[Early_S_Man]

Wavey,

As to question #1 ... 91% isopropyl alcohol or methanol would be an appropriate solvent to clean your hard brake lines with ... it will dissolve any remnants/clumps of old brake fluid/water/corrosion products left bhind when you drain the lines. I always use the following procedure when converting to DOT 5 silicone brake fluid, and have never had any problems with corrosion resulting from old brake fluid.

The procedure I use is to be sure the air supply has a moisture filter/separator on it:

1. Drain the lines first by blowing with low-pressure air [10 - 15 psi] ... until no more fluid drips out of line into large glass jar from clear vinyl tubing slipped over the double-flare nipple.

2. Feed alcohol through lines with large 50 cc syringe [available at agricultural feed/supply store] with clear vinyl hose attached. Feed enough alcohol to assure that clear, clean alcohol is running out the hard line. This can take a few minutes with the long line through the tunnel!

3. Blow out lines for at least five minutes with dry air at 50 - 60 psi. Repeat after 15 minute 'sitting' time.