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04-05-2020, 09:39 PM | #1 |
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Join Date: Oct 2013
Location: Mayberry
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40 brake question
Hi all.
My 36 has been swapped over to later juice brakes. There are castle nuts on the backing plates. Are they supposed to be individually secured with cutter keys or safety wire? |
04-05-2020, 09:53 PM | #2 |
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Join Date: May 2010
Location: Coral Springs FL
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Re: 40 brake question
Here's some backing plate bolts off my 40. Looks like they have a hole for cotter pin.
I would also use Locktite. Washers are those old Ford thick lock washers. Last edited by 19Fordy; 04-05-2020 at 10:10 PM. |
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04-05-2020, 10:04 PM | #3 |
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Re: 40 brake question
Assuming the castle nuts were correct why would Ford use a castle nut and not a cotter key? Don't know, just wondering.
Charlie Stephens |
04-05-2020, 11:46 PM | #4 |
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Re: 40 brake question
Those bolts on my cars have holes in them for cotter keys. Look closely and see if the remnants of a cotter key is in the hole and looks like threads.
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04-06-2020, 07:01 AM | #5 |
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Re: 40 brake question
Slotted nuts and cotter pins which later gave way to lock nuts; but never any lock washers unless someone else was there first; and I have removed untold numbers of early Ford car and truck brake assemblies.
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04-06-2020, 07:55 AM | #6 |
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Re: 40 brake question
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04-06-2020, 07:57 AM | #7 |
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Re: 40 brake question
Actually they did not use castile nuts. Rather, Ford used slotted hex nuts. A cotter pin was in fact used in all four (per plate) application.
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04-06-2020, 12:00 PM | #8 |
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Re: 40 brake question
Thanks "KUBE". You just made me smarter.
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04-06-2020, 01:28 PM | #9 |
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Join Date: Oct 2013
Location: Mayberry
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Re: 40 brake question
thanks all. I'm going through the whole chassis of a car that was in final assembly with the PO passed way to nut and bolt things and make sure everything is as it should be before I hit the road.
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04-06-2020, 03:11 PM | #10 |
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Re: 40 brake question
When I took the backing plates off my '46 Coupe, the nuts looked like castellated nuts, but the slots were too small to insert a cotter pin in. I found on page 679 in the Green Book that Ford called them free running locknuts. When I took a sample to the local fastener supplier, he called them Marsden locknuts. When I told him that they didn't act like a locknut, he explained that the clamping side of the nut is undercut near the hole leaving a bit of a raised edge around the perimeter of the nut, and the slots on the outer face of the nut allows the top half of the nut to squeeze inward when the nut is torqued down, causing the upper half of the nut to clamp onto the bolt.
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04-06-2020, 03:51 PM | #11 |
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Re: 40 brake question
Hang around me more, that'll change. And, not for the better
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04-06-2020, 03:53 PM | #12 | |
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Re: 40 brake question
Quote:
On a '40 Ford they are in a grand total of two places.
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04-09-2020, 10:36 AM | #13 |
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Re: 40 brake question
My '42 came with cotter pins.
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