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| Tech-Article 002 |
Date: 19-Feb-07 |
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The Complete Brake Job...
A Step by Step Approach
What are the different aspects for a complete brake
job? It must be remembered that simply replacing the
pads and shoes may be more cost effective for the car
owner but the most important consideration is providing
the maximum safety in operating the motor vehicle. A
complete brake job will also drastically reduce the
percentage of comebacks or complaints for the installer.The
initial stage of this process is a comprehensive inspection
of the brake system which should include a road test,
if possible. The ensuing stages of a brake job can be
defined as a series of steps which are as follows:
- Replace the front disc pads.
- Replace the rear shoes (or pads)
- Turn or replace the rotor (or drums). It is critical
with this operation to always make sure that you
do not exceed manufacturers' specifications for
Scrap Thickness. The best results are achieved
when a non-directional finish is applied to the
rotor surface after turning.
- Inspect all wheel bearings, races, and seals.
- Replace brake hardware and springs. This is critical
as loose pads reduce brake effectiveness and can
contribute to brake noise.
- Rebuild or replace callipers. Today's brake systems
operate at higher temperatures than in the past
and can easily deteriorate boots and seals. Additional
dirt and corrosion can build up on the piston. These
factors could cause noise, brake drag, or leakage
around the piston seals.
- Rebuild or replace wheel cylinders. As rear shoes
wear, dirt and corrosion can build on the cylinder
cups. This can cause leaks which will likely contaminate
the new brake shoes.
- Replace the master cylinder. This is only required
if during the initial inspection it is determined
that the master cylinder is not operating
in a smooth and proper manner.
- Inspect all brake hoses. Replace them if there
are any leaks or if the outer casing is cracked.
- Inspect all steel brake lines. Check for leaks,
corrosion, or kinks and replace if necessary.
- Drain and replace brake fluid. Brake fluid will
absorb and retain moisture from the air. This moisture
will lower the fluid's boiling point and will promote
corrosion in wheel cylinders and master cylinders.
- Inspect parking brake cables. Ensure the cables
are not "frozen" and lubricate or replace
if necessary.
- Check the brake light actuation. Replace or adjust
the brake light switch.
- Check tyre pressure.
After these steps are completed it is imperative that
the vehicle be road tested to ensure proper function
of the entire brake system.Steps 5 through 14 are not
always considered when doing a "fast" brake
job but by informing the customer of their benefits
you have greatly reduced the potential for serious problems
in the future for them and for you.
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| Tech-Article 002 |
Date: 19-Feb-07 |
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