1 Brake Fluid Sun May 15, 2011 10:32 pm
Rickmeister
Life time member
Recently flushed the fluid out of both front and rear systems. (1990 K100LT ex-police, ABS) Used a sucking device and all seemed to work great.
Had it done at Brisans (Newcastle, NSW, BMW dealer) about 18 months ago. They replaced the fluid with Dot 5 stuff, even though the manual stipulates Dot 4. I used Motul Dot 5.1 in the recent flush. After about 200Km, the rear master cylinder started leaking quite badly! I've ordered a replacement cylinder from the BM Shop in Brisbane. They advised that the rubber kit may not work as the cylinder walls may be badly pitted and suggested that a new cylinder assembly be installed.
The questions are: Should I keep on with the Dot 5.1, or replace it with Dot 4? Did the Dot 5.1 cause the failure of the cylinder? The caliper does not leak and appears to be working fine.
I haven't pulled the cylinder apart yet, just unbolted it ready to pull apart.
Also, the hose from the reservoir to the cylinder will probably need removal and re-attaching to the new cylinder. It has a crimp hose retainer. Is there a simple effective way to remove / replace the crimp, not having the special tool required?
Got to get this happening by Thursday, for the ride to Urunga!!!
Cheers, Rick G.
Had it done at Brisans (Newcastle, NSW, BMW dealer) about 18 months ago. They replaced the fluid with Dot 5 stuff, even though the manual stipulates Dot 4. I used Motul Dot 5.1 in the recent flush. After about 200Km, the rear master cylinder started leaking quite badly! I've ordered a replacement cylinder from the BM Shop in Brisbane. They advised that the rubber kit may not work as the cylinder walls may be badly pitted and suggested that a new cylinder assembly be installed.
The questions are: Should I keep on with the Dot 5.1, or replace it with Dot 4? Did the Dot 5.1 cause the failure of the cylinder? The caliper does not leak and appears to be working fine.
I haven't pulled the cylinder apart yet, just unbolted it ready to pull apart.
Also, the hose from the reservoir to the cylinder will probably need removal and re-attaching to the new cylinder. It has a crimp hose retainer. Is there a simple effective way to remove / replace the crimp, not having the special tool required?
Got to get this happening by Thursday, for the ride to Urunga!!!
Cheers, Rick G.