Hard brake problems
Thread Starter
Heel & Toe
Joined: Aug 2007
Posts: 20
Likes: 0
From: Pickering Ontario
Hard brake problems
I have just installed a new brakes, master cylinder and brake booster on my 72 and I have to jump on the brakes to get it to stop, the pedal is very hard. Is this a common issue. Any suggestions as to why the pedal is so hard?
Intermediate
Joined: May 2007
Posts: 28
Likes: 0
From: Bakersfield California
Sounds like a power booster issue. Make sure the vacume line is connected-try the brakes, then take it off and see if there is any difference. There should be a big difference with it connected. It may be a good time to check the condition of your vacume lines as well.
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Did you get year specific booster and master?
Thread Starter
Heel & Toe
Joined: Aug 2007
Posts: 20
Likes: 0
From: Pickering Ontario
I have checked the vaccum to the booster and it is working fine.
The booster and M/C are not year specific but they are brand spanking new. What would cause the problem if they were not year specific?
The booster and M/C are not year specific but they are brand spanking new. What would cause the problem if they were not year specific?
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Well, pre-'77 the master and booster had a short snout mating design and the post-'77 master and booster had a long snout mating design.
If one is used with the other from a different system you end up with too much pressure from the pin or not enough. The two need to be matched correctly or it'll never work.
Thread Starter
Heel & Toe
Joined: Aug 2007
Posts: 20
Likes: 0
From: Pickering Ontario
I have another question re the matching of the booster and M/C.
We matched up the depth of the bore to the length of the rod in the booster before matching the 2 of them together.
Is there a way to identify the difference in the length of snout? How can I tell?
We matched up the depth of the bore to the length of the rod in the booster before matching the 2 of them together.
Is there a way to identify the difference in the length of snout? How can I tell?
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