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  #1  
Old October 2nd, 2009, 09:25 AM
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brake booster?

I'm at the point where I want to swap my axles to Disco discs.
My question is whether I need to get a new Brake master cyclinder for the rear disc brakes?
I know I need the proportioning valve, but will the Master work?

I was told the disco master cyclinder would work, but both the Boosters I have(one from my1985 and another I got from Dale from a late model truck) have the bolts for the booster perfectly horizontal.

On the disco master they are a bit off horizontal. like 11 oclock and four oclock

What are my options?
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  #2  
Old October 2nd, 2009, 11:01 AM
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Jamie Austin
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No, just roll the disc brake axle under and bolt it up. no other bits are needed, the standard booster ("servo" here in correct-speaking-land ).

It's a very popular modification here, and the brakes are still up to the ministry test standards. too much boost and you can end up with the back end locking before the front (although i've never managed that myself!)
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Old October 2nd, 2009, 12:14 PM
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So you don't even use the proportioning valve from the disco?
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  #4  
Old October 2nd, 2009, 04:15 PM
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Jamie Austin
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No.

some model defenders have the proportional valve, some don't, not exactly sure of the reasoning for them, but just hooking up the disco axle to the original drum braked pipes and booster works fine... certainly better than the drum braked set-up.
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