Just rebuilt & installed original brake wheel cylinder on Series V (self adjusting) brakes on left side following WSM then oops noticed a spring sitting on the bench. It's not shown in WSM or SS catalog Looking at the right side parts not installed yet it looks like the only place it could go is behind the seal between the piston and the closed end of the bore. It's a fairly wimpy spring 1 ½ inch long 5/16 on one end and ⅜ on the other end. Hard to believe it could do much considering the friction between piston seal and bore but I guess I should use them. Is anyone familiar with these springs and can confirm I'm correct about where they fit.