how does the vacuum advance stop work verses the centrifugal advance
753566
A vacuum advance causes the timing to advance when there is a load on the engine is that what yu wanted
686783
The downspout attachment is properly ventilated to prevent a vacuum. Also there is always air in the system because it is impossible to fill the hose with any pressure.
1859893
I assume you are using it as the full vacuum assembly. If you look carefully at the upper switch on the upper handle you will notice it pushes 'down' and 'up'. A downward push on the button will turn the vacuum on high and a second push will turn it on low speed. To turn the vacuum 'off' you have to push upward on the button, not downward.
1976937
I have not noticed any difference, I don't know technically if it does. I have not found any where that has allowed air to pass being that it had pulled away . I was just running new water and sewage lines in the basement and was inspecting for air leaks of places that I missed on the original install. I found none. You might want to contact the manufacture for technical data. They were very helpful and addressed all questions. I used the closed cell exclusively . Full fill . I can tell I am BLOWN AWAY with the low cost of my heating this year so far. I have used only 1/4 tank of oil. I keep that house at 70 degrees. I live in western pa. Hope this helps I have not noticed any difference, I don't know technically if it does. I have not found any where that has allowed air to pass being that it had pulled away . I was just running new water and sewage lines in the basement and was inspecting for air leaks of places that I missed on the original install. I found none. You might want to contact the manufacture for technical data. They were very helpful and addressed all questions. I used the closed cell exclusively . Full fill . I can tell I am BLOWN AWAY with the low cost of my heating this year so far. I have used only 1/4 tank of oil. I... » Read More I have not noticed any difference, I don't know technically if it does. I have not found any where that has allowed air to pass being that it had pulled away . I was just running new water and sewage lines in the basement and was inspecting for air leaks of places that I missed on the original install. I found none. You might want to contact the manufacture for technical data. They were very helpful and addressed all questions. I used the closed cell exclusively . Full fill . I can tell I am BLOWN AWAY with the low cost of my heating this year so far. I have used only 1/4 tank of oil. I keep that house at 70 degrees. I live in western pa. Hope this helps « Show Less
370060
When it was working it pulled a 30 inch vacuum according to my gauges. Unfortunately the wires inside were damaged when they came in contact with the centrifugal switch causing the start capacitor to fail.
1212609
The motion seems to give an extra cleaning boost.that's the only difference I know of .Hope it helps!
1183941
No clue. You'd have to look at the fittings on the unit. Either they are 1/4" or they aren't. Technically, you'd only need to pull a vacuum on one but if you could pull from both the high and low sides, it might go faster.
1976938
I have not noticed any difference, I don't know technically if it does. I have not found any where that has allowed air to pass being that it had pulled away . I was just running new water and sewage lines in the basement and was inspecting for air leaks of places that I missed on the original install. I found none. You might want to contact the manufacture for technical data. They were very helpful and addressed all questions. I used the closed cell exclusively . Full fill . I can tell I am BLOWN AWAY with the low cost of my heating this year so far. I have used only 1/4 tank of oil. I keep that house at 70 degrees. I live in western pa. Hope this helps
996945
Yes, as in the description it has a vacuum jar for brakes so yes it via the rotation of a selector changes from pressure to Vac. Please note this is a general service tool for automotive work, not accurate instrumentation work.
1178396
http://wiki.answers.com/Q/What_is_the_difference_between_eureka_4870_vacuum_models&src=ansTT
2008611
Yes, When You Have A Vacuum pump attached to draw the system down, The blue, low pressure side will drop below 0 to -10 -20 -30 vac, of course you leave the vacuum on for 30 to 40 minutes. shutoff vac pump and if the vac stays @ -30 for 30 to 40 min you have a good tight system ready for Freon.
1459323
its called economy. The fan runs slower but I don't recall if the unit actually turns off when the compressor stops.
1940234
The compressor hooks up to it, when you push the button it blows high pressure air through an air venturi which pulls a vacuum. Google Air Venturi, this will explain in much better detail. I will say, it pulls a rather nice vacuum, pulled my radiator hoses flat. :) It is also a good way to check for leaks before putting fluid in the system, if there is a leak it will not hold vacuum and in my case it would not even create a vacuum, I had forgotten to close the radiator drain.
1075336
Technically, it is not lifting but pushing - there is a limit to what a vacuum pump can pull, so I think this type of pump can push more - of course this type of pump also has a limit. I use it to reach into my sailboat bilge located in its shoal draft keel, then up to the lower edge of the hatch opening & out. I need to extend my whole arm down there to touch bottom with my shoulder a few inches below the hatch opening, so I estimate the total vertical distance is about 3 feet 4 inches. This unit easily pumps water up that height, and still pumps it out at a healthy velocity. It's also the only pump I have found that can fit into that very small space. Technically, it is not lifting but pushing - there is a limit to what a vacuum pump can pull, so I think this type of pump can push more - of course this type of pump also has a limit. I use it to reach into my sailboat bilge located in its shoal draft keel, then up to the lower edge of the hatch opening & out. I need to extend my whole arm down there to touch bottom with my shoulder a few inches below the hatch opening, so I estimate the total vertical distance is about 3 feet 4 inches. This unit easily pumps water up that height, and still pumps it out at a healthy velocity. It's also the... » Read More Technically, it is not lifting but pushing - there is a limit to what a vacuum pump can pull, so I think this type of pump can push more - of course this type of pump also has a limit. I use it to reach into my sailboat bilge located in its shoal draft keel, then up to the lower edge of the hatch opening & out. I need to extend my whole arm down there to touch bottom with my shoulder a few inches below the hatch opening, so I estimate the total vertical distance is about 3 feet 4 inches. This unit easily pumps water up that height, and still pumps it out at a healthy velocity. It's also the only pump I have found that can fit into that very small space. « Show Less
1136269
The red "on" switch has to be held up the entire time the vacuum services are required. Once released, the vacuum does not continue functioning. I've checked the instruction pamphlet several times but am unable to find anything to the contrary.
980971
I purchased this item as a gift. But did notice it had a vacuum hose which I assumed was to do just that. Sorry I couldn't really answer your question completely.
1143484
To me, it merely moves air, which is what I want it to do. It has three speeds and oscillates. It is extremely quiet and serves our purpose perfectly. Whether it purifies that air at all, I have no clue. Can't tell the difference.