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Unread 06-21-2009, 04:33 PM   #1
XJER
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1999 XJ Cherokee 
 
Join Date: Feb 2007
Location: Littleton, CO
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Yikes...Power steering fluid in brake system

I know, dumb, but I accidently put power steering fluid in the brake system. Only about 1 ounce or so, but it was driven like that for about a week and now the pedal goes nearly to the floor with reduced braking. Brake light is of course on. I flushed and bleed the entire sytem with at least 2 quarts of new brake fluid, but no improvement. I think I know I am in trouble. Is this just a M/C issue, or am I looking at hoses and caliper replacement. Idiot mistake....was in a hurry and was just topping it off before a long trip. Thanks for any advice.

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Unread 06-21-2009, 08:40 PM   #2
bikedude189
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well, i'm guessing that if it suddenly failed, power steering fluid eats rubber... at least M/C seal rubber. pull it apart and rebuild your master, pretty cheap. take a look at your flex lines while its off, and see if any fragments come out of them. try bleeding them again, take a large syringe and pump the fluid from the calipers through to the master. this is how bicycle brakes are bled and its the easiest and best method i've found for the heep too, it pushed bubbles UP instead of down...

good luck!
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Unread 06-21-2009, 09:45 PM   #3
AZ Jeff
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Quote:
Originally Posted by bikedude189 View Post
well, i'm guessing that if it suddenly failed, power steering fluid eats rubber... at least M/C seal rubber. pull it apart and rebuild your master, pretty cheap. take a look at your flex lines while its off, and see if any fragments come out of them. try bleeding them again, take a large syringe and pump the fluid from the calipers through to the master. this is how bicycle brakes are bled and its the easiest and best method i've found for the heep too, it pushed bubbles UP instead of down...

good luck!
Actually, you will need to replace ALL THE RUBBER PARTS in the ENTIRE BRAKE SYSTEM, as NONE OF THEM are tolerant of power steering fluid, which is a type of OIL.

Brake fluid is a type of ALCOHOL, and thus rubber parts in brake systems are geared around being tolerant of that type of chemical.

You will need:

1. new rear wheel cylinders (or seal kits for them)
2. new front calipers (or seal kits for them)
3. a new master cylinder (or a seal kit for it)
4 new front brake hoses
5. a new rear brake hose

Finding seal kits is problematic nowadays, since no one rebuilds calipers or wheel cylinders themselves (it's more cost effective to just buy reman'd ones)

Good luck on your overhaul. I am betting you will NEVER make that simple, but critical, mistake again.
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Unread 06-22-2009, 11:25 AM   #4
XJER
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Yep, that is what I thought. Guess it is a good time to hit the junk yard for some used parts and go to the stainless steel lines.....me so dumb.

Thanks for the replies.
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Unread 06-22-2009, 12:33 PM   #5
CharlieMopps
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Rebuilt Calipers are $13 each at autozone
Rebuild the master cylinder. That kits cheap as well.
you should have extended stainless breaklines by now anyways. Go get them.
And lastly, Ford 8.8 out of a ford explorer: $200 and it has Disc breaks! (but you'll need a welder)
Ok, if you don't have a welder, get rear cylinders while you're at autozone. I dunno how much those cost.

I think this is the perfect excuse to slip an axle upgrade by the wife. "My breaks failed! It's going to cost $200 to fix. Sorry hunny!"
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Unread 06-22-2009, 11:51 PM   #6
bikedude189
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i think you should be able to get all the seal kits and lines at q'tec. if not then scrounge your local parts stores/internets. go green! rebuild, not replace!
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