Bedienungsanleitung Stevens Allround Trekking Bikes - 2014 (Seite 48 von 83) (Englisch)

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8. The Headset

The headset connects fork, stem, handlebars and front wheel to the

frame, but allows them to turn freely as a unit. It must turn with vir-

tually no resistance, if the bicycle is to run straight, stabilising itself as

it travels. Shocks caused by uneven road surfaces expose the headset to

considerable levels of stress. It may therefore happen to become loose

and maladjusted.

8.1. Checking the Bearing Play

• Check the headset for play by placing your fingers around the upper

head cup.

• Pull the front brakes with your other hand and push the bicycle firmly

back and forth with the wheel remaining on the ground.

• If there is play in the bearing, the upper head cap will move noticea-

bly relative to the lower cup and you will feel a jerk.

• Another way to check the headset is to lift the front wheel a little off

the ground and then let it drop. If there is play in the bearing, you will

hear a rattling noise in this area.

• To check the bearing for ease of running, lift the frame until the front

wheel no longer touches the ground. Move the handlebars from the

left to the right. The front wheel should turn very easily from far left

to far right and back without catching anywhere. A light tap on the

handlebars should be enough to turn the wheel to the side.

8.2. Adjusting Conventional Headsets

For the adjustment of conventional headsets you need to flat, open-end

wrenches. Depending on the diameter of the headset the width of the

open-end wrench is 32 millimetres at least.

• Hold the front wheel tight between your legs, apply the wrench and

release to top counter nut.

• Turn the lower bearing cup race a little downwards. Do not tighten

the bearing cup race! This could damage the bearing immediately.

• Keep the bearing cup race tight with a wrench to maintain the ad-

justment. Tighten the counter nut with the second open-end wrench

against the bearing cup race.

• Check it again for play. If the fork cannot be turned without any

resistance and play, the bearing is improperly adjusted. Adjust the

bearing play once again. This procedure of adjusting can take several

attempts. The important thing is that the bearing turns without any

resistance and play. This is the only way to ensure a long service life.

The Headset

Danger:

Riding the bike with a loose

headset increases the stress

on fork and bearing. This

can result in fork breakage

with severe consequences!

Caution:

Adjusting the headset

requires a certain amount

of experience and should

therefore be left to your

STEVENS dealer. If you want

to try it on your own, be

sure to read the operating

instructions of the head-

set manufacturer on the

STEVENS CD-ROM before

doing any adjusting.

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