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71 Hemi P/B question #2819113
09/09/20 08:50 PM
09/09/20 08:50 PM
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Transman Offline OP
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Trying to figure out how to disassemble the P/B bracket/pivot assembly on a 1971 Hemi GTX.

The parts book shows all the pieces independent of each other so that should mean you have to assemble it in the field but I cannot get the large pivot pin with the square head to break free, shown on the far left in the image below.

I even tried to press it out and stopped before I screwed it up. Used heat too. Next is to soak it in PB blaster and see if that frees things up.


Am I missing something ?


6F293C64-145A-4425-B6B5-60989C270E66.jpeg
Last edited by Transman; 09/09/20 08:58 PM.
Re: 71 Hemi P/B question [Re: Transman] #2819120
09/09/20 09:09 PM
09/09/20 09:09 PM
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That pivot shaft is notorious for seizing up. You should be able to get the side bracket on the side opposite from the square head off with little trouble. The problem is the shaft seizing on the center sleeve. Heat, penetrating oil, and patience can work most of the time but I've talked to people that had to drill it out.


Wife says too many cars, liquidation coming soon......
Re: 71 Hemi P/B question [Re: 6PakBee] #2819148
09/09/20 10:18 PM
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heat is the most realistic , have done several . dont use a torch .use Nap gas on burns o matic spreads the heat.

Re: 71 Hemi P/B question [Re: Little Detroit] #2819166
09/10/20 01:52 AM
09/10/20 01:52 AM
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I did get the outside bracket off without any problems.

Was just making sure I wasn’t overlooking something.

I guess I’ll soak it while I work on other stuff.

Thanks for the info.

Re: 71 Hemi P/B question [Re: Transman] #2819196
09/10/20 07:32 AM
09/10/20 07:32 AM
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to take care of rust issues use evap o rust . . i put 3 gallions in a 5 gal bucket and let soak for 48 hours , pull out of bucket rinse off with water,dry with towel , and wala nice shinny metal no rust ,not even in any pitted areas. as far as the the pin that was frozen either bore out the hole in the sleeve or put a thin brass bushing in it , but to tell you the truth just lubing it real good should do the trick for next 50 years

Re: 71 Hemi P/B question [Re: Little Detroit] #2819208
09/10/20 08:16 AM
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Does center link pivot on the pin? Did some one spot weld the square end to the bracket?

Re: 71 Hemi P/B question [Re: dragon slayer] #2819293
09/10/20 11:41 AM
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Originally Posted by dragon slayer
Does center link pivot on the pin? Did some one spot weld the square end to the bracket?


That’s part of my concern - the pin is seized and there is limited travel for the pedal link and booster/master cylinder pushrod end.

I’m going to soak it and do other stuff, hopefully I don’t have to drill it out but will if I have to.

Re: 71 Hemi P/B question [Re: Transman] #2819415
09/10/20 04:44 PM
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I recently did 2 66ish assemblies. The center pin was stuck, not the square pin, though it was stiff. I had to press both out. You will see the spot weld if used. Used smallest diameter fitting the pin would pass through against the bracket. Pressed out. Once it popped it came out on low pressure.

Re: 71 Hemi P/B question [Re: dragon slayer] #2819423
09/10/20 05:05 PM
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Originally Posted by dragon slayer
I recently did 2 66ish assemblies. The center pin was stuck, not the square pin, though it was stiff. I had to press both out. You will see the spot weld if used. Used smallest diameter fitting the pin would pass through against the bracket. Pressed out. Once it popped it came out on low pressure.


The center pin is free, the sqaure head pin is seized in the two moveable pivot brackets.

Hope that makes sense.

Re: 71 Hemi P/B question [Re: Transman] #2819847
09/11/20 09:42 PM
09/11/20 09:42 PM
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Originally Posted by Transman
Originally Posted by dragon slayer
I recently did 2 66ish assemblies. The center pin was stuck, not the square pin, though it was stiff. I had to press both out. You will see the spot weld if used. Used smallest diameter fitting the pin would pass through against the bracket. Pressed out. Once it popped it came out on low pressure.


The center pin is free, the sqaure head pin is seized in the two moveable pivot brackets.

Hope that makes sense.


up Yup, makes sense. I haven't done a lot of these and maybe I'm just lucky but the lower shaft that goes through the side brackets (the square headed shaft) has always been the frozen one.


Wife says too many cars, liquidation coming soon......
Re: 71 Hemi P/B question [Re: 6PakBee] #2820005
09/12/20 02:40 PM
09/12/20 02:40 PM
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Originally Posted by 6PakBee
Originally Posted by Transman
Originally Posted by dragon slayer
I recently did 2 66ish assemblies. The center pin was stuck, not the square pin, though it was stiff. I had to press both out. You will see the spot weld if used. Used smallest diameter fitting the pin would pass through against the bracket. Pressed out. Once it popped it came out on low pressure.


The center pin is free, the sqaure head pin is seized in the two moveable pivot brackets.

Hope that makes sense.


up Yup, makes sense. I haven't done a lot of these and maybe I'm just lucky but the lower shaft that goes through the side brackets (the square headed shaft) has always been the frozen one.


Been soaking for a few days. Not even thinking of budging. Hit it with heat while it was in the press, nothing yet.

Going to wait until I get the booster back and if it’s still stuck it gets the grinder.

Re: 71 Hemi P/B question [Re: Transman] #2820091
09/12/20 08:09 PM
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what are you soaking it in??

Re: 71 Hemi P/B question [Re: Transman] #2820098
09/12/20 08:51 PM
09/12/20 08:51 PM
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Originally Posted by Transman
Been soaking for a few days. Not even thinking of budging. Hit it with heat while it was in the press, nothing yet.

Going to wait until I get the booster back and if it’s still stuck it gets the grinder.


Don't be afraid to put some heat to it. When I worked on the rear suspension of my '98 Neon, the control arm bolts were frozen in the knuckles. Took a LOT of heat while I was pressing them but they did come out.


Wife says too many cars, liquidation coming soon......
Re: 71 Hemi P/B question [Re: Little Detroit] #2820132
09/13/20 03:05 AM
09/13/20 03:05 AM
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Originally Posted by Little Detroit






what are you soaking it in??


Evaporust

Re: 71 Hemi P/B question [Re: Transman] #2820139
09/13/20 06:04 AM
09/13/20 06:04 AM
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Have you tried heating it to red hot and then quenching it in cold water? That’s my solution for really tough rust.

Last edited by fastmark; 09/13/20 06:05 AM.
Re: 71 Hemi P/B question [Re: fastmark] #2820169
09/13/20 08:44 AM
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Not red hot, going to see if the evaporust works first.







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