Hope RX4+ Bedienungsanleitung

CAUTION: READ THIS BEFORE
INSTALLING YOUR BRAKES!
Riding bicycles can be dangerous. These instructions should be read
thoroughly before installation. Failure to follow these instructions
before installing and using Hope Technology components can result in
severe injury or death.
This RX4+ caliper will solely work using DOT4 or 5.1 brake fluid, the
use of any other brake fluid will result in brake failure. Please check
first on our website the list of master cylinder compatible with this
RX4+ caliper.
The D letter etched on the larger bore cap indicates that the caliper
DOT4 or 5.1
is compatible with brake fluid only.
If a M letter is laser etched it means that the caliper is compatible with
Minerail Oil brake fluid, do not attempt to use with DOT brake fluid.
• Don't overestimate your technical capacities. This brake system must
be fitted by a competent cycle mechanic using the correct tools.
• Incorrect installation could result in brake failure that could cause
serious or fatal injuries.
• Please refer to the website videos and technical documents for more
information including servicing and maintenance -
www.hopetech.com / Tech support section.
• This brake system has been designed to be used only on two-wheel
vehicles with human propulsion. Any other application is not
advisable and could result in the failure of this product.
• Your brake system will generate heat during braking. Never touch
either the disc or caliper after long braking period as this could
cause severe burns.
• Before each ride always check the brake for proper function, the
brake pad for wear and that there is no system damage resulting in
fluid leaks.
• It's common sense to also check that your wheel's quick release
systems are securely installed and tightened.
• Your braking performance will improve in almost all conditions. Please
take time to become familiar with your new brake. Always ride within
your own ability.
• Brake pad contaminated with brake fluid, chain lubricant or unsuitable
bike cleaner will need replacing because the overall brake performance
will be greatly diminished.
• If you have any doubts or questions please contact your dealer or the
appropriate distributor for your country.
• If you decide to ignore these important safety warnings and
instructions, you are doing so at your own risk and Hope Technology
cannot be held responsible for any consequences resulting of the
misuse of the brake system.
BOX CONTENTS
001_Brake Caliper with pad spacers 002_Caliper bolts (size and
length may vary) 003_Hydraulic fittings: copper washer, brass
insert, brass olive and shroud 004_Brake pads: Blue Road
Red CX/Gravel (visual may change upon model)
002
001 004
003
TOOLS REQUIRED
• 2.5mm Hex • 4mm Hex • 5mm Hex • 8mm Spanner • T10 torx driver
• Flat blade screwdriver • Pick / awl tool • Appropriate Bleed Kit
(2x bleeding syringe with M5 end)
ATTACHING THE CALIPER TO THE
BRAKE LINE
Always use the provided Hope hydraulic fittings on the caliper
end and original manufacturers fittings at the lever end.
001_Remove the third party caliper if present and disconnect
the brake hose.
002_Slightly open the hose internal diameter with a pick
003_Install the hydraulic fittings provided onto the brake
hose as shown on figure below.
004_Connect the brake hose to the Hope caliper
002
Washer Olive
003
Shroud
Brass Insert
BLEED THE BRAKE SYSTEM
DOT4 or 5.1 ONLY!
PRELIMINARY CHECKS:
• Make sure lever reach is fully out to get full lever travel.
• Get the caliper at the lowest point, so bleed off the bike.
Be wary of air getting trapped around the bottom bracket
area if internal hose routing, the caliper is often higher
than the bottom bracket.
• Make sure the provided bleeding pad spacer blocks are both
placed in the pad chamber to avoid soiling brake pads with any
uncontrolled spill. Using only one spacer could result in the
pistons travelling too far out and loss of brake fluid.
BLEEDING PROCEDURE:
• Start with the caliper syringe full and the lever end
syringe 1/3rd full. Fill the system from the rear syringe, send
fluid back to the lever syringe a few times.
• Isolate the caliper by holding the lever with a rubber band or
a friend then use the syringe as a vacuum at the caliper to
gently draw air out - careful not to pull air past the seals.
• Whilst pushing fluid back in the system from the caliper
syringe slowly release the lever back to the open position.
• Remove the bleed syringe from the caliper and put the bleed
port screw back in. Recommended tightening torque 2-3Nm.
Encourage one side of the pistons out by holding the opposite
side of the caliper pistons back and squeezing the lever
(see figure below).
• Put the bleed syringe back on and then use a tool to push the
caliper pistons back in. Any air trapped behind the pistons will
escape through the syringe, repeat the same steps with the
other side.
• Lock off the caliper and then flick the lever aggressively, fully
braking and allowing it to return fast, the brake should feel
solid, if it doesn't repeat the bleed procedure.
• Finally push the pistons back and remove the lever syringe.
• Clean the caliper using isopropyl alchol
Pad Spacers x2
ATTACHING THE CALIPER
TO THE FORK OR FRAME
To ensure that the caliper is properly aligned and to help avoid
squealing, bad lever feel or brake pad rub - prior to fitting the
brake, it is important that the tabs of your fork or frame are
clear of any paint or burrs..
IMPORTANT WARNING: Full thread engagement is required
when installing the caliper on the forks or frame rear flat mount
• Postmount type caliper: 9 to 10mm of the 2x M6 screw
must be engaged in the forks
• Front direct flat mount caliper: 8 to 9mm of the 2x M5 screw
must be engaged in the forks
• Flat mount caliper (std or +20): 7 to 8mm of the 2x M5 screw
must be engaged in the caliper body. Beware of this type of
fitting as tab thickness can vary from one frame to another.
(see figure below)
Also pay attention not to bottom out the screw in case they
were too long. We recommend the use of a mild engineering
thread lock on caliper bolts to prevent them unscrewing.
Do not use permanent thread lock!
7 to 8mm of thread showing
above rear flat mount tabs
MOUNTING THE CALIPER
• Before attaching the caliper ensure that the brake pads or pad
spacers are removed, and the pistons are fully retracted. This
is to facilitate the caliper alignement.
• Mount the wheel fitted with the rotor, ensuring correct fitment
in dropouts.
• Position the caliper on the brake mount and slightly tighten the
two bolts.
• At both front and rear of the caliper, adjust its position so it is
central over the rotor (see arrows on figure below) then tighten
the two bolts using a 4mm or 5mm hex.
Recommended tightening torques:
M6 bolts 8-9 N.m M5 bolts 8 N.m
• Install the pads in the caliper, secure them with pad in and
retaining clip.
NOTE: We do not recommend pumping the lever to push pads out to
align caliper at this point. See the next section regarding the alignment
of pistons.
CENTRALISE THE PADS OVER THE DISC
THIS STEP IS VERY IMPORTANT AND MUSTN'T BE IGNORED.
Gently pump the lever to bring the pads closer to the disc.
One pad might enter in contact with the disc before the other.
If this happens, hold the disc against the pad that is already
in contact with the disc to allow the other one to move.
For an optimised lever feel, both pads must enter in contact
with the disc at the same time and allow the same clearance
(see arrows) when retracted. The disc should not be flexing
at any time.
Plaquette
Disque
Plaquette
BREAK IN PERIOD
AND MAINTENANCE
Before riding and before every ride, check the correct action of the
brake and that braking effort is applied as the lever is pulled. To achieve
the maximum braking performance, the new pads will need bedding in.
NOTE: Sintered pads take longer to bed in than organic pads. To bed in
the pads, ride a short distance whilst alternatively gently applying the
brake on and off without attempting to stop. This procedure will achieve
good braking performance but will reach its full potential after a few rides.
About maintenance tips refers to our "how to" videos on the website. To
optimise the performance of the brake it is important to keep the caliper
pistons lubricated using silicon lubricant only. We advice doing this at
least at every pad replacement. For brake bleeds use only DOT4 or 5.1
brake fluid from a clean container.