Search found 41 matches

by philipswanson
Mon Jun 15, 2020 7:53 am
Forum: Automotive Air Conditioning Forum
Topic: Vacuum Pump Oil
Replies: 8
Views: 457

Re: Vacuum Pump Oil

Money is not the big issue. Don't like to waste it though. It's more curiosity. Or is it just an oil ripoff. I have a vane type vacuum pump and have it apart. It's nothing but a rotor spinning around a housing insert. Can't understand why any special oil would be required. Vapors are released thru a...
by philipswanson
Sat Jun 13, 2020 9:06 am
Forum: Automotive Air Conditioning Forum
Topic: Vacuum Pump Oil
Replies: 8
Views: 457

Re: Vacuum Pump Oil

So is compressor oil basically the same as vacuum pump oil?
by philipswanson
Fri Jun 12, 2020 4:05 pm
Forum: Automotive Air Conditioning Forum
Topic: Vacuum Pump Oil
Replies: 8
Views: 457

Vacuum Pump Oil

What kind of oil do you use in your vacuum pump? Is motor oil ok? Or maybe mineral oil? Can't see wasting big bucks on "Special" pump oil. What kind of base oil is this so-called pump oil?
by philipswanson
Fri Jun 05, 2020 7:58 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressure Switch
Replies: 0
Views: 263

Pressure Switch

Who has the best selection of pressure switches? I am looking for a LP pressure switch with 7/16 X 20 female thread that opens at 15-20 and closes at 30 psi for my fans. Thanks!!!
by philipswanson
Fri May 22, 2020 3:16 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 1861

Re: Motorhome R134 Problems

It does cycle on pressure switches as well as the thermostat. That's what they do. Funny how a tech rep sees it right away. Sorry I didn't answer exactly correct. That happens, I am not a professional but that's what it took to solve the problem.
by philipswanson
Thu May 21, 2020 2:07 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 1861

Re: Motorhome R134 Problems

I called Jeff over at Transair who is their Tech Rep. He knew the problem and solution right away. The thermostat. He had me jump it and sure enough, the compressor came to life and cycles just as it should. Cold air too all of a sudden. I appreciate the help but it pays to call a Tech Rep who knows...
by philipswanson
Tue May 19, 2020 5:57 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 1861

Re: Motorhome R134 Problems

RPM is 2160 as I mentioned before. Ambient is 60-70 degrees. The high pressure shots up periodically to 200+ but only as the compressor cycles. The clutch only stays engaged for 10-15 seconds, then the high side drops back to 100. What test data are you missing? I am going to shut down the condensor...
by philipswanson
Tue May 19, 2020 2:32 pm
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 1861

Re: Motorhome R134 Problems

Static pressures are: 85 on the low side and 100 on the high side. Ambient is 70 degrees. Does that tell me anything?
by philipswanson
Tue May 19, 2020 9:16 am
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 1861

Re: Motorhome R134 Problems

Yes, all pressures are with the compressor running. Service ports are easy to get to because I moved them to the rear, upper area. It's a diesel pusher motorhome. OK what should the static pressures read? I'll check them out. How can I tell if the system is overcharged?
by philipswanson
Mon May 18, 2020 11:20 am
Forum: Automotive Air Conditioning Forum
Topic: Motorhome R134 Problems
Replies: 16
Views: 1861

Re: Motorhome R134 Problems

I put another 20 oz of Freon in and got the compressor to cycle a couple of times for sort duration. When the compressor ran, the high pressure side went up to 280-300 but as soon as it cut out, the pressure went back down to 110-125 and pretty much stayed there. No cooling at the outlets, just ambi...

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