can show us a vid of you using (all the steps) the pump to vacuun the a/c system and then how to add the freon properly. Thanks.
Doug
nice
very informative
Really exciting report. Content may be prepared throughout really great method. I enjoy examining this sort associated with things. Thank you with regard to discussing excellent know-how.
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