New MC assembly bleeding issues (7 Viewers)

[squidmotion]

Long story short, and let me preface this by saying Andy Le is very easy to work with, and I have absolutely no complaints with him or his service.. I’m just unlucky it seems.

However, after two rebuilt MC assemblies from Andy, the first one started leaking, second lasted one day, then I had a total brake failure. I can’t abide this, as my girls drive this machine sometimes.

So I ordered a brand new assembly from Toyota.

I haven’t had any bleeding issues with the rebuilt units, but after installation of the brand new Toyota unit I’m going through the usual bleed procedure with no luck at all. I feel like all I’m doing at this point is pushing new fluid through the system, but the pedal remains soft.

Cleared the ABS/Brake code, but the BRAKE light is still on. I’ve done the 40 pumps, then the bleed process for the rear. No luck. Then bled the front, seemed to get better, then pedal goes to the floor again. I’m not leaking anything. Brakes are in good shape, lines are in good shape. no rust anywhere, bleed screws are fine.

I’ve done this three times now, and gone through 4-6 bottles of fluid, still no luck, pedal goes right to the floor. I’ve done the rear, then the front, and the front again, and then the rear again. I’ve never let the MC run dry. Everything worked fine after bleeding the last two rebuilt MC units.

I clearly have air in the system still, or is it something else? The motor runs as normal, no more than 40 seconds.

I’ve searched and researched all the Mud forum posts..

What the hell am I doing wrong?

 

[x8o8drifter]

So just for clarification. When you say you've "gone" through 4-6 bottles.
Does that mean you have put 4-6 bottles in it and none is coming out? (less the tiny amount from cracking the bleed screws)
Air in the ABS block itself maybe? Should be something in TS to help bleeding that.
Caliper line and ABS flush using Techstream

 

[squidmotion]

So just for clarification. When you say you've "gone" through 4-6 bottles.
Does that mean you have put 4-6 bottles in it and none is coming out? (less the tiny amount from cracking the bleed screws)
Air in the ABS block itself maybe? Should be something in TS to help bleeding that.
Caliper line and ABS flush using Techstream

Thanks for the reply and the link x8.

I've bled out through the bleeders 4-6 bottles. I've removed air from the front, and rears, but still have a soft pedal. I'm not using TechStream, but I am using the MC motor running to bleed out the rears, as I did the previous times.

 

[nissanh]

Link to my install: LandCruiser 100 Brake Master Cylinder Installation - The Easy Way! - https://forum.ih8mud.com/threads/landcruiser-100-brake-master-cylinder-installation-the-easy-way.1293213/

On the first post I followed the sticky note instructions to get the master ready (It was from a youtube video posted by a toyota mechanic in Moldova). It worked for me 100%

Watch the video posted in the first post
Note 19 tells about bleeding the rear brakes.
front showed no sign of bleeding.. just few drops. The ideo tells the front will bleed on it's own and it worked for me. I drove on a dirt road and (WITH no one behind) I locked the brakes o activate the ABS. That's all I did for front and brakes are solid for past 3 years!