There are five types of automotive braking systems. These
systems are electromagnetic, friction, hydraulic, pumping, and servo. We will
be focusing on indicators of problems within a hydraulic braking
system. When you apply your brakes the force exerted by your foot is
increased by hydraulics. Applying the brakes forces brake fluid through the
brake lines. The fluid in the brake lines activate pistons attached to the
calipers. The caliper piston (slave piston) causes the brake pads to
exert pressure on a disc or drum. This action creates friction slowing or
stopping the vehicle.
Soft Brakes
You are driving the Evergreen State when your brakes start to feel spongy. Soft
brakes are an indication that hydraulic pressure is being lost to a leak in the
braking system. A rupture in a brake line is one possible cause. Before you
start searching for any hydraulic hoses tacoma
wa explore these possibilities.
The master cylinder is usually located on the firewall. Inspect the outside of
the cylinder for signs of brake fluid. Also, check the fluid level within the
master cylinder. Add brake fluid if necessary and bring the pressure back up by
pumping the brakes.
A seal going bad is a common cause of brake leaks. If there is a leak where the
lines meet the caliper you will find fluid on the back of one or more of your
wheels. System leaks or any issue with your brakes are not to be ignored.
Grinding
If grinding occurs when the brakes are applied the car should be parked until
the problem is fixed. During slowing or stopping brake pads clamp onto the
brake rotors or push out on the brake drums. When the brake pads are completely
worn out the pad’s metal backing begins rubbing against the brake rotor or
brake drum. Besides being dangerous driving when the brakes are metal to metal
will create the added expense of replacing rotors or drums.
Squeaking
Inexpensive poorly made brake pads that constantly rub against the rotors are
one source of squeaking brakes. Sometimes, brakes squeak by design. Brake pads
may contain a wear indicator that squeaks when it makes contact with the rotor
or drum. That squeak means it is time to replace your brake pads.
Thumping
Thumping noise in the brakes is most likely attributable to warped brake drums.
Brakes work on friction and friction generates heat. Brake drums are metal and
when metal cools too rapidly it warps. Cold water from puddles splashing onto
the brake drum can cause warpage.
Brake Over Heating
When brakes become overheated they can start to smoke. Overheating can be the
result of heat damage to the pads or fluid leaking onto the pads. Fluid on the
pads creates a residue that that reduces friction between the pad and caliper.
To safely cool down overheated brakes spend five minutes driving
the car slowly enough that the car can coast to stop.