Hope Tech C2 Brake - Manual (Page 39)

39
7. New 2001 Disc brakes
For 2001 we have made several changes to the open system brakes. The key changes
to the new brakes are shown below.
Enduro 4 caliper
This caliper replaces the DH4. It uses the same pads and seals as the previous DH4.
The major change is to the caliper body, which has been refined and made more
compact. These changes reduce the weight and make the bleeding process easier due
to the improved fluid flow within the caliper. The Enduro pads are held in place with two
screws and a spring.
Mini caliper
This caliper replaces the Open 2. The Mini is a smaller and lighter version. All parts in
the caliper, including the pads and seals are new. The Mini pads are held in place with
a single screw.
Installation and maintenance
Enduro and Mini are still open system designs and installation and maintenance is
carried out in the same way as described in this manual for the DH4 and Open 2
calipers. The master cylinder on the Enduro and Mini caliper brake lever is slightly
different since it now incorporates a revised design. The following notes should be used
when bleeding these calipers.
New open system diaphragm
Instead of the aluminium master cylinder piston of the early open systems (DH4 and
Open 2) we have fitted a special rubber diaphragm that will react much quicker to any
temperature changes or pad wear.
When fitting the diaphragm the master cylinder should be filled to the top with fluid.
Now push the diaphragm onto the fluid with as little air as possible under the rubber. It
is impossible to fit with no air under the diaphragm so do not worry if you cannot expel
all the air.
If you have any questions regarding this operation then please get in touch with us.