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Campy
Samba Member
Joined: January 10, 2005
Posts: 4933
Location: Chico, CA
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 Posted: Wed Sep 17, 2014 9:04 pm Post subject: Chinese brake shoes |
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I have rebuilt bus brake systems plenty of times over the last 25 years and the brakes always worked good. The shop/garage that I go to stopped being able to get brake shoes that were re-lined (the type that I always used) some years ago. They now stock only new brake shoes that are made in China. The owner said that there has been no problem with them, but I totally rebuilt my buses brake system, the other day, including installing a new master cylinder, bled the shit out of it, and the brakes noticeably have less stopping power.
Has anyone had good luck with these brake shoes and who sells better brake shoes?
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Don't worry; be happy. (Baba) |
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kombisutra
Samba Member
Joined: October 02, 2003
Posts: 4127
Location: San Anselmo, 10 miles North Of San Francisco
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| Posted: Wed Sep 17, 2014 10:12 pm Post subject: |
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Appreciate your attention to originality. In my experience, I have been unable to achieve solid, symmetrical braking out of new shoes (or new to the drums) until they have been significantly burned-in. After I install a new set of shoes, I burn em' in until they smoke, then adjust em' and burn em' in again. I highly doubt that the materials used -even in China- as brake science evolves, could be noticeably less effective.
As a rule, I stockpile and reuse almost 100% of clean, low-use old shoes, and have never had even one lining come off.
Have faith, and stomp the hell out of that brake! Burn them suckers in! |
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sled
Samba Member
Joined: February 16, 2005
Posts: 6179
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| Posted: Wed Sep 17, 2014 10:30 pm Post subject: |
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are you having the shoes professionally arc'd to match the drums? If not then this is a significant part of your issue.
having shoes arc'd to drums is always ideal, whereas trying to let them wear in to shape can cause other issues, such as overheating small areas of the shoe and potentially glazing the shoe material.
finding a good shop to arc shoes is tough but worth it (they should be able to turn your drums at the same time)
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drive your split. |
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kombisutra
Samba Member
Joined: October 02, 2003
Posts: 4127
Location: San Anselmo, 10 miles North Of San Francisco
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| Posted: Wed Sep 17, 2014 10:36 pm Post subject: |
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| sled wrote: |
having shoes arc'd to drums is always ideal... finding a good shop to arc shoes is tough but worth it (they should be able to turn your drums at the same time) |
X2. |
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Campy
Samba Member
Joined: January 10, 2005
Posts: 4933
Location: Chico, CA
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| Posted: Thu Sep 18, 2014 2:37 am Post subject: |
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Going back 15 or more years, I was not able to find anyone who would arc brake shoes (breathing dust from asbestos linings had been a problem, but asbestos is no longer used) . A mechanic told me that brake shoes are designed to fit in brake drums that have not been turned, so it is harder to break them in when the drums have been turned and have a bigger arc. As I noted earlier, the old style re-lined brake shoes that I bought over the years always worked fine from the get go. The front and rear shoes that I removed went into the garbage container. I wish that I had kept them and cleaned them up, but that is hindsight.
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EverettB 
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Joined: April 11, 2000
Posts: 69804
Location: Phoenix Metro
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ToolBox
Samba Member
Joined: January 27, 2004
Posts: 3439
Location: Detroit, where they don't jack parts off my ride in the parking lot of the 7-11
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