Mechanical brake pedal return spring
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Mechanical brake pedal return spring
My rigid frame panhead with mechanical brakes never had a return spring on the foot pedal. The spring to the stoplight switch lightly pulls the pedal back rearward. Although I'm used to riding it this way, it doesn't seem right.
In the spare parts catalog for 1941-1954 it shows a small rod 72019-39 that connects the spring on the stoplight switch to the small bracket on the rod.
In the same catalog under '61, 74" and 80" rear brake parts it shows a spring 42427-26 that attaches to the same bracket on the rod 422080-35.
Could some of the experts let me know how the spring attaches to keep the pedal in a more forward position? A picture would be very helpful.
Thanks in advance.
In the spare parts catalog for 1941-1954 it shows a small rod 72019-39 that connects the spring on the stoplight switch to the small bracket on the rod.
In the same catalog under '61, 74" and 80" rear brake parts it shows a spring 42427-26 that attaches to the same bracket on the rod 422080-35.
Could some of the experts let me know how the spring attaches to keep the pedal in a more forward position? A picture would be very helpful.
Thanks in advance.
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Re: Mechanical brake pedal return spring
There is a hefty spring between the brake pedal and rear floorboard stud.
http://www.jpcycles.com/search/search?N ... 33&Ntk=All
http://www.jpcycles.com/search/search?N ... 33&Ntk=All
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Re: Mechanical brake pedal return spring
Here's a blowup of the rear brake pedal taken from an old factory photo.
If you look closely, you can see the spring; one end is hooked in the bottom hole on the pedal, the other is hooked in a hole in the footboard stud.
If you look closely, you can see the spring; one end is hooked in the bottom hole on the pedal, the other is hooked in a hole in the footboard stud.
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Re: Mechanical brake pedal return spring
Thanks Bigincher and Panhead. It's not visible in the picture but I'm guessing that the pull wire 720019-39 connects to the spring on the stoplight switch to lengthen the pull when the spring is attached to the pedal and pulls it forward.
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Re: Mechanical brake pedal return spring
My foot board stud does not have a hole in it. The way the spring is mounted it would tend to pull the pedal rearwards.
What keeps the pedal in a somewhat vertical position when the brake isn't being used?
What keeps the pedal in a somewhat vertical position when the brake isn't being used?
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Re: Mechanical brake pedal return spring
You can drill a hole in the rear floorboard stud or get another stud with the hole.
The brake rod adjustment (between pedal and cross over) controls where the pedal stops.
The brake rod adjustment (between pedal and cross over) controls where the pedal stops.
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Re: Mechanical brake pedal return spring
Thanks Panhead. Now it makes sense. The PO shortened the adjustment rod almost to the max so he could attach a short spring between the stoplight switch and the bracket on the adjusting rod. He eliminated the pull wire and the return spring. So what I need to do is adjust the rod to the correct length, fashion a pull wire from the spring on the stoplight switch to the bracket on the rod, and attach a return spring.
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Re: Mechanical brake pedal return spring
The pull wire does not connect to the pedal. It goes to a bracket on the rod that doubles as a pedal lock for tire changes. If your stud has no hole it is most likely off of a Duo-Glide rather than a rigid and is shaped differently than the proper one.
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Re: Mechanical brake pedal return spring
Roger that Robbie. Bike was assembled from a lot of parts so the foot board stud could be the wrong one. I understand that the pull wire goes to the bracket on the rod. How does the bracket double as a pedal lock as mine was installed improperly?
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Re: Mechanical brake pedal return spring
FL54 wrote:Roger that Robbie. Bike was assembled from a lot of parts so the foot board stud could be the wrong one. I understand that the pull wire goes to the bracket on the rod. How does the bracket double as a pedal lock as mine was installed improperly?
Looks to me like you'd loosen it off and slide it back to remove the brake light spring. Apply brake and slide it so the tab is against the footboard stud and tighten. Should keep the brake applied.
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Re: Mechanical brake pedal return spring
The end with the wingnut points forward. When the brake is going to be locked, the wingnut is loosened, the pedal pushed forward to lock the brake, and the bracket slid on the rod to contact the rear footboard stud and then tightened. The brake is now locked on until the bracket is loosened and moved back to its original position. Of course the brake switch pull needs to be re-attached and adjusted.
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Re: Mechanical brake pedal return spring
Thanks guys. That is all good information to know. Hopefully , I won't ever need to use the brake lock but it's good to know how it works.
Thanks again.
Thanks again.