Replacing pedal shafts

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cwhuntersr
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Replacing pedal shafts

Post by cwhuntersr » Tue Aug 06, 2024 9:51 am

As part of an rebuild, I'm replacing my pedal shafts that are scored and worn down. If I'm replacing the pedal cams/supports and notches too, do I get standard sized shafts or do I buy oversized shafts and ream everything out to an oversized shaft size?

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JTT3
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Re: Replacing pedal shafts

Post by JTT3 » Tue Aug 06, 2024 10:01 am

Check the clearance and if not within specs, bush or go oversize based on your measurements. Something to consider, If or when you ream, the ream will follow the hole.
So unless you have the ability & fixtures to achieve the desired position you might consider having a machinist to complete the job. Best John


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cwhuntersr
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Re: Replacing pedal shafts

Post by cwhuntersr » Tue Aug 06, 2024 10:08 am

Thanks John - I should have everything necessary to ream everything myself, just want to make sure I don't do any unnecessary work

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Re: Replacing pedal shafts

Post by Tadpole » Tue Aug 06, 2024 10:24 am

Probably common knowledge, but when you replace the shafts don't forget the o-rings that mount against the hogshead, I did and it ain't a big deal but my pedals do leak some.

https://www.mtfca.com/phpBB3/viewtopic.php?t=266


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cwhuntersr
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Re: Replacing pedal shafts

Post by cwhuntersr » Tue Aug 06, 2024 11:06 am

Thanks Tad - I've owned the o-rings for a few months now and have been waiting on the rebuild after seeing how scored the pedal shafts were

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Re: Replacing pedal shafts

Post by JTT3 » Tue Aug 06, 2024 12:09 pm

I may be disremembering but at some time wasn’t someone making adjustable pedal shafts that could be adjusted on the outside of the hogshead? Best John


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Re: Replacing pedal shafts

Post by speedytinc » Tue Aug 06, 2024 12:39 pm

JTT3 wrote:
Tue Aug 06, 2024 12:09 pm
I may be disremembering but at some time wasn’t someone making adjustable pedal shafts that could be adjusted on the outside of the hogshead? Best John
True. Chaffins sells the good ones.

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Re: Replacing pedal shafts

Post by RajoRacer » Tue Aug 06, 2024 1:12 pm

Otis Clinton from Federal Way, WA was the supplier of those accessory adjusters many years ago - I still have some of them.


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cwhuntersr
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Re: Replacing pedal shafts

Post by cwhuntersr » Tue Aug 06, 2024 1:40 pm

Thanks - I will check those out!


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Re: Replacing pedal shafts

Post by AndyClary » Tue Aug 06, 2024 9:40 pm

I got Chaffin’s adjusters and they are just oversized enough I didn’t have to ream the hogshead. I used an over sized low shaft and you really only have to touch it unless your bore is really bad and you might have to bush the hogshead.

Andy


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Re: Replacing pedal shafts

Post by speedytinc » Tue Aug 06, 2024 11:21 pm

AndyClary wrote:
Tue Aug 06, 2024 9:40 pm
I got Chaffin’s adjusters and they are just oversized enough I didn’t have to ream the hogshead. I used an over sized low shaft and you really only have to touch it unless your bore is really bad and you might have to bush the hogshead.

Andy
Glad you noticed. Ford reamed the hole .625 & made the shafts under for clearance.
The adjuster "tubes" are .625. So the wear in the holes appears lesser. I.E the adjusters are slightly oversize.


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cwhuntersr
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Re: Replacing pedal shafts

Post by cwhuntersr » Wed Aug 07, 2024 10:23 am

Those adjuster shafts are such a simple, but great idea! Any knowledge if they interfere with the aftermarket brake levers?


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Re: Replacing pedal shafts

Post by speedytinc » Wed Aug 07, 2024 11:03 am

cwhuntersr wrote:
Wed Aug 07, 2024 10:23 am
Those adjuster shafts are such a simple, but great idea! Any knowledge if they interfere with the aftermarket brake levers?
I dont understand your question. As long as the pedal has cams, they work.
I use a 25-27 bendix mount brake lite switch. Works fine.
The extra protrusion doesnt effect the switch function.


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Re: Replacing pedal shafts

Post by Allan » Wed Aug 07, 2024 9:05 pm

What is an aftermarket brake lever?

Allan from down under.


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cwhuntersr
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Re: Replacing pedal shafts

Post by cwhuntersr » Thu Aug 08, 2024 2:13 pm

Probably not the right terminology - the added piece welded to the pedal for actuating a master brake cylinder


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Re: Replacing pedal shafts

Post by RVA23T » Thu Aug 08, 2024 2:37 pm

cwhuntersr wrote:
Thu Aug 08, 2024 2:13 pm
Probably not the right terminology - the added piece welded to the pedal for actuating a master brake cylinder
For accessory / aux brake systems like this:
pedal w acess stem.png
Last edited by RVA23T on Thu Aug 08, 2024 6:34 pm, edited 1 time in total.
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Re: Replacing pedal shafts

Post by speedytinc » Thu Aug 08, 2024 3:53 pm

They will work on this pedal. You may have to shorten the 5/8 tube to retain the O-ring seal in the pedal.
Follow the instructions. Remember, if your pedal no longer leaks a bit, you will need to manually oil the cams


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Re: Replacing pedal shafts

Post by Ken Buhler » Fri Aug 09, 2024 12:03 am

If you use .005 OS shafts, turn down the length of shaft going through the pedal to stock or you will make the pedal OS forever. And you will see useable pedals increasingly in demand.
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cwhuntersr
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Re: Replacing pedal shafts

Post by cwhuntersr » Fri Aug 09, 2024 10:08 am

Thanks Richard - that's exactly what I was talking about

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