Brake portioning valve diagram - Defender Source
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  #1  
Old May 14th, 2013, 10:17 AM
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Brian Kandefer
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Brake portioning valve diagram

Trying to trouble shoot my brake issues, does anyone have a diagram for the portioning valve that is on the RH side bulkhead?
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  #2  
Old May 14th, 2013, 11:22 AM
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This may help. No diagram though.
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Old May 14th, 2013, 12:04 PM
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Quote:
Originally Posted by JSBriggs View Post
-Jeff
Perfect thanks
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  #4  
Old May 16th, 2013, 09:52 AM
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Quote:
Originally Posted by JSBriggs View Post
-Jeff
Anyone know why a 90 has the proportioning valve and the 110/130's don't?
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  #5  
Old May 16th, 2013, 10:17 AM
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Quote:
Originally Posted by tomaco1 View Post
Anyone know why a 90 has the proportioning valve and the 110/130's don't?
Just guessing, but less weight over the rear?
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  #6  
Old May 16th, 2013, 11:31 AM
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They used a different master cylinder
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  #7  
Old May 16th, 2013, 11:34 AM
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Quote:
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They used a different master cylinder
No. The 110 has drum brakes in the rear.
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Old May 16th, 2013, 11:53 AM
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the diagram shows 4 wheel discs on the 110
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  #9  
Old May 16th, 2013, 11:57 AM
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Quote:
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the diagram shows 4 wheel discs on the 110
I stand corrected but I will say on NAS trucks the master cylinders appear to be the exact same one.
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  #10  
Old May 16th, 2013, 12:01 PM
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The master on all NAS trucks is the same right? I'm just trying to figure out if I should go the NAS route like the diagram or the route of the older ROW trucks like your first pic in this thread
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  #11  
Old May 16th, 2013, 02:47 PM
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I see servo's and brake master's on RN which are anti lock
And non anti lock, anyone know the difference?
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