User Guide

40
Introduction
The brake system allows you to control the speed of your bicycle, and
this function is critical to your safety. The brake system can be difficult
to adjust properly without the proper tools and training. If you are
unsure of the brake adjustment, or suspect any problem, do not ride
your bicycle. Take your bicycle to your Fisher dealer for service. It is
strongly recommended that adjustment of critical components such as
brakes be done by your Fisher dealer.
Read the disc brake Owner's Manual you received with your bike. If
you did not receive a disc brake manual, get one from your dealer, or
contact us and we’ll send you one. The following information is only
meant to supplement the disc brake manufacturer’s manual.
Inspection- Disc Brakes
Before every ride make sure your brakes are working properly.
Check that the brake pads are in proper position. The pads should
allow 0.25 to 0.75mm clearance from the disc when the brakes are
not applied. Spin the wheel. When the brake lever is not pressed, the
brake pads should touch as little as possible on the rotor (disc). Do
not touch the disc brake rotor after hard use as it may be very hot.
Before every ride squeeze the lever firmly. It should not be possible to
pull the lever fully to the handlebar. If the lever of a hydraulic activated
disc brake feels spongy, or can be pressed with little resistance, the
system may need to be bled to remove air bubbles. Take your bike to
your Fisher dealer for service. If the lever of a cable actuated disc
brake can be pulled to the handlebar, follow the adjustment instructions
in the following section.
Once a month tighten the brake mounting bolts, and any adapter
mounting bolts using a 5mm allen wrench, to 100-110 lb•in (11.3-12.4
Nm). For adapter bolts using a 4mm allen wrench, tighten to 60-65
lb•in (6.8-7.3 Nm). Tighten rotor attachment bolts holding the rotor to
the hub to 45-55 lb•in (5-6.2 Nm). Tighten Hayes hydraulic brake lever
attachment bolts to 25-35 lb•in (2.8-4 Nm). For cable actuated brakes, tighten the cable
clamp bolt to 50-70 lb•in (5.7-7.9 Nm).
The rotor (Fig. 58) is part of the braking system, so keep it clean at all times. Check that
there is no oil, grease, or other dirt on the rotor. Remove the brake pads from the caliper
during heavy cleaning by pulling outward to release the spring clip. Do not use cleanser,
degreaser, or solvents to clean the disc. To clean discs, use isopropyl alcohol.
With hydraulic actuated disc brakes, check the brake hose for kinks or leakage every
month. Replace any part of hydraulic hose which does not pass inspection. Replacing
hydraulic hose requires re-adjustment of the braking system with special tools and
training and should only be done by your Fisher dealer. Do not let brake hydraulic fluid
contact the bicycle as it may remove paint.
With cable actuated disc brakes check your bike’s brake cables and housing every
month. Check the cables for kinks, rust, broken strands, and frayed ends. Check the
housing for bent ends, cuts, stretched coils, and wear. Replace any part of your brake
cables or housing which do not pass inspection.
Every month, inspect disc brake pads for wear. If disc brake pads are less than 1.0 mm
thick they should be replaced.
BRAKE SYSTEMS- DISC BRAKES
Reach adjustment screw
Barrel
adjuster
Cable
Lever clamp bolt
Fig. 59
Rotor
‘B’
WARNING
Disc brakes can get very hot and could cause burns. Do not touch
the rotor (brake disc) for at least 30 minutes after braking.
Keep away from parts like rotors and spokes when rotating. They
may cause personal injury.
Fig. 58