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Username Post: Adding a brake booster        (Topic#363311)
chopr1 
"2nd Year" Gold Supporting Member
Posts: 44
chopr1
Age: 73
Reg: 01-11-19
11-16-20 05:12 PM - Post#2807897    

I'm in need of some expertise from you fellows. I'm installing a 9" stock brake booster to my 283-65 SS. I'm leaving the single master cylinder for on for now. The booster came with the rods to match up to what I have. The master cylinder to booster rod is right on. But installing the unit in the car (bolt holes were good, did have to adjust some dimensions, but have seen that on here before so no suprises) now the pedal rod matched to the old for length required the clevis to be clear forward, which JUST matches the old. Installed in the car the clevis hits right in the center to the two holes in the brake pedal. Instructions say to use lower hole with a booster, top hole with out. With the clevis clear forward the rod hits the brake arm and I don't want to force the rod up or down. Which hole does the clevis go in, and am I missing something on the rod not lining up with either hole.



 


Oshawa65SS 
Frequent Contributor
Posts: 1016

Age: 60
Loc: Burnaby BC Canada
Reg: 09-22-14
11-16-20 06:53 PM - Post#2807903    
    In response to chopr1

According to the accessory installation manual, the clevis goes in the lower hole.
I'd say review the install steps in the manual to see if there's anything you overlooked starting on page 52 of the pdf document.
http://toms427impala.info/CT/65AccessoryManual .pdf


Ryan

65 Impala SS Evening Orchid convertible 283 2V with Powerglide and 10 bolt 3.08 open by PO, originally 3.36
Build date Dec. 21 '64 Oshawa


 
chopr1 
"2nd Year" Gold Supporting Member
Posts: 44
chopr1
Age: 73
Reg: 01-11-19
11-16-20 07:31 PM - Post#2807904    
    In response to Oshawa65SS

Thanks for the reply. That was tomorrows plan. Something I missed I
m sure. Measurements are precise so may have misread something.



 
mjc1 
Senior Member
Posts: 1686
mjc1
Loc: Burlington Ontario Canada
Reg: 09-15-04
11-16-20 08:37 PM - Post#2807909    
    In response to chopr1

Is your pushrod threaded? Should be?
If yes, you should be able to run the clevis out on the rod to meet the lower hole? Also, the pushrod can be cut at the threads if it protrudes so far as to hit the pedal arm. As long as it comes all the way through the clevis when at final adjustment.

66 pedal assembly with a 11" booster,


1967 Grande Parisienne 4DR HT
My Flickr page



 
chopr1 
"2nd Year" Gold Supporting Member
Posts: 44
chopr1
Age: 73
Reg: 01-11-19
11-16-20 09:36 PM - Post#2807911    
    In response to mjc1

That is my problem, the rod that came with the kit needed the clevis to be screwed clear down, then the rod protruded so far back it hits the pedal arm. That's what I figured, cut the rod off and I should be good. Thanks for the picture, worth a thousand words! Hopefully the second time will be the charm.



 
mjc1 
Senior Member
Posts: 1686
mjc1
Loc: Burlington Ontario Canada
Reg: 09-15-04
11-17-20 07:03 AM - Post#2807926    
    In response to chopr1

I had the exact same issue doing a 11" on my 65. Too much rod but also not enough thread. I had to thread the rod down to the boot and cut the excess thread.
Booster sitting on the bench, I clamped the rod with vice grips, with the grips end being held in a vice. Made a cover to keep chips out of the booster. It was easy measuring for me as I had the booster and pedal assembly on the bench. I made sure not to thread into where the boot would travel on the rod, just up to it with the boot sitting free (you can see that in the first image). Cheers.



1967 Grande Parisienne 4DR HT
My Flickr page



 
chopr1 
"2nd Year" Gold Supporting Member
Posts: 44
chopr1
Age: 73
Reg: 01-11-19
11-17-20 07:27 PM - Post#2807970    
    In response to mjc1

mjc1, Exactly what I have. Got the booster out today and with the measurements I had it turned out just like yours. Tomorrows project, so I appreciate the knowledge and pictures. I knew when I put it in but thought I could get away with it. NOT. Being older and doing it alone I just hated taking it back out. Not enough time to do it right the first time, but plenty of time to do it the second. thanks to all!!



 
mjc1 
Senior Member
Posts: 1686
mjc1
Loc: Burlington Ontario Canada
Reg: 09-15-04
11-17-20 08:55 PM - Post#2807978    
    In response to chopr1

"Not enough time to do it right the first time, but plenty of time to do it the second"

How true is that in our hobby!
Good luck with the project!

Mark

1967 Grande Parisienne 4DR HT
My Flickr page



 
chopr1 
"2nd Year" Gold Supporting Member
Posts: 44
chopr1
Age: 73
Reg: 01-11-19
11-20-20 10:49 PM - Post#2808206    
    In response to mjc1

Brake report! Threaded the rod down, cut off excess rod, installed clevis to CORRECT dimension. Brakes work perfect! Thanks guys for the replies. May be a small matter to you, but not for the man needing assistance.



 
bbcrtny 
Poster
Posts: 55

Reg: 07-01-10
11-21-20 08:53 AM - Post#2808237    
    In response to chopr1

Chopr1 where did you get your power booster Kit?



 
chopr1 
"2nd Year" Gold Supporting Member
Posts: 44
chopr1
Age: 73
Reg: 01-11-19
11-21-20 02:12 PM - Post#2808274    
    In response to bbcrtny

Inline tube. Call and tell them what its for (1965 chevy impala) and they will have the right rod length (booster to master cylinder) and right rod and clevis for pedal. That being said, about like all mods. that are suppose to fit, mods. have to be made. Minor, bottom two bolt holes on car have to be elongated in about 5/16 inch to the inside. Rod to pedal, clevis has to be screwed clear down and excess rod cut off in clevis. AND it goes in the bottom hole on the pedal arm. Measure length close for length and it will work great. Maybe others on the site have better places to get this, but it works fine and is good quality. Don't forget vacuum hose and valve to go in the booster. Around $150.00 all told.



 
bbcrtny 
Poster
Posts: 55

Reg: 07-01-10
11-22-20 07:54 AM - Post#2808321    
    In response to chopr1

Chopr1, thanks for the information.



 
bigbowtielover 
Valued Contributor
Posts: 2626
bigbowtielover
Loc: Surrey British Columbia
Reg: 09-01-13
11-22-20 11:06 PM - Post#2808379    
    In response to chopr1

Sounds like the booster is '67 and later design due to having to modify the mounting holes. I had a '65 that previous owner put a '67 brake booster and entire brake system on it. When i removed the booster i noticed the holes were drilled and filed out to make it fit(it looked very roughly done). I had a second car that was changed to '67 booster and on that one the holes were drilled oversized and they used flat washers on inside under the nuts.



 


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