Hope Tech C2 Brake - Manual (Page 10)

10
2. Compensating for over heating. Extreme heating of the brake due to long descents
with heavy braking may cause the brake fluid to expand and push the brake pistons
(and pads) closer to the disc in which case you may need to back off the pads using
the thumbwheel adjuster, then readjusting as the brake cools down.
The DH4 and Open 2 brakes
These brakes do not provide any means of manual pad adjustment. They do however
feature an expansion chamber within the brake lever master cylinder which
automatically compensates for pad wear and similarly compensates for fluid expansion
as the brake heats up and cools down.
With the caliper correctly centred relative to the disc there should be no disc rub on the
DH4 and Open 2 brakes. Even if there is a slight amount of disc rub it will not slow the
bike down in any way and will not be audible against the ground noise from the tires.
If you remove your wheels from your bicycle take care not to pull the brake levers
otherwise the pistons can pump out. If this happens then simply push the pistons back.
If the pistons are so far out that the pads are touching then you will need to remove the
pads in order to get at the pistons. If you transport your bicycle with the wheels
removed then it is advisable to insert a piece of packing between the pads to keep
them in place.