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Old 12-20-2002, 10:57 AM
Tazz
 
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Cool brake bleeding with a vacume pump

Lets talk. The vacume pump draws fluid to the jar and the pedal is hard as heck, Did I say the pedal was hard? New front disc setup, new mastercylinder, new lines and fluid. Didn't get the bleeders/screw in plastic things with the little hose on it to bleed the mastercylinder. Bleed the system and the mastercylinder is ROCK hard? HELP!!

Todd <img src="confused.gif" border="0">

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Old 12-20-2002, 12:55 PM
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Since you didn't bench bleed the master cylinder, here is an option for you. Disconnect the lines from the master cylinder. Be sure the reservor is full. Slowly depress the pedal about 3/4 of the total travel & release the pedal. Do NOT bottom out the piston in the master cylinder. Repeat this until just fluid is coming out the outlets on the master cylinder. Do NOT let the brake fluid get too low. Re-connect the brake lines and refill the master cylinder. You should now be able to bleed the system. There will still be some air in the master cylinder doing it this way. Some of the air can be gotten out after the lines are re-connected by pumping the pedal several times and holding it down while a helper loosens the brake line fitting(s) at the master cylinder and then tightening them back up. Do NOT release the pedal until the fittings have been re-tightened or you will suck air back into the system.
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Old 12-20-2002, 01:28 PM
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I'm confused? What do you mean by rock hard? When there's air in the system the pedal is usually low and soft feeling. The whole point of bleeding brakes is to bleed the air out til you get a nice hard pedal when you step on it. The booster is what 'softens' the feel of the pedal for easier driving.
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Old 12-20-2002, 01:58 PM
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Do you have a power brake booster?
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Old 12-20-2002, 03:55 PM
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Rock hard, like standing on a very hard surface, no movement in pedal at all just a hard pedal. No the brakes are standard and not power. I wonder if something is stuck inside the mastercylinder/frozen up. I am going to loosen the lines to the mastercylinder and try bleed the air out with a friends help. He has the fittings with the little hoses so if that dosn't work I will remove this mastercylinder and try and bench bleed it. I should be able to depress the cylinder by hand.


Todd <img src="confused.gif" border="0">

[ December 20, 2002: Message edited by: tm454 ]</p>
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Old 12-20-2002, 07:17 PM
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If you have the master cylinder bleed kit, you don't have to remove the master cylinder. Just remove the lines and bleed it on the car.

<a href="http://www.mpbrakes.com/mpfaqmasters.htm" target="_blank">-Master Cylinder Information-</a>

[quote]I have manual brakes and I have an extremely hard pedal. Why?

Check the bore size of your master. If it is larger than 1" then you will have a very hard pedal.<hr></blockquote>

[quote]What bore size do you need for manual brakes?

If you use anything larger than 1" then you will have an extremely hard pedal.The smaller the bore the more pressure that is output to the wheels.<hr></blockquote>

[ December 21, 2002: Message edited by: KULTULZ ]</p>
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Old 12-26-2002, 05:32 AM
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Cool

Found I had installed the wrong Metering block. I installed the vl3359 and not the vl3350, makes a big difference.

Todd
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