Coaster Brakes; Wheels - Orbea ALMA Instruction And Maintenance Manual

Removing the rear wheel
First, disconnect the rear derailleur and brake cables. To disconnect the brake cable, be careful
not to touch the rear hub since it may be hot even 30 minutes after use.
To disconnect the gear cable, shift to the outside cog. Pull the cable housing and turn the
mounting nut until the washers align with the groove. Once this is completed, you can remove
the cable.
To uninstall the hub from the frame, turn the hub bolts gradually in small movements so that
the adjustment of the bearing axis is not affected.
To install the rear wheel, follow the instructions above, inversely, including the slow tightening
of the bolts. Once this is completed, check the tension of the derailleur cable and inspect the
wheel.
Lubrication
You must lubricate the pivots of the brake lever every three months. Every time a new brake
cable is installed, it must be lubricated.

COASTER BRAKES

Introduction
Instead of being applied with your hands, coaster brakes are applied using your feet and peda-
ling backwards. The chain transmits the movement of the pedals to the rear wheel hub where
the braking mechanism is located. This braking system consists of:
- Rear hub
- Chain and chainring-crank arm set
Inspection
Once a month, you must make sure the sprocket bolt is tight and the driver system is well fit to
the sprocket.
Once a month, or whenever you replace a wheel, make sure to check the tension of the wheel.
Without proper tension, the chain can fall off, causing the brake to malfunction. Chain ad-
justment is explained in previous chapters.
Removing the rear wheel
- To remove the brake arm, loosen and remove the brake arm bolt.
- To uninstall the hub, loosen the hub bolts gradually in small increments so that the adjustment
of the bearing axis is not affected.
- Slightly loosen the nut on one side of the hub by turning it one quarter of a turn.
- Slightly loosen the nut on the other side of the hub by turning it one quarter of a turn.
- Continue loosening the nuts carefully until you are able to remove them from the hub.
Replacing the rear wheel
- Place the chain on the hub, not on the cog, and slide the hub towards the teeth.
- Push the wheel to the proper position in the rear fork, lift the chain to position it on the cog,
pulling on the wheel to obtain good tension.
- While you are holding the wheel in the frame and maintaining the chain tension, follow the
instructions to remove the wheel backwards, including the gradual adjustment of the bolts.
If necessary, you will have to re-tense the chain.
- Re-install the brake arm, and tighten the brake arm bolt.
- Follow the inspection steps in the wheels section of this chapter to complete installation.
- Spin the wheel to see if it spins freely and is centered.
- Verify that the brake is functioning properly.
Lubrication
Coaster brakes do not need additional lubrication. Follow the recommendations in the Wheels
section for the lubrication of the hub bearings.

7. WHEELS

Introduction
Bicycle wheels allow the bike to travel smoothly; therefore, their integrity is essential. The rela-
tionship between the wheels and the braking system is extremely important.
This section will explain how to inspect, adjust and lubricate the wheels of your bike.
Inspection
The best type of maintenance you can perform on a wheel is preventive. Be aware of any pro-
blems that could arise and correct them before they occur.
Before each use, check that the quick-release is in the Closed position or that the nut is well
tightened. For more information about tightening the wheel, read the corresponding section, or
ask your authorized dealer. Check that the wheels are trued and centered by spinning them. If
the rim spin is not uniform, talk to your authorized dealer. Make sure the wheels are inflated and
the tire pressure is correct. Inflate the tires using a hand pump. Never inflate your tires at a gas
station. Check the tires for wear or any other type of damage. If a tire has any cuts or openings
that allow you to see the inner tube, change it before riding. Check that the wheels are clean. A
dirty or greasy wheel could impede proper brake function. Clean the rims with a clean cloth or
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