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Old 08-25-2003, 07:16 PM
Coming back from burnout
Join Date: Jun 1999
Location: in the Pacific Northwest
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Rebuilt Calipers--how do I get brake fluid into them-(feeling dumb )(85 300D)

I just rebuilt my Front brake calipers on my 85 300D.
How do I get Brake Fluid into them?
I have tried pumping them, opening different connections,vacuum and a pressure bleeder and they are still dry as a Bone at the Bleed valves.
I don't feel too smart. I got at least a working grasp of Fluid Mechanics and engineering, but I cant get the brake fluid to dribble. Last two times I did this, I remember it was a piece of cake.
What am I doing wrong?

Rebuilt Calipers--how do I get brake fluid into them-(feeling dumb )(85 300D)

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Old 08-25-2003, 09:04 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Make sure you have enough fluid in the master cylinder and that it has been bled enough to draw it in -- if you have only air in it, you can go back and forth forever.

You should be able to just open the bleeders with the master cylinder reservior full and apply a bit of vaccum -- this will pull the fluid down nicely. That's what I did on the 280 SE. Open only one side at a time to avoid pulling air across the brake lines though.

Failing that, a traditional bleed with two people will work the best, as any air forced out of the calipers will then cause fluid to be drawn in at the master cylinder.

1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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Old 08-25-2003, 11:54 PM
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Join Date: Apr 2002
Location: NW WA
Posts: 6,299
I installed new callipers, hoses, and pads on the rear of my "79" 240d a couple of weeks ago. I screwed up bad as I installed them upside down (bleed fitting must be on TOP) and couldn't get them to work, however fluid came out when I bled them with the speedy bleeder but the pedal would not firm up. Someone suggested I check the orientation of the bleed fitting. thanks again

Good Luck


1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
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