Bleeding Master Cylinders for Budd Brakes

All the info below is related to the 1967 Imperial and Chrysler FSM. I got my master cylinder from PST last weekend, and I'm hoping to put it on this weekend. A couple of things:

1) Previously, I hadn't seen the separate trouble-shooting section in the Budd brakes part of "Brakes." I only saw the one in the front of the chapter. One of the symptoms is "Front Brakes Heat up During Driving and Fail to Release."

One possible cause is Residual pressure valve in master cylinder.

The fix says, "Remove valve. (See Fig. 15)." Unfortunately there is no Fig. 15. I've bought the MC, so I'm not likely to return it, but... anyone have an idea here? Note that this is on 5-29. It's possible that it's a typo, and they're referring to Fig 3 on 5-36, but that doesn't really solve the issue.

2) (and this is really getting to the point) On P 5-37, under "Bleeding the Master Cylinder," the instruction reads, "Clamp master cylinder in a vice and attach bleeding tubes Tool C-4029 (Fig 7). Be sure that a residual pressure valve is on end of tube in large capacity resivoir. (This keeps brake fluid from being syphoned out of reservoir during bleeding operation.)"

Huh? If the tubes go to a level lower than the brake fluid, how would it siphon out (never mind their odd spelling of "siphon").

Anything to this? Anything to be worried about, or just go ahead and make my bleeding tubes and get on with it?

Pic grabbed from manual for reference.

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Author: bajajoaquin