why bleed ford c2 power steering pumps with vacuum?

Answer 1

Think of the air as a seething mass of bouncing balls bouncing off a seething mass of bouncing balls with elastic straps tying them together (the liquid). The balls (molecules) in the air help keep most of the balls (molecules) in the liquid from flying off if they happen to break their bonds (elastic straps) with eachother. (When the atoms do occasionally break the bonds and escape, they create a trace amount of vapor which occurs well below the boiling point of the substance, and that's why we can smell solids and liquids even though they seem to be staying in solid or liquid form.) If you take away half the balls (atoms) in the air, (applying a vacuum), the balls (atoms) in the liquid have a better chance of escaping. This also goes for any dissolved gas trapped in the liquid. What may have been atoms of air invisibly squeezed between the molecules of liquid now exert a greater force upon the surrounding liquid and form bubbles. (Like in a freshly opened soda, or in the blood of a diver who comes up from the deep too fast, which creates a condition known as The Bends.) In the same way, any bubbles or air pockets that already exsist will expand and force thier way out of the power steering fluid more readily. Then, when you remove the vacuum, any air that is left will be forced to contract into bubbles that are very much smaller than what you had before, or be completely dissolved under the greater pressure.

Answer 2

I like the technical answer the best but from Ford's idea here is the easy skinny.. it's the only way to get all air bubbles trapped in the system out that can cause power steering noise... proven fact...

Answer 3

I by no potential heard of changing oil in a potential steerage pump with a vacuum pump. If it grow to be me i might in basic terms drain the oil by taking the hose off the steerage kit and enable it drain right into a pan and replenish the pump reservoir. once you turn the steerage wheel if there is any air it extremely is going to come out.

Answer 4

The main reason to bleed p/s pumps is to remove dirty, contaminated fluid.

The vacuum method happens to be one of the ways of doing it.

Answer 5

Because pressurizing the reservoir will blow the Orings in the case.

Answer 6

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