| 37 Coupe | -- 08-12-2013 @ 9:06 AM |
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Never paid much attention to this detail before yesterday when the 37 coupes windshield wiper failed on me during a downpour. Wiper motor works fine but repro Bob Drake arm does not stay snug to the wiper motor shaft. Is the concept a serated inside diameter on the arm to tighten to a non serated brass shafts taper? This is the two mating parts I have. I have the original and correct black arm but it is damaged on the part that hold blade. It looks the same,serated inside diameter,but am I missing something on the brass shaft part?,seems it should also be serated or grooved to match. Nothing to clue me in 37 Ford book.
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| Lincoln | -- 08-12-2013 @ 12:45 PM |
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The 1937 BOOK shows the wiper shaft with a hole in it which should mate up with the "wire-type" wiper arm, such as used on 1936 and earlier wipers. Those original early wipers did not use the serrated wiper shaft and arms. During later 1936, Ford changed the wire-type arm to a flat-type arm which looked different but still used a wire connector which hooked to the hole in the wiper shaft. I thought that Ford went to the Lock-on type wiper in 1937, but maybe the Book does not spell this out, as the Book shows only the wire-type. Yet the Book only shows the Lock-on type arm, which is totally different than the wire-type. You may have a later Replacement wiper setup which takes the Lock-on arm with its serrations that should match up with a "drive adapter" (?) with both internal and external serrations. I believe Trico made up different adapters years ago for changing from one type of Trico motor to another, but am not sure. Maybe someone else will chime in with more information. Lincoln
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| TomO | -- 08-13-2013 @ 7:57 AM |
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The arm is held to the motor with a nut that screws onto the shaft. This is shown clearly on page 636 of the Green Book. Here is a link to an online copy of the book. http://www.norgv8club.org/norg/index.php/headliner-newsletters-and-tech-tips/category/11-parts-diagrams Tom
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| 37 Coupe | -- 08-13-2013 @ 8:40 AM |
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Tom,thank you for pointing out the exploded view in the Green book. I sometimes forget to reference it and rely on the 37 book. I think the problem is the Bob Drake repro stainless arm. The original black one I have from my standard coupe has more spring tension to the windshield and snugs up better on the tapered end of the motor shaft. I am going to do what I should have done years ago,clean up the original plain old black one that is correct anyway.The exploded view clearly shows that the nut draws down on the arm serrated hole and this is supposed to grip the small tapered end of the motor shaft.Really not a very good design being the serrated inside of the arm looks straight,not tapered as its mating shaft.Like trying to pull up a rear brake drum with a straight hole to a tapered axle shaft and expecting it to stay in place. Thanks again. This message was edited by 37 Coupe on 8-13-13 @ 9:09 AM
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| TomO | -- 08-14-2013 @ 7:32 AM |
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You are welcome. If you are still having problems,contact Ficken Wiper service, he may have a NORS arm. The same black arm was used on commercial vehicles until 1942. Tom
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