Brake Pedal Rod into MC, How to adjust before installation ? |
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Brake Pedal Rod into MC, How to adjust before installation ? |
jim_hoyland |
Mar 27 2014, 10:47 AM
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#1
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Get that VIN ? Group: Members Posts: 9,302 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
I have a refinished Bruce Stone pedal cluster and new PMB master cyclinder. I want to know how the plunger (rod ) from the brake pedal to the MC gets adjusted before installation. Looks like there is considerable latitude here.
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SLITS |
Mar 27 2014, 11:12 AM
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#2
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Think about it Jim .... the pistons have to fully return when the pedal is released. So, 1/8 to 1/4 turn on the screw away from contact should suffice. if you know the thread pitch, you could exactly figure the "play".
The actual measurement is 1 mm (0.04"). |
bdstone914 |
Mar 27 2014, 02:06 PM
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#3
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bdstone914 Group: Members Posts: 4,522 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
Think about it Jim .... the pistons have to fully return when the pedal is released. So, 1/8 to 1/4 turn on the screw away from contact should suffice. if you know the thread pitch, you could exactly figure the "play". The actual measurement is 1 mm (0.04"). Jim, The adjustment will be a little loose if you adjust it with the MC and pedals out of the car. The thickness of the firewall will increase the play by the thickness of the metal. Bruce |
jim_hoyland |
Mar 27 2014, 03:23 PM
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#4
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Get that VIN ? Group: Members Posts: 9,302 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
Can the adjustment be made after the MC and pedal cluster are installed in the car; or, should I bolt them together on the bench and adjust ?
Having a difficult time visualizing... (IMG:style_emoticons/default/smile.gif) |
SLITS |
Mar 27 2014, 04:30 PM
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#5
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
Install and adjust on car
or measure thickness of metal between the MC and assembly (otherwise known as the forward firewall). Add that to the length of the rod if adjustment is out of the car. or place a piece of metal the same thickness of the forward firewall between the assembly and MC. Adjust from there. Actually, if the rod hasn't been tampered with, it has a very good chance of not needing to be adjusted. |
jim_hoyland |
Mar 28 2014, 07:03 AM
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#6
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Get that VIN ? Group: Members Posts: 9,302 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
OK, sounds good. Last question; can the rod be adjusted when both MC and pedal cluster are installed ?
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DRPHIL914 |
Mar 28 2014, 09:47 AM
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#7
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Dr. Phil Group: Members Posts: 5,766 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
OK, sounds good. Last question; can the rod be adjusted when both MC and pedal cluster are installed ? jim, glad you asked these question, because as i just finished replacing my MC, i had not even considered the need to adjust or set the depth of travel etc of the rod on the pedal cluster. I have a rebuild cluster that i was thinking of putting in, but the old one seems fine, so i probably dont have to make and adjustment since i did not change it yet, but at some point i will. I guess i should not assume the last person that messed with it had it adjusted correctly, so that leads to the question, how do i know it is set right and pressing in the piston fully or properly? (IMG:style_emoticons/default/idea.gif) |
jim_hoyland |
Mar 28 2014, 11:07 AM
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#8
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Get that VIN ? Group: Members Posts: 9,302 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
(IMG:style_emoticons/default/agree.gif)
OK, sounds good. Last question; can the rod be adjusted when both MC and pedal cluster are installed ? jim, glad you asked these question, because as i just finished replacing my MC, i had not even considered the need to adjust or set the depth of travel etc of the rod on the pedal cluster. I have a rebuild cluster that i was thinking of putting in, but the old one seems fine, so i probably dont have to make and adjustment since i did not change it yet, but at some point i will. I guess i should not assume the last person that messed with it had it adjusted correctly, so that leads to the question, how do i know it is set right and pressing in the piston fully or properly? (IMG:style_emoticons/default/idea.gif) Good question (IMG:style_emoticons/default/agree.gif) . |
malcolm2 |
Mar 28 2014, 11:13 AM
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#9
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
OK, sounds good. Last question; can the rod be adjusted when both MC and pedal cluster are installed ? I would think that that is the only way. It does require body twisting and some foul language, maybe a mirror and a bright light. Wedge yourself under the steering wheel and do it! If my memory serves me, that is how I did it. (IMG:style_emoticons/default/piratenanner.gif) |
malcolm2 |
Mar 28 2014, 11:15 AM
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#10
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
how do i know it is set right and pressing in the piston fully or properly? (IMG:style_emoticons/default/idea.gif) reach down and pull the pedal up. Should move just a smidge, am I right? |
jim_hoyland |
Mar 28 2014, 12:30 PM
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#11
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Get that VIN ? Group: Members Posts: 9,302 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California |
Yup . Moved about 1/4 inch and I can see the adjustment and lock nuts.
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