15
BRAKING SYSTEM SYSTÈME DE FREINAGE Wheel Brake Cylinders
Cylindres de frein de roue
A wheel cylinder is a component in a drum
brake system. It is located in each wheel
and is usually at the top, above the shoes.
Its responsibility is to exert force onto the
shoes so they can contact the drum and stop the vehicle
with friction.
What connects these wheel cylinders to the shoes are
usually small rods shaped like a birds beak. It is very
similar to a master cylinder and functions in pretty much
the same way, consisting of just a simple little plunger
on the inside. On older vehicles, these will begin to leak
and hinder the performance of the brakes, but are
normally inexpensive and easy to replace.
The wheel cylinder consists of a cylinder that has
two pistons, one on each side. Each piston has
a rubber seal and a shaft that connects the piston
with a brake shoe. When brake pressure is applied, the
pistons are forced out pushing the shoes into contact
with the drum. Wheel cylinders must be rebuilt or
replaced if they show signs of leaking.
Le cylindre de roue est l’élément qui permet
de transformer l’énergie hydraulique en énergie
mécanique dans un système de freins à tambours
sur une voiture.
Ce cylindre comprend 2 pistons recouverts par des caches
poussière qui viennent actionner les 2 mâchoires de frein
pour les mettre en contact avec le tambour.
Ce cylindre peut se gripper ou se mettre à fuir. Si du liquide
de frein est visible autour ou en touchant au cache poussière,
le cylindre de roue est hors-service, il est conseillé de les
changer par paires car si l’un est arrivé au bout, l’autre n’est
sûrement pas loin ou peut-être pire.
FACTS
FAITS
source:
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6914
Brake lathe bits
Couteaux pour tour à freins