Testing Vacuum wipers at the work bench

M

mrraford

Senior Member
I've been working on several vacuum wipers recently. Time to give them a test and tweak. Anybody have a suggestion for a cost effective vacuum source at my work bench?
 
if you have a air compressor and can tolerate the noise a venturi vacuum pump is cost effective to buy new.
yYou could go to the you pull it junkyard and search the cars for booster pump.
some cars mostly european had a small vacuum pump for cruise control.
the cheapest is a piece of hose to suck on with your mouth.
And of course running gasoline engine usually can supply vacuum.
And the hand vacuum pumps.
A distributor machine usually has a adjustable vacuum pump too.
 
I use my vacuum pump that I bought for casting work. Search on Google or Amazon to find a low cost one.
 
Could you not just run a rubber hose from the manifold and hold the wiper in your hand while the car is running?
 
The intake on an air compressor might work, would probably need a means to regulate it.
 
If you have a vacuum gauge you can test all the ideas that people have come up with. I don't think a mouth is a good tool for this application.
 
The 12-volt pumps for power brake vacuum are generally equivalent to the manifold air pressure of an automobile engine. They shouldn't break the bank on price. A mighty vacuum hand pump might work but your hand would get tired.
 
I have used one of the hand vacuum pumps for checking automotive vacuum controls. Just pump away and slowly the wiper will stroke and return.

John
 
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