On Tue, 9 Apr 2019 14:19:51 +1000, James
wrote:

On 9/4/19 1:11 pm, John B. wrote:
On Tue, 9 Apr 2019 10:33:21 +1000, James
wrote:

The GLW has Shimano hydraulic disc brakes on her urban commuter/touring
bike.

Recently the front brake system degraded to the point that the lever
could easily be pulled all the way to the bars. Not good. I bought a
bleed kit and Shimano brake oil for $50. I bled both front and back
brakes as instructed by Shimano. The front brakes worked again as new.

Just as a comment, you can buy mineral brake oil equal in viscosity to
Shimano's for considerable less money :-)

Thanks. I assumed so, but wanted the funnel, syringe and hose as well,
that all came as part of a bleed kit.

Amazon sells a complete kit, funnel, hose, oil etc. for about A$ 22.40
(I'm assuming that the Ausi dollar is about par with the Singapore
dollar )


The front brake started making horrid squealing noises. I'm not certain
if this started before or only after I bled the brakes.

However, I noticed the hose from the front brake caliper was damp with
oil near the lever. I suspect the hose connection to the lever has
leaked. Perhaps this is why the system needed bleeding in the first
place. I tried tightening the nut (that compresses an olive on to the
hose just inside the lever body). I'm not certain I have stopped the
leak though.

I suspect the oil moved down the outside of the hose and on to the disc
and pads, and that is what caused the horrid noise.

Clean the discs and pads with something like alcohol, that leaves no
oily residue, and see if that helps temperately but if the pads are
oil soaked they will have to be replaced.

I used acetone.

That will work.

My cable actuated disc brakes on my gravel/touring bike are working fine
though.

Probably don't have to bleed them very often either :-)

Indeed.
--
cheers,

John B.