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Old 09-08-2012, 03:38 PM   #1
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Big Mistake - need recommendations

Working on my TJ with the son today and got our fluids mixed up and placed PS Fluid in the Brake Reservoir. Jeep was started while looking at something else, but the brakes have not been used. Reservoir is already drained (within 5 minutes) but now I am not sure if I need to just replace the reservoir, the master cylinder. I have never worked on a brake system before (based on this mistake I should just through out all mechanical ability and start over) so if I can avoid bleeding/flushing the fluid it would probably be best.

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Old 09-08-2012, 03:44 PM   #2
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1. Pick up a mighty vac and fill reservoir with proper fluid
2. Crack the right rear wheel bleeder open and put the mighty vac on the bleeder
3. Extract a full reservoir of brake fluid through that bleeder into the mighty vac HAVE SOMEONE WATCH THE RES AS TO NOT RUN IT DRY.. ALWAYS HAVE FLUID IN IT!!
4. Fill reservoir and repeat process with other three wheel moving closer to master cylinder each time...

*** NEVER TOUCH THE BRAKE PEDAL DURING THIS PROCESS***

This will clean out any improper fluids in your system... pick up 2-3 large bottles of brake fluid while getting the mighty vac.

They are not too expensive and the kit looks like this for around $40


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Old 09-08-2012, 04:57 PM   #3
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Quote:
Originally Posted by TnDz TJ View Post
1. Pick up a mighty vac and fill reservoir with proper fluid
2. Crack the right rear wheel bleeder open and put the mighty vac on the bleeder
3. Extract a full reservoir of brake fluid through that bleeder into the mighty vac HAVE SOMEONE WATCH THE RES AS TO NOT RUN IT DRY.. ALWAYS HAVE FLUID IN IT!!
4. Fill reservoir and repeat process with other three wheel moving closer to master cylinder each time...

*** NEVER TOUCH THE BRAKE PEDAL DURING THIS PROCESS***

This will clean out any improper fluids in your system... pick up 2-3 large bottles of brake fluid while getting the mighty vac.

They are not too expensive and the kit looks like this for around $40

Good Advise,If you do not have or can't find a Mity Vac try the Gravity Method assuming all contaminated fluid was removed,Open Right rear bleeder & with cap off Master Cylinder let it drip till you get good clear fluid then close the bleeder & Move to Left Rear-Right Front-Left Front Same Procedure for each wheel,Remember keep fluid topped off don't let it run dry!
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Old 09-08-2012, 05:22 PM   #4
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My wife put motor oil in her master fluid res. I replaced it in a Sears parking lot in the middle of winter. I used a turkey baster to remove the fluid and kept replacing with new till I couldn't see any more oil (they stay seperated so it was easy to see). I got lucky with it cause I never had to crack a bleeder and that happened about 20,000 miles ago, I had forgotten about it till I saw this thread.
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Old 09-08-2012, 07:19 PM   #5
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I forgot to mention one thing....

Leave the cover OFF the master cylinder for the mighty vac process above.

I know I said it, but I will say it again....

*** NEVER TOUCH THE BRAKE PEDAL DURING THIS PROCESS***
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4" Lift, 4.56's, 33" Duratracs on M/T Classics
RR SYE, Tatton CV, MML, BL, TT, Dynomax Exhaust
Hella Lighting: Driving, Fogs and H4 E-Codes
NOPE! ... and NEVER will be...
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Old 09-08-2012, 07:27 PM   #6
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"Twas me, I would be sending the (presumably) contaminated brake fluid upstream instead of downstream. Petroleum products are ruinous to brake system seals; no need to distribute it any more widely than can be avoided.
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Old 09-08-2012, 08:05 PM   #7
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Thanks everyone, got the MityVac and cleared the reservoir and then bled the lines, taking it out tomorrow for a slow drive to make sure everything clear properly.

I really appreciate the help.

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