Merida Bike Instructions d'exploitation télécharger pdf (Page 50)

Synchronizing and readjusting

Almost all brake designs have a bolt located next to one

or both brake calipers for adjusting the spring preload

(a)

. Turn the bolt slowly and watch how the gap chang-

es between brake pads and rim.

Adjust the spring in a way that with an unapplied brake

the gaps are equal on either side and the brake pads

touch the rim simultaneously during braking.

The position of the brake lever where the brake starts to

act, also referred to as the pressure point, can be adjust-

ed to the size of the hand as well as to individual conve-

nience by readjusting the brake cable. Make absolutely

sure you cannot pull the brake lever all the way to the

handlebar grip.

With an unapplied brake the brake pads should not be

too close to the rim sides, otherwise they could drag

along the rim during riding. Before doing this adjust-

ment, observe the notes in the chapter “Adjusting the

brake lever reach”.

To readjust the brakes, unscrew the knurled lock ring lo-

cated at the point where the brake cable enters the brake

lever on the handlebars

(b)

. Unscrew the knurled, slot-

ted adjusting bolt by a few turns. This reduces the free

travel of the brake lever.

Keeping the adjusting bolt ﬁrm, tighten the lock ring

against the brake lever unit. This prevents the adjusting

bolt from coming loose by itself. Ensure that the slot of

the bolt faces neither forward nor upward, as this would

permit water or dirt to enter more easily.

Always test the brakes’ function when sta-

tionary

(c)

after adjusting them, making sure

the brake pads engage fully with the rim

when you pull them hard.

Hydraulic rim brakes

Functioning and wear

Common hydraulic rim brakes consist of two brake as-

semblies that are mounted on the left and right side of

the rim and connected by an assembly plate and, if nec-

essary by a brake booster. W Actuating the brake lever

compresses the hydraulic pistons through oil pressure,

pushing the brake pads against the rims.

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Merida Bike Instructions d'exploitation Page 50

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