Freebird Posted January 14, 2016 #1 Posted January 14, 2016 A big THANK YOU to Ed (Zzyzx) for this excellent tech article. Attached is the how to for repairing the proportioning valve on 1st gens I did to my newly acquired 83 over the weekend. 1st Gen Rear Brake Proportioning System Repair.pdf
Prairiehammer Posted January 14, 2016 #2 Posted January 14, 2016 (edited) Contributed by Prairiehammer. In the write-up, Ed cautions that the "brass center pipe" should not be removed for fear of damage. That part must be removed in order to clean and inspect the primary working part of the proportioning valve. There will be no damage done by removing the copper colored spindle. It simply slides into the bore of the proportioning valve. Attached to the spindle is a nitrile cup. This "rubber" cup is prone to damage or debris. Additionally, there is a constrictive port behind the cup that should be inspected and insured to be clear. Attached are pertinent photos I have taken when I disassembled my proportioning valve. [ATTACH=CONFIG]103059[/ATTACH][ATTACH=CONFIG]103060[/ATTACH][ATTACH=CONFIG]103061[/ATTACH][ATTACH=CONFIG]103062[/ATTACH][ATTACH=CONFIG]103063[/ATTACH] Edited January 14, 2016 by Freebird
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