Bias valve

It's the 2 pins that supposed to go up n down but 1 of the pins not doing its job I've gone for mot and left side brake is low but right side is good I've taking it apart try n fix it but still no joy has anyone had problems on know how to bypass it?
 
Have you checked the wheel cylinder is free? And working?,

And if you want to bypass it just make up some joints and bridge the pipes bypassing it valve it's self but sounds you may want it check the wheel cylinder ect and adjustment

Sent from my moto g(6) using Micra Sports Club mobile app
 
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