Tech- Give yourself a brake

See, I said brake, because I'm talking about hydraulic brake systems, not giving yourself a break, as in: "to relax"...so brake here is the...um, that is, it's like a different meaning than the ah.....(sound of crickets chirping)......ooooo-kay.
Sorry for the late post, HRitHV fans, I got a one-time side job this week, so I had to take it.
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This is EV-Steve's S10 EV conversion, an '85 model that's been laid up a while. He asked me to go through the brake system and get it up to snuff. The 3 large white boxes contain some of the batteries that power the truck. He runs 120 volts now; 20 6-volt batteries.
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His truck needed some brake parts replaced, and some hard lines replaced as well. The hard lines get rusty eventually and leak. Replacing hard lines on an assembled vehicle can be a challenge. It's part tough work, and part art form, really. The factory puts them on way before anything else is in the way; actually before the body is on the frame. The ones for this truck were relatively easy, because the whole bed tilts up as shown. Nice.
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You can get hard lines at any auto parts store, they look like this, if your eyesight is bad:
They come in 10-inch incremental lengths, and there are coupling nuts to make really long runs. The nice thing is they already have "double flared" ends on them. You need double flared ends to withstand the pressure in a hydraulic brake system. This pressure can average 2000 psi.
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Here are some of the lines I did on EV-Steve's truck. You can see the sweeping bends and how you must go around obstacles. The brake hose is new as well. The whole system must be good to work properly.

To make the lines really nicey-nice, you sometimes have to shorten the length to make them fit well. If you doubt your abilities, you can just make a sweeping loop with the extra length. This way you don't have to make a new double flared end after cutting, which requires special tools and some experience, or at least practice. If you make a leaky new end, you are no better off than before.

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I personally could not bear having the too-long lines on there. In my view it is bad workmanship and therfore unacceptable. I was not satisfied with the look of the lines I did, so I cut them shorter, and made new double flared ends. Now they are the correct length, and they look great and function perfectly.

Sometimes the fittings will leak. This is especially prone to happen on any double flared ends you make. Get out your line-wrench (you do remember I taught you about these special wrenches, right?) and give the fitting a good tightening. There. Still leaks don't it? Frustrating. No no no, don't just crank on it more, you'll strip it!!! Jeez. You want to make another flare, but then the line will be too short, huh? Forget that.

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Here's the tricky-trick secret to all of this (aren't you glad you stuck around for the tricky-trick secret? I knew you would be): Loosen the fitting, then tighten it again. Repeat. Repeat again. Notice that every time, the fitting will tighten a little more than before, with less effort. This is the flare bedding in. Keep doing this until the leak stops. Yes, it will.

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Now just bleed the brakes, and stop confidently and safely.

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I have a good carburetor story from the F100 coming up. Hopefully we can get that running soon. Thanks for tuning in.

Removed the ABS valve thing

Here are the brake parts still attached to the chassis. The ABS valve is on the left, master cylinder is in the middle, and power booster on the right. The power booster is what gives you "power" brakes. I'll be removing and discarding the ABS valve. I made a quick sketch of where each line goes from the ABS valve. I don't know why I did this, as I will not be reusing it and will not need this information. Old habit I guess. I make a lot of sketches and notes as I take a vehicle apart. Can't hurt.

No, the car in the background is not falling off a cliff, the picture is a little tilted.

Here I am about to loosen the lines from the ABS module. For disassembling any type of tube fitting, you should use a Line Wrench. This is like an open end wrench, but it wraps farther around the fitting for better grip. Look at how it wraps 3/4 of the way around the fitting instead of 1/2 way like an open end wrench would. This is 2 extra points of the hex it grabs. That matters. This wrench is less likely to slip and strip the hex, and it also prevents crushing the fitting, which can happen if you 'gorilla' them like I do. After you have broken them loose, you can switch to a regular open end wrench for faster work.

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Line wrenches come in a set of four or so. Get 'em. For every fitting you don't booger up, your brakes will thank you.

Here is the ABS valve, sittin' in the pan like a big fat ripe appendix. I wish I had dumped it at the scrapper, it's got to weigh 20 lbs (the valve, not my appendix). Is this really necessary? Do people really not know how to stop a car to the degree that this thing has to be on there? You should have seen the amount of wiring that was attached to this thing too. Pathetic and ridiculous. Pump and steer, people, pump and steer. Sounds like an ale and steak house, the Pump and Steer.

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I was considering putting in a combination valve from an earlier model S10 where the ABS valve was. But I am thinking that the brake bias will be permanently different than a stock truck. The estimated 1500 lb battery load will see to that. I think a simple solution will be to put a proportioning valve like that used on race cars on it. All you do is hook up the brakes, front and rears separated, and do a panic stop. Note whether the front or rear wheels lock up (go into a skid) first. Usually it will be the rears, but with the rear load this truck will have, it may be the fronts. Install the proportioning valve in the set that locks up first, and close the valve a little. This restricts the amount of fluid that can pass, delaying that set of brakes from locking up, until they all do at once or more nearly at once. Get it?

Here are the parts we will be reusing, the master cylinder and power booster. Now sitting on the previously mentioned small pile of parts. I believe that is the sun visors it is dripping on there.

A small task, but I have done enough ambitious projects to know that you get them done the way you eat an elephant: One little bite at a time. Plus now you know what a Line Wrench is.

Now I'm hungry.