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            A Tool That Takes "Pump 'Em Up" Out of the Garage
                                             Text and lmages By Josh Bolger

                                                  Motive Products
                                                    2326 5th Street
                                               Berkeley, California 947 10

 I f you  have ever had to bleed your        Bleeder cap. For earlier model cars, a          First remove the master cylinder cover and
 I  Mustang's brakes, you probably had to    plate and chains are used as a cap. The        install the Power Bleeder top on the master
 I ask a friend to come over and "pump       Power Bleeder forces fluid through your        cylinder. Motive supplies four'1" bolts, nuts
up" the brakes while you fumbled around      Mustang's brake system under pressure,         and washers, and two pieces of chain to strap
under the car with the bleeder valves. On                                                   it down.
                                             which means no air in the line.
a car with power-assisted brakes you             Motive sells most of their kits for less
would have to have the engine running        than $60. For our project they sent us
and then you would have to yell, "Pump       both the early model and late model
'em up" over the rumble of the dual          adapter caps, which added $20 to the
exhaust. No fun and not really the picture   total. So, if you have both early and late
of OHSA safety procedures either.            model cars you'll spend about $80. lf you
   Well, those days of begging help and      own a shop, Motive also makes a Power
yelling "pump 'em up" are over thanks to     Bleeder Magnum that comes with three
the folks at Motive Products and their       different adapters and a one-gallon tank.
handy little Power Bleeder. The Power        The Power Bleeder also works on
Bleeder is a simple two-quart polyethyl-     hydraulic clutches like those found on
ene tank with an integral pump and pres-     Ford Trucks.
sure gauge that connects to your                Follow along as we bleed the brakes
Mustang's master cylinder with a sup-        on a 1970 Mustang that needed a little
plied cap. For late model owners, the        help after sitting for an extended period. I   After you get it on, you'll need to test it dry by
Power Bleeder is extremely simple-just       "begged" my friend Billy Houston to help       pressurizing the Power Bleeder to 10psi-if
remove the cap and screw on the Power        out while I took the ohotos. jlt?'             there are no leaks you're good to go.

6O Mustang Times September 2OO4
                                                                                                        WHY YOU SHOULD FLUSH YOUR
                                                                               The Power Bleeder        BRAKE FLUID-OFTEN
                                                                               is supplied with a            The most common brake fluid found in a
                                                                               foot-long clear plas-    Mustang is DOT3. DOT3 and DOT4 and
                                                                               tic tube that will go    DOTS.1 are a polyalkylene glycol ether fluid
                                                                               over the bleeder         that is by nature hygroscopic. meaning that
                                                                               valve on most cars.      the fluid will absorb water or moisture.
                                                                               For our 1970
                                                                                                        Water in the braking system means that the
                                                                               Mustang, the bleed-
                                                                               er valves were to
                                                                                                        boiling point of the fluid is greatly reduced.
                                                                               big to easily fit the         As an example, the minimum boiling point
                                                                               tube over so we          standard for brake fluid, as defined by the
                                                                               used a piece of 9132-    Department of Transportation, for DOT3 is,
                                                                               inch vacuum line. (lt    401oF dry and2840 F wet. What is the differ-
                                                                               is better to use clear   ence between wet and dry boiling points?
                                                                               tubing to see the         Dry is defined as 0-percent water and wet as
                                                                               fluid as it comes
                                                                                                        3-percent. The Society of Automotive
                                                                               out,) We then used
                                                                               the empty brake           Engineers reports that most new cars that are
                                                                               fluid bottle as a        about one year old have water content of 2-
After the dry run we released the pressure                                     "catch can." We just      percent. With just 3-percent water content the
and added two quarts of new clean brake                                        drilled a hole in the     boiling point will be reduced 1170 F or 28-per-
fluid and pumped the Power Bleeder back up                                     cap and stuck the        cent. Plus as the water boils and turns to
to   1Oosi.                                                                    tube through,            steam air is introduced into the system. Why
                                                                                                         is this important to you? Because it can cause
                                                                                                         brake failure when you need to brakes
                                                                                                        most-in   a panic stop.
                                                                                                            Most brake systems contain a majority
                                                                                                        of steel products; the lines, calipers and or
                                                                                                        wheel cvlinders are almost all steel and
                                                                                                        iron. Water trapped in the brake system
                                                                                                        means that these parts are subject to rust.
                                                                                                        Water in the brake fluid will cause the pis-
                                                                                                        tons in calipers and wheel cylinders to
                                                                                                        stick, which most likely means replace-
                                                                                                        ment. For older cars that are not driven
                                                                                                        daily this is a serious concern because you
                                                                                                        don't want a brake failure to distract from
                                                                                                        your fun time-or worse.
You don't have to take the wheels off to bleed
                                                                                                            lf Vou want to use DOTS fluid which is sili-
the brakes, just slip the tube over the bleeder
                                                                                                        con based and hydrophobic or not prone to
valve then loosen the valve; the pressurized
fluid in the Power Bleeder does the rest-forc-                                                          absorb water-beware that silicon based
ing the old dirty fluid out. (Note: Consult a shop                                                      fluid is more compressible than polyalkylene
manual for the correct bleeding sequence for                                                             glycol ether fluids and may cause a spongy
your car. Generally you start at the wheel the                                                          feeling in your braking system. DOTS does
farthest away from the master cylinder. We did       On the opposite side of the car we removed          have a higher boiling point however, 500oF
not show the rear brakes, which we did first.)       the wheel to show how simple and clean it is.      dry and 356oF wet. DOT5.1 has an even
                                                                                                         higher boiling point, 518"F dry and 375oF
                                                                                                        wet but it is a polyalkylene glycol ether fluid.
                                                                                                            Annual flushing of the brake fluid is one
                                                                                                        way to minimize the possibility of corrosion,
                                                                                                        just add it to your list of maintenance like oil
                                                                                                        changes. lfyou change your oil every three
                                                                                                        months or 3,000 miles, just add "Flush Brake
                                                                                                        Fluid" to your maintenance schedule every
                                                                                                        fourth oil change or once a vear.
                                                                                                           More and more MCA members are dis-
                                                                                                        covering the thrill of open track events. High-
                                                                                                        spirited driving pushes the limits of contami-
                                                                                                        nated brake fluid to its limits. From oersonal
                                                                                                        experience, I highly recommend anyone
                                                                                                        planning to pafiicipate in an open track
                                                                                                        event flush their Mustang's brake fluid
                                                                                                        before going to the track. Bad fluid will fail
                                                     For late model cars it is even easier, just        and without much warning. lf you pull a trail-
                                                     remove the factory cap and install the Power       eL don't forget your truck's brake fluid either.
All done, New. clean. clear fluid is now in the      Bleeder cap, then bleed the brakes in              Better to be safe than sorry.
system-ready for another year.                       sequence as specified by the factory manual.                                           Josh Bolger

62 Mustang Times September 2OO4

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