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5.
Maintenance
5.1 General
Proper maintenance of a bike equipped with MPH DISC BRAKES is important to insure years of trouble
free safe riding.
Check by dealer.
Take your bicycle to an authorised Giant dealer for periodic service and inspection of MPH
braking systems. Parts such as brake pads, hoses and seals, can be adversely affected by use,
dirt and ultraviolet radiation. The MPH brake system has to be checked by a dealer once a year
or more often if the bike is used in extreme conditions.
High-pressure.
DO NOT use high-pressure water or air hoses to clean bike. This can force dirt into parts of the
hydraulic braking system, which may cause damage.
Brake fluid, lubricants on brake pads and rotors.
It is essential that the rotor is clean (free from grease or oil residues) to avoid contaminating the
brake pads and insure perfect braking.
To avoid brake fluid spillage on the rotors or brake pads, causing contamination of the brake
pads, it is advisable to cover the vital parts with a rag before maintenance of the hydraulic
system is done, or when lubricating parts of the bike.
If brake fluid comes in contact with paint or plastic bike parts, wipe it off immediately.
If you get any brake fluid on the brake pads, discard them and replace with new pads.
DOT 4 or DOT 5.1 brake fluid.
The fluid in this braking system (use DOT 4 or DOT 5.1 brake fluid only!), besides possibly
damaging the paintjob and some plastic parts on the bike, is extremely hazardous in case of
contact with eyes or skin. Use protective gloves when working with brake fluid.
We recommend to replace the brake fluid in the system at least every 2 years. This fluid
naturally absorbs water, which will result in a lower boiling point for the brake fluid and can
cause poor braking.
Do not mix DOT 4 and DOT 5.1 brake fluid!
The MPH brake sets have been filled by Giant with DOT 4 brake fluid.
Washing and cleaning.
After riding (off road) in the dirt, clean the bike (and the components of the braking system) as
usual with water, soap, washing-up liquid, etc.
Remember: do not use high-pressure water or air hoses.
After washing the bike or riding in the wet, take the wheels out of the bike.
If the wheels remain in the bike, water may stay between brake pads and rotors and cause
corrosion.
After wiping dry with a clean soft cloth, remove all dirt from the brakes with a soft brush.
Thickness of brake pads.
Check thickness of brake pads before every ride. Replace pads before they are worn down to
the back plate to assure proper function and to prevent damage to the rotor.
Adjust knob.
By turning the big adjust knob on the fluid reservoir of the brake lever, it is possible to set the
pressure point of the braking system to personal preference.
Also, in the same way, brake pad wear can be compensated and brake pad to rotor clearance
can be adjusted.
If the knob is turned clockwise but the space between the brake pads and the rotor remains too
much (the brake lever has to be pulled too far), the brake pads have to be checked for wear.
