Temporary ABS Removal 2004 R1150RT
I may be removing my ABS pump this weekend to get at the fuel distributor and voltage regulator (if I need to to get to the VR). The BMW manual calls for emptying the brake fluid from the system. Is that needed or can I just contain the leakage?
Any other tips on the ABS removal?
Start with disconnecting the battery
This is all my opinion based on my experience and is probably different than what a specific service manual might offer. I always start with disconnecting the battery. I don't have a great explanation why but a habit of mine that I have never regretted and I really don't want to guess what might go wrong if I don't disconnect the battery. Some manufacturers demand that you do.
I always leave fluid in the system. I take the lines off and cap/plug them to keep crap out. I don't like to guess if a master cylinder has a residual pressure valve but I have discovered that if a master cylinder runs empty and the residual pressure valve is in rough shape, you will never get a firm feeling from it ever again. For me, I have always had to replace the master cylinder afterwards no matter what I do to try to get it to recover.
I also believe the less often you open a system, the less likely you are to introduce contaminants, like dirt or atmospheric humidity. I like to keep as much of the system closed for as long as I can until I'm ready to bleed.
Then again, I have a buddy that has a completely different approach and it works for him.