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Post by MoJeeper™ on Jul 11, 2011 22:53:14 GMT -5
I was taught to leave it on there. Not that it causes problems if you don't. It just helps get the most moisture out of the system that you can. I usually leave it on there for an hour, it won't hurt anything if you leave it on longer either. Then a lot of the times, I'll take the gauges off and leave it over night. Then I'll plug them back in the next morning and see what kind of vacuum I have.
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Post by jd9600guru on Jul 11, 2011 22:53:32 GMT -5
I'm not sure how long you DID vac it.......... but I've got by with an hour on a rush job but if it's in the shop I'll pull for 2, see if it leaks for an hour then pull 2 more. Never had a moisture in system or contamination problem yet.
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Post by Dave-ECIA on Jul 11, 2011 23:15:27 GMT -5
I didn't leave it on anywhere near that long. I let it pull for a max of 10 minutes, let it set for about 3 hrs to check for leaks, then let it pull again for probably 5 minutes just to make sure everything was fine.
Hmm, now you two have me thinking I should hook up the vac again tomorrow to get any residual moisture out that I may not have gotten with the short time I had it hooked up.
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Post by MoJeeper™ on Jul 11, 2011 23:31:12 GMT -5
I'd probably just leave it be Dave, as long as it's working.
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Post by acfarmer on Jul 12, 2011 6:53:45 GMT -5
Yeah ten minutes isnt long enough. A hour at minium but then again Ive not even but the vaccuum on a tractor and got by but the air probably would be colder if I would have.
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