Search found 1170 matches

by bohica2xo
Mon Oct 16, 2023 2:30 pm
Forum: Automotive Air Conditioning Forum
Topic: How much vacuum
Replies: 15
Views: 12511

Re: How much vacuum

Tim: MVAC was always the red headed step child of HVAC. I learned HVAC from the RSES courses for the refrigeration techs who worked at the big plants. I took those classes in self defense after paying a shop a lot of money to do a poor job on a car I owned. The first micron gauge I used in class was...
by bohica2xo
Sun Oct 15, 2023 12:08 pm
Forum: Automotive Air Conditioning Forum
Topic: How much vacuum
Replies: 15
Views: 12511

Re: How much vacuum

That is a solid pump Tim sells. A good value. Pump CFM only matters if you are running flat rate labor on 3 bays worth of cars all at once. I have been telling people for decades on the generations of this forum to buy and use a Micron gauge. It is worth having, both to check the system for leaks, a...
by bohica2xo
Sat Oct 14, 2023 9:31 pm
Forum: Automotive Air Conditioning Forum
Topic: How to figure out oil amount for custom system?
Replies: 14
Views: 12555

Re: How to figure out oil amount for custom system?

First, and foremost the FS10 is NOT A SANDEN. FS10 compressors like some oil in circulation. Second, Oil Circulation Rates have many changes from system to system. For instance, years ago when Harrison A6 compressors were OEM, Harrison told us an OCR of 10 to 12% was a good number, in a system where...
by bohica2xo
Fri Oct 13, 2023 6:45 pm
Forum: Automotive Air Conditioning Forum
Topic: Robinaire 2.2 cu in vac pump - repairable?
Replies: 5
Views: 4953

Re: Robinaire 2.2 cu in vac pump - repairable?

3.102 Oil Contamination The most common cause of a loss in efficiency in a mechanical pump is contamination of oil. It is caused by condensation of vapors and by foreign particles. The undesirable condensate emulsifies with the oil which is recirculated and subject to re-evaporation during the norma...
by bohica2xo
Fri Oct 13, 2023 6:41 pm
Forum: Automotive Air Conditioning Forum
Topic: Drain oil out of new compressor?
Replies: 8
Views: 4831

Re: Drain oil out of new compressor?

Regarding The oil changes on vacuum pumps, A lot depends on what you are sucking up with your pump. But moisture eventually fouls the oil. Small, direct drive pumps don't hold much oil. So it gets contaminated fast, but it is not bad to change. For reference I believe Cusser is using a lab pump like...
by bohica2xo
Fri Oct 13, 2023 3:27 pm
Forum: Automotive Air Conditioning Forum
Topic: Wrong Size AC hose
Replies: 5
Views: 3110

Re: Wrong Size AC hose

The three line sizes in the average system reflect the density and velocity of the refrigerant. The Suction line to the compressor is generally carrying cool gas. Usually a -10 line. Some systems use a -12 suction line. I have seen -8 suction lines on some small imports. The discharge line runs high...
by bohica2xo
Thu Oct 12, 2023 3:07 pm
Forum: Automotive Air Conditioning Forum
Topic: Drain oil out of new compressor?
Replies: 8
Views: 4831

Re: Drain oil out of new compressor?

Draining, measuring and inspecting the drained shipping oil on a new compressor is absolutely needed.

I also suggest adding an ounce or two of the oil you intend to use in the new unit, and flushing it through the new compressor to make sure it has cleared the unknown oil
 
by bohica2xo
Thu Oct 12, 2023 1:33 pm
Forum: Automotive Air Conditioning Forum
Topic: How to figure out oil amount for custom system?
Replies: 14
Views: 12555

Re: How to figure out oil amount for custom system?

Given the very large evaporator you are using, the line lengths and large receiver in your system, I would treat it the same as an Expedition or Excursion using the same FS10 compressor with Rear A/C. Expedition: 1997 All Eng.; w/ Rear AC – 13.00 Oz. PAG-46; 62.00 Oz. R-134a Excursion: All Eng.; w/ ...
by bohica2xo
Tue Oct 10, 2023 6:02 am
Forum: Automotive Air Conditioning Forum
Topic: AC HOSES
Replies: 20
Views: 12717

Re: AC HOSES

That would depend on your expansion valve. My parts list for that Jaguar shows a brass, right angle externally equalized expansion valve. Later models had the H type aluminum expansion valve with both the liquid and suction line connections. Which valve does your car have? We don't rely on OEM hoses...
by bohica2xo
Sat Oct 07, 2023 3:53 pm
Forum: Automotive Air Conditioning Forum
Topic: AC HOSES
Replies: 20
Views: 12717

Re: AC HOSES

Your compressor will be fine. Looks like both cars used some variant of the H_6 series. HD6, HT6 etc. The Caprice condenser would be much easier to make hoses for. It uses standard male O ring fittings that are available everywhere. The one thing about the mid 1990's big GM condensers is they used t...