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87 Euro500HVSEC. 88 Euro 560HVSEC. 89 Euro 560HVSEL
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Discussion Starter · #1 ·
I visited a workshop yesterday morning (specialises in European cars only) and the boss & i got talking about my SEC.
The owner is an 80's period nut and raves about the W126's.

Whilst there he tested my brake fluid with a special gadget that reads the moisture content in the fluid and showed me the readout which he said was too high.
He warned that moisture in the brake fluid can destroy the ABS as well as the usual problems with corrosion to the piston bores etc.

He advised mine needed "power flushing" to esnure all traces of moisture is removed from the entire system at up to 100psi pressure to flush.
He advised the normal brake fluid change by loosening the brake nipples one at a time and pumping the pedal method to change the fluid won't be effectively enough to clean the system out thoroughly
Cost AUS$140

Has anybody got any idea how top perform this method at home.
I have an air compressor etc.
Any comment/ Feedback & tips please.
Thanks
 

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1983 500 SEC Lorinser 1971 280se w108
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1,963 Posts
Rightly or wrongly I wouldnt be pushin that kind of pressure through a 20+yo ABS unit
 

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Premium Member
87 Euro500HVSEC. 88 Euro 560HVSEC. 89 Euro 560HVSEL
Joined
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4,390 Posts
Discussion Starter · #3 ·
Rightly or wrongly I wouldnt be pushin that kind of pressure through a 20+yo ABS unit
I could have go the figure wrong as we talked about lots of things with the mechanics of these cars.

How is this method carried out and what's hooked up to perform it.
any input please
 

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1984 500 SEL euro, 1989 560 SEL, 1980 450 SL, 1981 DeLorean, 2013 F10 BMW
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1,253 Posts
When I've pressure bled my brakes, we suctioned out the fluid in the resevoir then hooked up the pressure system to the master cylinder. The system was put under pressure to about 12 psi. The fresh fluid is pushed into the system and then we went to the farthest wheel and worked our way back to the closest.

RR, LR, RF then LF. If you decide to use ATE gold or SuperBlue fluid it will let you know when the fresh fluid reaches the calipers. Very easy to do and more reliable than the two person pressing the pedal system.

Regards,
 

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The guy's an idiot. You only need enough pressure to push the fluid out the bleeder screws and of course you CAN bleed them the old fashioned way - just refill the reservoir a couple times until it comes out clear. And if moisture is the problem then you flush on two DIFFERENT DAYS!. Get new fluid in there and use the brakes for say a week, then repeat. That's how a sane person would deal with moisture.
 
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