I have an old Delaval vacuum pump from that era, can't think of the model number now but it is old enough it has steel veins not fiber like anything in the last 40 years. It is just a normal vacuum pump that we used to run pneamatic pulsators on either surge or delaval buckets. I think I know what you are asking about, I think they are actualy from the 60s, the back of the pump had a generator that created juice to run the first type electronic pulsators. I saw a guy one time that something in his system went bad so he jigger rigged it by hooking up a battery charger to the system to run the pulsators. Not a good idea. This same guy had a water line break to the cups one time and it was to much work to fix it, so he just hooked up a garden hose with a float to the recesses manger. Put the cows feed out in front of the manger where they couldn't reach it while laying down in the stanchion. They quit using the silos because they were just to much work, so all the cows ate for forage was those goofy AC roto bales.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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