need help with brake booster measurement
 

Hey guys, I’m about to go ballistic
I cant figure out which piece is wrong, is the brake booster the wrong one or are these brackets too short. I think its the brackets. I figure the correct ones should be about 5" long
Of coarse keeping with my history of being a retard I didn’t bother fitting the parts till after all the prep and paintwork was done.
Ohhhhh I forgot to mention this is a 71

Re: need help with brake booster measurement
 

best picture i could find for yal doing a google seach sorry for useing someone esles picture if its anyones on here

Re: need help with brake booster measurement
 

3/4 ton correct? Are those the brackets you had on it before painting?

Re: need help with brake booster measurement
 

uncle
1971 1/2 ton. That pic of all those boosters is not mine.
I don’t have the original one. That’s where my confusion is, if I have the right bracket or not.

truckdude239
Thanks for digging for that pic. What I really need is a measurement of the bracket. The one I have is 3 1/2"

Re: need help with brake booster measurement
 

I'll try to get you 1 tomorrow.

Re: need help with brake booster measurement
 

This is a 11" booster from a 3/4 ton , the bracket is 5 and 1/8 inches. Puts the master cyl pointing slightly down.
John

Re: need help with brake booster measurement
 

Thanks John

Does anyone with a 1/2 ton get the same measurement as John?

I went to a diffrent parts store just to check if the booster was wrong ...... looked at one from a diffrent rebuilder and it was the same as mine.

I know there are delco and bendix boosters but I was told it only effects the master cyl. In other words a delco master must be used with a delco booster.

Re: need help with brake booster measurement
 

glad I'm not the only one having problems with the brake booster.
hope to have mine done after this big snow storm leaves town...............
Thanks to those who responded to my Q's and helped out.

Re: need help with brake booster measurement
 

this on a 72 1/2t gmc I have and one on have on the shelf. close as I can tell looks to be 5 3/4" long.

Re: need help with brake booster measurement
 

Jamis - Looks like you have a 3/4T booster with 1/2T brackets. I have both sets of brackets and they are about 2 inches different where you measured. As mentioned above the 3/4T brackets place the MC at a slight downward angle.

Re: need help with brake booster measurement
 

1967-70 trucks with drum brakes use Bendix boosters, and 71-72 trucks with disc brakes use Delco-Morane boosters. The brackets are different between Bendix and Delco boosters.

Re: need help with brake booster measurement
 

The mystery has been solved.
These brackets are for a 67 drum/drum booster setup.
Thanks for all your help..... :)

Re: need help with brake booster measurement
 

Nice paint job on the booster and bracket however......