OK, I'm a newb but I've never seen this connection before on the caliper. I'm about to replace the rotors, calipers and pads. Before I brake (no pun intended) the line loose is there anything special I need to know about reconnecting it. I have the Hayne's manual for this truck (2015 F150 King Ranch) but it doesn't address this connection. Will it simply reseat itself as the banjo bolt is tightened?

 

Not positive but I think it's a dry hole. It just keeps the fitting from turning so that you don't have to put pressure on the hose. It also sets the direction of the hose.

 

I think you're right. I looked inside the hole on the new caliper and it doesn't appear to lead into the caliper. Just a recess in the metal. Just wanna be sure before I take a wrench to it... Long walk to the store while the truck's on jackstands.

 

Look at the third picture here.

https://www.oreillyauto.com/detail/b...rd/f-150?pos=1

 

A definitive answer! Thanks, buddy! You rock!

 

Yeah, that's a typical banjo fitting with a locator tab. They used to use a square block that keyed into the caliper, but the tab method is probably less costly to produce.

 

Roger that. I expected to see the square block and when I saw this I thought, "Huh?"

 

I know, at first glance it looks like some kind of return/bypass line or something.

 

It does, yes. But as I thought about I thought, what in the wide, wide world of sports could the function possibly be? I mean, it's simple hydraulics: pressure in, pressure out. Then I thought, some sort of mod to the ABS? Nah! Anyway, glad it turned out to be simple.