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Chapter 3: Adjustment 22
Internal Gear Systems
These systems change gears with a mechanism
that is in the rear hub.
To adjust a Nexus 4, 7, or 8-speed systems
1. Turn the shift-lever to the fourth-gear position.
2. Align the indicator on the rear-hub pulley
(Figure 24) with the cog joint bracket.
3. If the red lines are not in alignment, turn the
barrel-adjuster until they are in alignment.
4. Move the shift-lever torst gear. Then move the
lever to fourth gear. Examine the adjustment.
To adjust a 3-speed system
1. Turn the shift-lever to the second-gear
position.
2. Align the indicator on the bell crank window
with the line on the push rod (Figure 25).
3. If the indicators are not in alignment, turn the
barrel-adjuster until they are in alignment.
4. Move the shift-lever to first gear. Then move
the lever to second. Examine the adjustment.
Brakes
The brake system allows you to slow or stop
your bicycle. This operation is critical to your
safety. The brake system is not easy to adjust
without the correct tools and training. It is
strongly recommended that only your dealer
adjust a brake. If more aid is necessary, speak
to your dealer.
Types of brakes
Different types of bicycles have different types
of brakes. The brake types can be divided into
three types:
Hub brake: a “coaster” brake or drum brake,
where the brake mechanism is inside the hub
(Figure 26). A hub brake can be controlled by
a hand lever, or by the pedals.
FIGURE 24:
Nexus rear hub
1. Pulley
2. Cog joint bracket
3. Cable-clamp bolt
2
3
1
FIGURE 25:
Three-speed rear hub
1. Bell crank window
1
FIGURE 26:
Coaster brake
Rim brake: brake pads apply pressure to the
rim. The pressure is controlled with a hand
lever that is connected to the brake by a cable.
Examples include direct-pull or V-type brakes
(Figure 27), cantilever brakes (Figure 28), and
road or caliper brakes (Figure 29).
The rim brake system includes these parts:
• Brake • Brake pads
• Rim • Brake lever
• Brake cable and housing
• Brake modulator- some front direct-pull
brakes are equipped with a brake modulator,
or “Power modulator.” This device includes
a small spring in the pipe (Figure 27) that
changes the way the brake works during the
27


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