Brake booster push rod adjustment? 1969 mach 1 - Vintage Mustang Forums
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post #1 of 15 (permalink) Old 07-12-2018, 08:47 PM Thread Starter
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Brake booster push rod adjustment? 1969 mach 1

I have original front disc / rear drum brakes and no matter what I do, my pedal has play. It goes half way down before engaging brakes. I did a brake bleed, changed master cylinder, replaced brake hose, etc. I cannot seem to get the brake pedal higher. I've checked brake lines and do not see fluid levels going down so don't think there is a leak. should I check push rod adjustment? is there a tool to set the push rod adjustment?
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post #2 of 15 (permalink) Old 07-12-2018, 08:57 PM
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Sounds just like mine. Car stops doesn't it ? I think you will find that is the normal stock pedal location. Brian

5R09A 4 Speed GT Built 5/29/65
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post #3 of 15 (permalink) Old 07-12-2018, 09:00 PM
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Originally Posted by rindel View Post
is there a tool to set the push rod adjustment?
Baer makes a "H" shaped brake rod adjustment tool

1966 2+2, 289 A code, AOD AT, 3.55 Currie Traction Lock, PS, PDB, AC, Pony deluxe interior & Rally Pac
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post #4 of 15 (permalink) Old 07-12-2018, 09:55 PM
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The shop manual covers the dimensions of the push rod depth tool. I think it was 1. I remember routing a block of wood into a C shape out to the spec and adjusting mine.
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post #5 of 15 (permalink) Old 07-12-2018, 11:25 PM
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post #6 of 15 (permalink) Old 07-12-2018, 11:30 PM
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Quote:
Originally Posted by rindel View Post
I have original front disc / rear drum brakes and no matter what I do, my pedal has play. It goes half way down before engaging brakes. I did a brake bleed, changed master cylinder, replaced brake hose, etc. I cannot seem to get the brake pedal higher. I've checked brake lines and do not see fluid levels going down so don't think there is a leak. should I check push rod adjustment? is there a tool to set the push rod adjustment?
Where is your booster from?
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post #7 of 15 (permalink) Old 07-12-2018, 11:37 PM
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The headspace should be 0-.012".


Amateur restorer. Well, sometimes I have been paid for it. But not right now.
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post #8 of 15 (permalink) Old 07-15-2018, 05:37 PM Thread Starter
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where can i get that h shaped tool?
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post #9 of 15 (permalink) Old 07-15-2018, 05:39 PM Thread Starter
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it is either original booster or replacement with genuine part. I bought the car in 2014 that way.
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post #10 of 15 (permalink) Old 07-15-2018, 06:21 PM
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post #11 of 15 (permalink) Old 07-15-2018, 08:20 PM
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Originally Posted by prelag View Post
Where is your booster from?
search the web for "Baer Push Rod Length Gauge"

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post #12 of 15 (permalink) Old 09-03-2018, 06:04 PM Thread Starter
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I just finished adjusting the break booster rod which was off about 3/16 of an inch.* That fixed the loose brake pedal.* I used your template*for the bendix rod adjustment.
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post #13 of 15 (permalink) Old 09-03-2018, 07:03 PM
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Wow! That's .1755" out of spec. No wonder it didn't work well.

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post #14 of 15 (permalink) Old 09-04-2018, 11:56 AM
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I put a dab of grease on the end of the rod.
Test fit the MC on.
Did grease transfer to MC? (look inside)
Adjust rod until grease transfers and back off a smidge.


Good-to-go!

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post #15 of 15 (permalink) Old 09-04-2018, 05:43 PM
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Quote:
Originally Posted by Daisy View Post
I put a dab of grease on the end of the rod.
Test fit the MC on.
Did grease transfer to MC? (look inside)
Adjust rod until grease transfers and back off a smidge.


Good-to-go!
Creative folks usually can find a method.
Paint work great as well. Kinda like shooting artillery, Shot, observe, Shot again, observe, Adjust--BINGO!!
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