Re: Windshield wipers not working

Posted by HH56 On 2008/12/18 0:32:20

That black cylinder is the co-ordinator and is part of the washer system. It would get vacuum from the Packard washer to operate, but if the car had not had a washer option, would not be there at all. It's function is to turn on the wipers when you push the button, and turn them off a few seconds after the water stops. Since you no longer have the Packard setup, it will just sit there and look pretty. As long as it is free to slide when wipers turned on, won't hurt a thing.

The vacuum pump is marginal at best and was there as an addition to the manifold vacuum which goes away under some load conditions or when throttle is wide open. Packard always had an extra vacuum source that supposedly would keep the wipers working under low manifold conditions. It's a nice theory but not always successful. Most other mfgs did without or used a dual action fuel pump. Anyway, this is supposed to be an extra bit and when manifold goes away, balancing valve cuts that source off and vacuum pump takes over keeping the wipers moving. Sometimes it works. The extra oil should not affect it.

Here is a description of the wipers and claimed speeds. The small hoses are 1/8.

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