| ab4875 | -- 01-21-2014 @ 5:37 PM |
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I am setting up the wipers on my 1946 Deluxe Business Coupe at the moment. There are are three ports on the wiper switch. I connected the larger port on the left hand side of the attached photo to the carburetor and the larger port on the right hand side to the vacuum motor and it works fine. I'm just not sure where I should connect the smaller middle port to? Thanks Andrew
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| kubes40 | -- 01-22-2014 @ 6:17 AM |
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I've never seen a switch like that for a '46. Still, the correct wiper motor has two vacuum ports. The correct switch has three ports in a single row. The center one receives vacuum while the left and right nipples are attached to the left and right ports of the motor. It appears you may have switch that will at least work in your car but have the wrong motor.
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| cliftford | -- 01-22-2014 @ 8:21 AM |
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Unless this is a show car and you want to keep it 100% origional, I would install electric wipers. The old vacuum wipers [ without the boost on the fuel pump] are slow, unreliable,especially when the vacuum drops going up hill,and in my opionion just plain dangerous in heavy rain. That's my 2cents worth.
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| supereal | -- 01-22-2014 @ 2:25 PM |
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Like my friend Mike, I haven't seen a switch quite like that. Two systems were used, according to the Club's 41-48 book, which I recommend to you. They are the King-Seely, and the Trico. The book shows the wiper motor, switch, and linkage on page 2-17. As Mike notes, the center tap receives the vacuum, and the others are connected to the motor(s). Some applications, usually trucks, had two separate motors and needed two motor taps, so the valve, also shown in the green book, was apparently a "universal" replacement.
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| ab4875 | -- 01-22-2014 @ 7:08 PM |
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Thanks guys, I ordered the Club's book last week but it will probably take a while to reach Oz. I've got a few of the other Flathead books but they don't seem to go into much detail. There's a combined car show on in Sydney for Australia Day (26th Jan) so I'll take a look at a few of the early V8s there to see what they have. I wonder if the switch I have was a Canadian version?
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| Old Henry | -- 01-22-2014 @ 8:53 PM |
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Since you've ordered the book here is a little jump on it. This is the main article about wipers.
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| Old Henry | -- 01-22-2014 @ 8:53 PM |
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This is the diagram over the page.
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| Old Henry | -- 01-22-2014 @ 8:54 PM |
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This is the info re the switches. This message was edited by Old Henry on 1-22-14 @ 8:55 PM
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| ab4875 | -- 01-22-2014 @ 8:58 PM |
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Thanks Old Henry. Those drawings are very helpful.
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| Old Henry | -- 01-22-2014 @ 9:07 PM |
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Of the two connections to the wiper motor, one runs the motor and the other parks the wipers, i.e. returns them to home and keeps them there. From the diagram of the '41 switch it appears that the center was for the vacuum source, the larger port to run the motor and the smaller one to park it. So, your switch may follow the same pattern - one of the large ones for the source, the other to run the motor and the small one to park it. You can tell whether it works that way by blowing into one large one and see which port the air comes out. Then turn the switch to the other side and see if it comes out another. If so, the one you blew into is for the source. If it didn't work that way try other alternatives until you identify the port common to both others, that is the source. Should be one of the big ones. If so, hook the other big one to the port on the motor that runs it and the small one to the other port that parks it. Let us know how it goes. This message was edited by Old Henry on 1-22-14 @ 9:14 PM
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| Old Henry | -- 01-22-2014 @ 9:13 PM |
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Just in case you haven't actually experienced vacuum operated wipers, here are a few videos I made of how they go, the good and the bad. 1. https://www.youtube.com/watch?v=Wzaz7laBsRE 2. https://www.youtube.com/watch?v=Q-8N0eT-neQ 3. https://www.youtube.com/watch?v=e2e6DcjEj6c 4. https://www.youtube.com/watch?v=VONZdWVH6A4 This message was edited by Old Henry on 1-22-14 @ 9:17 PM
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