Search found 665 matches

by bohica2xo
Thu Jan 30, 2020 9:10 am
Forum: Automotive Air Conditioning Forum
Topic: DIY Vacuum Pump Showing Moisture Removal.
Replies: 7
Views: 478

Re: DIY Vacuum Pump Showing Moisture Removal.

Found it. I lost the original photo with a drive failure years ago. Damn, over 15 years ago I posted that.

https://www.autoacforum.com/messageview.cfm?catid=20&threadid=12050

Last photo

It actually squeaked down to 800 a couple of times in other tests with a little more oil.
by bohica2xo
Wed Jan 29, 2020 8:45 pm
Forum: Automotive Air Conditioning Forum
Topic: DIY Vacuum Pump Showing Moisture Removal.
Replies: 7
Views: 478

Re: DIY Vacuum Pump Showing Moisture Removal.

Somewhere on the old site I posted a picture of an FS6 that would pump down to 800 microns on the suction side - with the discharge open to atmosphere. I was only turning that FS6 about 250 rpm too. I would trust the York if it was in good shape. But a tired hermetic from a discarded refrigerator is...
by bohica2xo
Wed Jan 29, 2020 10:20 am
Forum: Automotive Air Conditioning Forum
Topic: DIY Vacuum Pump Showing Moisture Removal.
Replies: 7
Views: 478

Re: DIY Vacuum Pump Showing Moisture Removal.

Fast Forward to the 11 minute mark to see the water boil off.

sure shows the shortcoming of scrap refrigerator parts as vacuum pumps too!

.
by bohica2xo
Sun Jan 26, 2020 10:28 am
Forum: Automotive Air Conditioning Forum
Topic: Leaking aeroquip fittings??
Replies: 2
Views: 380

Re: Leaking aeroquip fittings??

Contact Aeroquip and find out what the annual permissible leak rate is for that fitting. Everything leaks a little. You are losing a pound in 3 years across 8 fittings and several feet of hose. Commercial stationary comfort refrigeration is allowed to leak 10% of the total charge per year by the EPA...
by bohica2xo
Sun Dec 22, 2019 3:25 pm
Forum: Automotive Air Conditioning Forum
Topic: Finding A Leak In A New System
Replies: 10
Views: 1642

Re: Finding A Leak In A New System

An ounce or two of refrigerant should give you plenty of pressure for a leak test. No need to fully charge the system.

Manifold valve leaks and service hose / connection leaks happen occasionally. More common on rental / loaner units...
by bohica2xo
Mon Nov 04, 2019 3:26 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressure Switches Binary or Not
Replies: 14
Views: 3891

Re: Pressure Switches Binary or Not

You can place the LPCO in series with the HPCO when installed in the High side of the loop.

This will inhibit compressor operation below about 25f ambient, and when the system is completely empty - static pressure below 30 psi.

A little protection from the worst events.
by bohica2xo
Mon Oct 21, 2019 7:41 am
Forum: Automotive Air Conditioning Forum
Topic: AC Compressor not kicking on when trying to recharge system
Replies: 16
Views: 5487

Re: AC Compressor not kicking on when trying to recharge system

Side can tap is the only way to go. Always works, any size can.

Year / Make / Model of your car would help us with a diagnosis.
by bohica2xo
Sun Oct 20, 2019 5:00 pm
Forum: Automotive Air Conditioning Forum
Topic: AC Compressor not kicking on when trying to recharge system
Replies: 16
Views: 5487

Re: AC Compressor not kicking on when trying to recharge system

Low side service connector not depressing the Schrader valve. You have charged the service hose.

Try depressing the coupler a little bit to see if your low side gauge drops.
by bohica2xo
Sun Oct 20, 2019 10:13 am
Forum: Automotive Air Conditioning Forum
Topic: Restriction?
Replies: 11
Views: 3270

Re: Restriction?

A blockage at the TXV would result in a reduced low side pressure as the refrigerant stacked up in the receiver dryer. If the TXV was restricted you should see calm liquid in the sight glass. The receiver is designed to deliver liquid to the TXV. If the flow is reversed it does a lousy job of that. ...
by bohica2xo
Thu Oct 17, 2019 4:11 pm
Forum: Automotive Air Conditioning Forum
Topic: Restriction?
Replies: 11
Views: 3270

Re: Restriction?

Receiver / Dryer installed with flow in the right direction?

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