Merida City Bikes, Руководство по эксплуатации

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62
a
b
c
d
Headset
The headset (a) connects the fork to the frame, but al-
lows it to move freely. It must afford virtually no resis-
tance to moving, if your MERIDA bike is to go straight,
stabilizing itself as it runs. The shocks caused by uneven
road surfaces expose the headset to considerable levels
of stress. In this way it can become loose and malad-
justed.
G
Riding the bike with a loose headset greatly
increases the stress on the fork and the bear-
ings. This can lead to damage to the fork. Risk
of an accident!
Checking and readjusting
Check the headset for play by placing your fingers
around the upper head tube race
(b)
. Bring your weight
to bear on the saddle, pull the front brakes with your oth-
er hand and push the MERIDA bike firmly back and forth
with the wheel remaining on the ground. If the bearing
has play, you will feel the upper head tube race moving
in jerks relative to the lower head tube race - visible as a
small gap in between the head tube races
(c)
.
To check the bearing for ease of running, lift the frame
until the front wheel is suspended in the air
(d)
. The han-
dlebars should turn from far left to far right without feel-
ing roughness or tightness at any point. With a gentle
tap on the handlebars the fork should turn easily from
the middle position.
If you face any problems during the test, contact your
MERIDA dealer.
G
Adjusting the headset requires a certain
amount of experience and should therefore
be left to your MERIDA dealer.
Threadless headsets – Aheadset
®
This headset system is characterized by the fact that the
stem is not in the fork steerer tube but clamps it from
outside. Hence the stem is an important constituent part
of the headset, clamping it therefore also sets the adjust-
ment. You generally only need one or two Allen keys
and a torque wrench to adjust an Aheadset
®
.
Release the clamping bolt(s) located on the side of the
stem by one to two turns. Gently tighten the counter-
sunk adjusting bolt on top a little, e.g. by a quarter turn,
by using an Allen key.
Align the stem so that the handlebars are not slanted.
Make sure the front wheel is in line with the top tube and
the stem. Tighten up the stem clamping screws. Use a
torque wrench and never exceed the maximum torque
values! You will find the prescribed values in the chapter
“Recommended torque settings”, directly on the com-
ponents and/or in the operating instructions of the com-
ponent manufacturers on this MERIDA CD-ROM.
Check the headset for play as described above. Take
care not to tighten the bearing too much, as this could
easily destroy it.