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04-04-2021, 04:46 PM | #1 |
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Join Date: Sep 2020
Location: Hooper, Utah
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Very Firm Brake Pedal
Happy Easter,
So, any ideas for why after bleeding my 1940 3/4 ton brakes I have such a firm pedal that it hardly moves at all? I rebuilt the master cylinder, fixed a few leaks, used speed bleeders for the bleed. I did not remove the hubs to check or adjust anything since I did not have the proper hub remover. I did not adjust the pedal rod. Brake pedal spring is in place. Thanks. Dale |
04-04-2021, 05:21 PM | #2 | |
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Re: Very Firm Brake Pedal
Quote:
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04-04-2021, 05:26 PM | #3 |
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Re: Very Firm Brake Pedal
Possible that the brake hoses are clogged/collapsed on the inside.
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04-04-2021, 05:40 PM | #4 |
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Re: Very Firm Brake Pedal
Adjust the brake pedal rod!!
x2
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04-04-2021, 07:05 PM | #5 |
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Re: Very Firm Brake Pedal
take it for a ride it may be ok
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04-04-2021, 08:16 PM | #6 |
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Join Date: Sep 2020
Location: Hooper, Utah
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Re: Very Firm Brake Pedal
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04-04-2021, 08:17 PM | #7 |
Member
Join Date: Sep 2020
Location: Hooper, Utah
Posts: 79
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Re: Very Firm Brake Pedal
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04-04-2021, 08:20 PM | #8 |
Member
Join Date: Sep 2020
Location: Hooper, Utah
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Re: Very Firm Brake Pedal
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04-04-2021, 09:22 PM | #9 |
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Join Date: May 2010
Location: upstate SC
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Re: Very Firm Brake Pedal
the master cylinder rod should "rattle" or have a small amount of free play or otherwise every time you step on the brake it is building pressure and thus not releasing the brake
cylinders |
04-04-2021, 09:38 PM | #10 | |
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Join Date: Sep 2011
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Re: Very Firm Brake Pedal
Quote:
released at bleeders then adjusted forsome free pedal travel. Dont drive it in this condition ie nil free pedal travel. Phil NZ |
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04-05-2021, 06:21 AM | #11 |
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Join Date: Sep 2014
Location: Wiscasset, Maine
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Re: Very Firm Brake Pedal
Grab the brake rod and make sure you can move it in and out at least 1/16" or that it rattles like Alan mentioned above.
Glenn |
04-05-2021, 06:33 AM | #12 |
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Location: Auburn, MA
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Re: Very Firm Brake Pedal
Like guys said about the master cylinder actuating rod. The plunger returns to be against a snap ring, which fully releases the pressure. It does not work right if that does not happen.
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04-05-2021, 01:22 PM | #13 |
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Join Date: Oct 2015
Location: Socal
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Re: Very Firm Brake Pedal
Although probably not your issue, having brand new hoses doesn't guarantee perfection. I've seen them "necked down" in the middle of the hose, right
out of the box. (and these weren't offshore items either) Five other shops didn't catch the customer's problem, which was a massive pull to the left under braking. |
04-05-2021, 01:28 PM | #14 |
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Re: Very Firm Brake Pedal
I agree with the previous advice of adjusting the pedal rod.
It's also possible that dorvedahl47pu has dragging brakes due to this situation...... which others have also indicated. |
04-05-2021, 08:04 PM | #15 |
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Re: Very Firm Brake Pedal
you said you rebuilt the master cyl. are you sure you installed the check valve in the right drecation
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04-06-2021, 06:35 AM | #16 |
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Re: Very Firm Brake Pedal
This bulletin shows the master cylinder parts assembly.
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