I just picked up a 42-2FG15 lift and I'm trying to diagnose some brake problems. There's a component in the brake system I can't identify and I'm wondering if any of you guys know what it is.

It's under the foot plate on the left side; a line comes from the brake master cylinder into the top of it, then another line comes out the side and is split between the wheel cylinders. It's got a bleeder screw, and it's also got two lines that come off it and go into the transmission.

Can anyone help me figure out what this thing is called and what it does?

Thanks,

Isaac