Brake Flush '06 ABS II
Brake Flush í06 LT ( ABS II )
Disclaimer :- Done by factory trained Techs, with access to diagnostic PC.
Took Jenna to the dealer for a complete brake fluid flush, Control and Wheel Circuits.
I know much has been written here about this procedure, but having now watched,
and assisted the two other mechanics doing this job, it is very do-able with NO special
tools. Perhaps one. An adaptor to bleed the system from the high point, just like a bleeder only much larger.
Very much required.
A good understanding of the correct bleed sequence and much care not to let the reservoir levels go too low and allow air into the system.
The front control circuits were done first, twice. The ABS motor is not used here. Not 100% sure of the exact sequence of bleeding, but this is the secret. I'll do some more research and reading. Drain the master, using a large clean syringe. Refill each time prior to getting too low. Didnít see any issues with spaying fluid with the cover off that I have read about. One guy was filling and pumping slowly with only small lever movements, the other bleeding the ABS screws. Using a straight wrench, not a special BMW one at all, although I could see how a small bend in the wrench would help. If you grab a fistful of lever itís possible to move the piston too far out and thatís not good. A clear drain tube going to a bottle is required to drain and to check for air bubbles. The standard bleeds are prone to allow air past when loosened, and I asked if a thread tape or compound would help. Not much.
Slow and steady seems to be the trick. Not necessary to undo the handle bar reservoir and level, just full left will do.
The rear control circuit was next. Just unclip the reservoir and empty out the old fluid.
Snap the reservoir back in place and continue to refill as the rear brake peddle is depressed. Sorry again as not 100% sure of the sequence of bleeding.
The í06 ABS pump differs from earlier units ( and latter models too Iím told ) The screw in reservoir for the ABS motor used to bleed the callipers ( Wheel Circuits ) needs a flexible connector to clear the frame, which they didnít have. Just a very large and clean hypodermic syringe containing the new DOT 4 was used. Use just enough brake to activate the pump as this reduces the output volume, allowing the syringe to replenish the fluid level before dropping too low. Checking this level and replenishing by eye seemed to work fine. The calliper bleeds use the ABS pump and as long as the level in the reservoirs is kept up, seems a fairly standard bleed technique. Inside reservoir which is higher as more volume needed for twin front callipers. Outside for rear.
At one point we needed all three of us. One topping up the ABS reservoir with the syringe, one bleeding the calliper F/R, and one depressing the brake F/R.
After doing all this, hooking up the diagnostic to perform the bleed test and a check for fault codes is required. I had also asked for a printout for brake usage time.
You can do these 06 brakes with no special tools, ( see above ) but 3 people are needed.
It is always more satisfying to assist techs and demystify the maintenance myths.
This bike has the best brakes on two wheels.
Jenna: Ocean Blue '06
Hilton: Head of the Steering Committee.
Rena: The Committee.
ET4 Thing 1
ET4 Thing 2