Hope Tech M4 Brake - Manual (Page 15)

15
Spongy lever
Symptoms Solution
Reduced braking power and
spongy feel when pulling the
lever. Air in the system. Re bleed the
system (see section 3.3).
If the problem persists then
there may be a system leak
described below.
System leak
Symptoms Solution
Hydraulic oil can be seen on
the outside of the system,
usually associated with a loss
of braking performance. A
typical cause is after a crash
which has wrenched the hose
and damaged other items on
the brake. Or the brake is very
old and the seals have worn
out. Spare parts are available for
your brake. Please consult your
dealer who will advise and
obtain the required spares.
Lever is stiff and does not return
Symptoms Solution
The lever does not snap back
to its return position when
released. On the both levers the pivot
bush (item 12) will need
lubricating. If this does not cure
the problem then disassemble
the lever pivot and clean the
bush, ensuring it moves freely
within the lever blade. Also
make sure the lever pivot screw
(item 18) is not over tightened.
If the wrong fluid has been
used then the piston seals in
the lever will be ruined causing
them to stick and so preventing
the smooth operation of the
lever. In this case you need to
consult your dealer to obtain
new seals.