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Bleeding Hydraulic Brake Systems - Bleeding the brake system is a procedure where new hydraulic fluid is
used to replace leaked oil or to flush out any trapped air. Air in the system will reduce the braking
performance and the feel of the brake. To bleed your brakes, follow the instructions that were supplied with
your brakes. Parts and spares are available from ICE. Your brake takes mineral oil, which is not the same as
hydraulic fluid used for automotive brakes and clutches. Using automotive fluid will ruin the seals in your
brakes and they
WILL
fail! Always use mineral oil; a good source is LHM mineral oil used in many Citroen and
Jaguar motor vehicles. One litre is inexpensive and will last you a lifetime.
Troubleshooting
Symptoms
Possible Cause
Corrective Action
Lever goes to the handlebar
System leak
Air in the System
Brake pads worn out
Re-bleed the system
Re-bleed the system
Replace pads
Spongy Lever
Air in the system
Re-bleed the system
Disc Rotor rubbing on the Pads
Calliper not centred over disc
Inadequate clearance
Bent rotor
Re-centre the calliper
Push piston back
Replace new rotor
No braking power
Contaminated pads
Worn out pads
Contaminated disc
Replace new pads
Replace new pads
Clean disc with alcohol
Pads fall out
Missing pin
Replace pin
Fluid loss
Hose leaking
Banjo leaking
Calliper bleeding
Tighten hose nut
Replace new hose
Replace banjo O-ring
Tighten or replace bleeder
Warning: If you are not confident of servicing your
brakes correctly, we strongly recommended that you
have a competent cycle mechanic service your disc
brake system. Always wear protective clothing,
safety glasses and gloves when servicing this
system.
5.5 Rear brake
The parking brake is operated from a small lever mounted on the left-hand handlebar. Because the brake
functions as a parking brake, it is necessary to make sure that it holds securely. Check the brake's function,
and if it appears to be slipping, tighten up the central bolt on the brake lever using a large flat screwdriver.
5.6 Drivetrain
The chain pulley on the tension side of the chain will wear over time. Initially it may make a small amount of
noise, but within a few weeks it will bed in and run much quieter. A pulley should normally last about 10,000-
12,000 miles, but if it shows significant wear, replace it.
