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pretty slick, too high for me

LOL, I learned the hard way too that you have to have a special space for your vacuum pump. I only did it once, but it made one heck of a mess back there.

I USED to.

Since then, I built a shelf for rec machine, vac pump and other tools.

Haven't spilled pump oil that way in years.


Dang!! Now I went and cursed myself.

Originally Posted by jpsmith1cm

Nope. Never done that either...

You must store the pump in the side door well. Then you dump the pump.

Originally Posted by I_bend_metal

And I have also never drained the oil in mine by going around a corner too fast.....

Nope. Never done that either...

Originally Posted by jpsmith1cm

Nope. Never done that.

And I have also never drained the oil in mine by going around a corner too fast.....

Originally Posted by odean76

Do you mean that some of you have accidentally put pressure to a vacuum pump? That's crazy talk.

Nope. Never done that.

Originally Posted by Dchappa21

Haven't used one but seen one and really like the oil cartrige looks real easy to change the oil.

Also if u put pressure to it, it won't blow the oil all over the place.

Do you mean that some of you have accidentally put pressure to a vacuum pump? That's crazy talk.

Originally Posted by Burnerfixer

What Ice is basically saying, time has nothing to do with quality.
Also that is a lot of money to spend when other vacuum pumps perform just as well.

That was my point exactly! No way in hell I'm spending 800 bucks on a pump. My 7 cfm JB works just great.

What Ice is basically saying, time has nothing to do with quality.
Also that is a lot of money to spend when other vacuum pumps perform just as well.

Originally Posted by addamsmasher

ok ice....I guess the question that is still lingering with me is WHY his test isn't worth a crap. I mean as I stated before his test was far from scientific but seems to me that it gives a GENERAL idea of performance, the test conditions were virtually identical, the only variable it seems was the pump itself. Where am I missing it?

Most commerical systems have king valves, yes I've learned that, I'm sure you remember my thread about the 404-a larkin freezer.

No his test is not crap, just a little loose. The point I am trying to make is this : Does the pump do the job required or not. Hell I worked back in the '60s using a "Frigidaire Rotary Compressor" for a vacuum pump. Was this proper ? at the time I was still wet behind the ears, but when jobs started to go south I decide to educate myself to the best of my ability and with the "gurus" of this business and when I told my boss about what I learned, he listened and realized I was not a dumb a** kid.

ok ice....I guess the question that is still lingering with me is WHY his test isn't worth a crap. I mean as I stated before his test was far from scientific but seems to me that it gives a GENERAL idea of performance, the test conditions were virtually identical, the only variable it seems was the pump itself. Where am I missing it?

Most commerical systems have king valves, yes I've learned that, I'm sure you remember my thread about the 404-a larkin freezer.

Originally Posted by addamsmasher

thanks for the info....always appreciate the cornucopia of knowledge you offer. I take it you guys didn't watch the video. he was pulling from a recovery tank equalized with ATM. He picked an arbutrary level of 200 microns. Obviously his test was far from laboratory but I think it gave a general idea of the performance characteristics of each vacuum pump.... btw, I get paid by the hour I don't watch the clock

Sorry "Grasshopper", I did watch the video and to me the time thing does not prove a thing.
Pulling a good vacuum on a system and sweeping with nitrogen is the proper way of doing this.
As far as 1/2" lines go, Bill Schaffer from Lennox made an excellent video showing the benifits of a larger vacuum line and the cores removed.
Addamsmasher FYI very few Commercial Refrigeration Systems also do not have valve cores.

I use a 3/8" hose on a brute manifold for pulling vacuum, but I also use all 3 1/4" hoses.

My pump used to have a 1/2" port of it that I swapped out with 3/8 for that purpose.

I don't really know that it makes a huge difference.

Originally Posted by jpsmith1cm

What point of 1/2" fittings anyway? I haven't seen any equipment, new or old, with anything larger that 3/8" fittings on charge and purge type valves, and those are on BIG stuff.

If you could pull through 1/2" fittings, then it would make a bit more sense to me. 3/8" at least, but 1/2" to 1/4" is a BIG reduction.

That I tend to agree with, but the sales rep said using the 1/2" holes with the cores removed from the 1/4" fittings does work. I will soon see because our local distributor is allowing me to use one of the pumps and the setup for 90 days. I made my own 3/8" fittings to use with my 6 cfm pump years ago and it did indeed make a difference even though I still had to connect to the smaller fittings on the equipment.

What point of 1/2" fittings anyway? I haven't seen any equipment, new or old, with anything larger that 3/8" fittings on charge and purge type valves, and those are on BIG stuff.

If you could pull through 1/2" fittings, then it would make a bit more sense to me. 3/8" at least, but 1/2" to 1/4" is a BIG reduction.

thanks for the info....always appreciate the cornucopia of knowledge you offer. I take it you guys didn't watch the video. he was pulling from a recovery tank equalized with ATM. He picked an arbutrary level of 200 microns. Obviously his test was far from laboratory but I think it gave a general idea of the performance characteristics of each vacuum pump.... btw, I get paid by the hour I don't watch the clock

Now now, just edemucating the young'n

Originally Posted by addamsmasher

Well if you watch the video I'd disagree with you in this case, it was for all intents and purposes the same setup. 6 minutes is a considerable amount of time when the only variable is the pump, this of course is my opinion and I'll be awaiting redicule because of it. Last time I checked, a recovery tank doesn't have cores anyway.

Now you did it you got my cousin on a roll.

And another : http://www.mitsubishielectric.ca/hva...stallation.pdf