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Forum: Diesel Discussion

07-13-2017, 11:18 PM

Replies: 61

AC Charge Question - High Side and Low side identical?

Views: 3,870

Posted By BillGrissom

May be wrong, but I have always applied vacuum to...

May be wrong, but I have always applied vacuum to just the low side port. Seems unless very cold, the expansion valve would be open. I lock up vacuum for hours, but pump off and valves shut. That...

Forum: Diesel Discussion

06-30-2017, 01:39 PM

Replies: 61

AC Charge Question - High Side and Low side identical?

Views: 3,870

Posted By BillGrissom

I recall Schraeder valves are the same for both...

I recall Schraeder valves are the same for both R-12 and R-134A type ports, in cars at least thru the 1990's, plus interchange w/ those in cars, bikes, and compression gages (but don't do that). I...

Forum: Diesel Discussion

06-30-2017, 01:47 AM

Replies: 61

AC Charge Question - High Side and Low side identical?

Views: 3,870

Posted By BillGrissom

Be careful with those gage sets. At the ports,...

Be careful with those gage sets. At the ports, screw in the valve just enough to open the Schraeder valve, maybe 1 or 2 turns after you see pressure on the gage. If you over-do it (like most...

Forum: Diesel Discussion

06-29-2017, 02:53 PM

Replies: 61

AC Charge Question - High Side and Low side identical?

Views: 3,870

Posted By BillGrissom

Do you have the typical 3-hose "gage set" and...

Do you have the typical 3-hose "gage set" and have you used it before? In my HF one, the valves at the hose ends open (screwed in) to apply pressure to the low (blue) and high (red) gages, resp. ...

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