Hydraulic brake adjustments.

[badassfrombadaxe]

I consulted the hydraulics section of Ford V8 Service Bulletins 1938-1940 Complete on it's pg 459 and it suggests that the free play in the pedal if made zero results in blocking the bypass port so fluid cannot get back into the reservoir. It also says this condition could come from the rubber swelling due to improper fluid mineral oil instead of alcohol or M3833 fluid in cleaning the parts. Did I spend wisely with Amazon to obtain this book or is it too far from the common man?