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Reply to "Distribution block rebuild"

Just ensure the piston is centered on installation otherwise one system ( front or rear ) will not fully function properly. If there is continuity in the rear brake warning switch terminals it is not centered.

Can I just add if you have the other pressure modulating valve out or have replaced it with another new unit  put it in the vice before you install it and ensure that the very large nut ( 1 3/8 inch ? ) on the end is sufficiently torqued. I installed a rebuilt one and had no end of trouble with a slow seepage from the bottom of the end cap.

This finally required removal to tighten sufficiently which meant a restart on system bleeding etc.  Destiny was to do it all twice ....!

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