bearing01
06-25-2007, 12:32 PM
I got this Harborfreight gauge set:
http://www.harborfreight.com/manuals/92000-92999/92649.pdf
for R134a setup.
The instructions say to OPEN the acme quick-disconnect valves (valves #22 #23 in following pic) you turn their knob COUNTER CLOCKWISE. To CLOSE you go CLOCKWISE. This is stated in the "operation" section on page 5 steps 6 & 8 of the instructions how to conduct a static pressure test.
http://i115.photobucket.com/albums/n300/bearing01/Gauges.gif
My Problem,
before hooking up the gauges with R134a canister on the auxilary (yellow) center hose I figured I would purge the air from the lines. I do this by opening the valve on the can of R134a and opening the manifold valve (#11) and either acme valve (#22 or 23) until some refrigerant comes out. In my case, with the #23 valves screwed fully counter clockwise the hoses wouldn't purge. No air would come out.
It appears the instructions for this #22 & 23 acme quick disconnect valve is backward. After taking apart the #22 & 23 valves, when the knob is fully clockwise the internal pintle is fully forward and this is when air will pass through the valve. this is OPEN. When the knobs are fully counter-clockwise the valve is closed and no air will pass. The problem was that when the knobs were fully clockwise the valve still wouldn't pass air. I had to put a washer in the valve to ensure the valve would open when fully clockwise.
My question is ... is this correct? Or is this just some cheap asian crap? I question it because when I had the valve picked apart I put that extra washer in there to ensure the valve was fully open (pintle fully forward) with knob fully clockwise. My problem with it is this: On the high side, with knob fully clockwise and pintle all the way forward to OPEN the system high side pressure seems to be pushing the pintle backward to close. This I believe is giving me a low reading on the high side.
Any insite or opinion on this would be appreciated. Anyone have experience with this gauge set or one similar?
http://www.harborfreight.com/manuals/92000-92999/92649.pdf
for R134a setup.
The instructions say to OPEN the acme quick-disconnect valves (valves #22 #23 in following pic) you turn their knob COUNTER CLOCKWISE. To CLOSE you go CLOCKWISE. This is stated in the "operation" section on page 5 steps 6 & 8 of the instructions how to conduct a static pressure test.
http://i115.photobucket.com/albums/n300/bearing01/Gauges.gif
My Problem,
before hooking up the gauges with R134a canister on the auxilary (yellow) center hose I figured I would purge the air from the lines. I do this by opening the valve on the can of R134a and opening the manifold valve (#11) and either acme valve (#22 or 23) until some refrigerant comes out. In my case, with the #23 valves screwed fully counter clockwise the hoses wouldn't purge. No air would come out.
It appears the instructions for this #22 & 23 acme quick disconnect valve is backward. After taking apart the #22 & 23 valves, when the knob is fully clockwise the internal pintle is fully forward and this is when air will pass through the valve. this is OPEN. When the knobs are fully counter-clockwise the valve is closed and no air will pass. The problem was that when the knobs were fully clockwise the valve still wouldn't pass air. I had to put a washer in the valve to ensure the valve would open when fully clockwise.
My question is ... is this correct? Or is this just some cheap asian crap? I question it because when I had the valve picked apart I put that extra washer in there to ensure the valve was fully open (pintle fully forward) with knob fully clockwise. My problem with it is this: On the high side, with knob fully clockwise and pintle all the way forward to OPEN the system high side pressure seems to be pushing the pintle backward to close. This I believe is giving me a low reading on the high side.
Any insite or opinion on this would be appreciated. Anyone have experience with this gauge set or one similar?