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Old 10-21-2012, 01:01 PM   #1
Woogeroo
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Question 1969 dual MC in a '65 c10 - brake rod length questions

Howdy folks.

I have a 1965 c10, but it has a 1969 dual pot, power brake master cylinder on it.

Below is a photo of my brake rod that connects from the brake pedal to the MC assembly.

This brake pedal push rod is from a 1965 Chevrolet C10 pickup(at least, that is what it came off of) is 8 5/8 inches long from the round end to the threaded end.

7/16 - 20 thread.

more pics, here

My question is this... is there a '67-'72 brake pedal rod that is longer, but will fit in the same place?

A lot of stuff on my truck is from different years, etc..



Thanks a bunch for any information.

-W
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Old 10-21-2012, 10:52 PM   #2
vwnate1
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Exclamation Short Answer :

Yes .

IMPORTANT !! you must be very careful when mixing and matching MC push rods ! too short and they can fall out of the MC and you LOOSE TOTAL BRAKES .

Too long and the MC piston will have slight pressure all the time , this creates internal pressure that can lock the brakes while you're driving , blow seals and so on .

I just went through this on my '69 C/10 when I installed factory power brakes .

The push rod has a threaded adjustment length and lock nut , it's VERY important to snug up the locknut after the push rod is adjusted to when the pedal is released and fully drawn back against it's stop by the spring , the push rod can *just* be rattled by hand ~ no more than 1/4" freeplay MAX.

Just go to a Self Service Junkyard and yank a few push rods out ,you'll soon be able to make up a good one .
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Old 10-22-2012, 01:46 PM   #3
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Wink

vwnate1 - thanks for the response.

I don't see any of my local yards having something that old, but I'll keep an eye out.

-W

----

a fella on another forum wrote this to me(someone may find it useful some day):

I measured an assembled 71 brake rod and it is 10" end to end as measured on the outside. Hole spacing is 9 1/4" with approximately 7/16" thread engagement. Thread is 7/16-20.

Power brake pedal is a lot lower then manual brakes and the 67-72 power brake rod is the same length from the many trucks that I have had apart.

There are a couple of different lengths on the booster mount but I am not sure if this will affect the pedal height.

JimKshortstep4x4
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Old 10-26-2012, 08:47 AM   #4
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Post M/C Push Rod

You only have to begin taking them out of whatever year trucks & cars you find until you find the proper size eyelet and at least as long as necessary , then you can adjust or trim it to suit ~ .

No need for specific year model nor even the brand.....

Such is the nature of Hot Rodding .
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