Ok .................is some body messin with my car when im not lookin????
Well guys I reinstalled the calipers the correct way.
Bled everything all over.
And the pedal still goes to the floor!!
I mounted the old MC in a vise bled that one Pluged the holes and it wont push in. so my Orginal MC seems to be working.
I stoped at this point its raining ..................And need more brake fluid.
Time for coffee.......
Any other ideas ???

Ive been doing this for 30 years and never had this much trouble....
(Not with the same car however).

You're a good man, Anthony. The weather is miserable out there this morning.

Any possibility that the new m/c is not working properly? Did it feel OK in the vice?

My next Task is to plug the MC in the car. ............and push the pedal to test it. Ruling that out........... Himmmmmmm...............
Ill bleed the MC in the car.
And start over.............
As Peter mentioned ill try the MitiVac and vacuum bleed the lines.
If the calipers were leaking you would see it.??
I ckecked all 4.??
Nuttin honey ................??
Checked all the lines again.
Any body wana try something now that I own a test mule?
Hey lets tear down the engine and see if any rods are bent?
After all it is a 350sd.
I think im ready to bleed the 300SE brakes.
Just to see what happens.......................

Oh ..Yes Brian...
the new MC seems to be fine but I will pressure check it as well.
I disassembled the old MC looks fine.
No score marks Perfect cylinder.

IMHO, this cannot occur just by having a bit of air in the lines. Both systems have failed. You cannot build pressure in either system. The chances that you have a massive amount of air in both systems due to an incorrect bleed are slim. However, I'm not familiar with the ABS and whether it is possible to trap a lot of air there.

Still, if the pedal goes to the floor, I believe the problem to be in some way traceable to the m/c. It just makes no sense that air downstream of the m/c could result in this.

#A. Do you have a good brake pedal with car off?
#B. Have you done any suspension work that may have put stress on the wheel speed sensors?
#C. Have you removed the wheel speed sensors?
#D. Have you inspected the wheel speed sensors for damage?
#E. Have you tried unplugging the ABS motor?
#F. Is your ABS light on?

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

Brian
...I agree with you 100 %
Whunter...
Answers
#A. Do you have a good brake pedal with car off?
Better. much firmer
#B. Have you done any suspension work that may have put stress on the wheel speed sensors?
no
#C. Have you removed the wheel speed sensors?
no
#D. Have you inspected the wheel speed sensors for damage?
yes They look fine ....just wiped everything clean
#E. Have you tried unplugging the ABS motor?
No ...I did bleed all the fittings however
Is it possable that the ABS is air bound??
#F. Is your ABS light on?
Light is off.

With the ABS, there is a mile of line, and since you KNOW you got air in there, I'd vacuum bleed, works better to get the bubbles out.

Check to make sure all the lines are tight and not sucking air in (I've done this, minor leak under pressure and tons of air sucked back when you release the pedal). The 280 was doing this last time I did brakes, was the caliper to hose connection not tight.

Make sure you let the pedal up slowly, too, or you can expand a bubble in the lines rather than pulling fresh fluid in.

It's gotta be something simple, after all!

Peter

__________________
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!

Yes Peter ...
I agree...
Its raining sideways right now ......
So tomorrow is looking better....
*********Thanks everyone for your inputs************
I let you know what i find...
-A

Whunter...
Please.........by all means let me know your thoughts.
Maybe I missed something??

Hello Anthony
Recap of data:
1. Much better brake pedal with car off.
2. No suspension work done.
3. No wheel speed sensors have been R&R.
4. Wheel speed sensors have been inspected for damage.
5. You have not tried unplugging the ABS motor.
6. You did bleed the ABS fittings.
7. ABS light is off.

Best guess is the ABS motor is full of air.
These are dangerous procedures.
I have seen thirty five foot sprays and body panels stripped to bare metal in seconds.
The ABS pump generates high pressure; never allow any part of your body to enter the path of bleeding fluid, loss of fingers, eyes or serious injury can result.
Use safety glasses and gloves, the fluid can be heated to high temperatures by the ABS system.
If you open a bleeder too far and can not close it, and it sprays out of control, better too climb out and turn off the car than risk injury to yourself.
Open the bleeder the least possible amount.

Follow these system bleeds in order.
#A. Try bleeding ABS motor with key on, and brake pedal applied gently.
#B. Try bleeding ABS motor with engine running, and brake pedal applied gently.
#C. Try bleeding calipers with engine running, and brake pedal applied gently.

In this case, be afraid, it may save you a nasty injury.
If you are not utterly confident in what you are doing, take it to your local independent or dealer.
The last seminar on ABS that I attended had a demonstration of a system that hit peak pressures of 3800 PSI.

Note:
With key off, pull and insert the ABS relays three times, to reestablish terminal contact.
Some of your ABS system part pictures attached.

Attached Thumbnails

       

Still no brakes......................
I tryed everything.???
Pressure vacuum....both.......bench bled the MC.?????
The pedal is firm when the engine is off.....
While running It goes to the floor......it will pump up on three pumps but then goes to the floor...................
I was able to run the ABS motor independent of the system.
Bled everything again back to front including the ABS unit with the ABS motor Running ....................Nuttin................

?????????????????????////

Stop beating your head against the wrong wall, the standard hydraulic system sounds OK.

Unplug the ABS motor and retest the brakes with car running.
If system function is normal, the issue is in the ABS....
A bad wheel speed sensor, relay or ABS pump relief valving may have sediment jamming it = another pump.

__________________
ASE Master Mechanic
https://whunter.carrd.co/

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D
2003 Volvo V70

https://www.boldegoist.com/

Unpluged the ABS motor and retested the brakes with car running.
Pedal goes to the floor???..............

Remove and plug the vacuum line to the brake power booster and retest.
Now, I am getting ticked off at your car. :Grrr: