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Wednesday

Brake System Servicing?

Bleed and Flush Brake System.

Many a times the Driver notice problem with brake system.The brake pedal gets hard or very loose spongy.Brake pedal goes all the way down to the floor.
This is indication of problem with brake System.
In this cases the Brake lines needs to be cleaned and Serviced.

How Exactly The Brake System Works?
There is a brake Fluid.Its a Hydraulic based Brake fluid.
This brake fluid transfer force from the brake pedal to the brake caliper or the wheel cylinder.

What happens if Brake Fluid is dirty?
In most of the brake failure issues,the cause of the problem is dirty or contaminated brake fluid.
The brake fluid has to be replaced regularly as per the service intervals.

Why to Replace Brake fluid?
The Moisture and other dirt gets collected and settled in the brake lines by time.
The brake system fluid change remove moisture, air and containment's from the braking system. Moisture is the leading cause of brake system operation failure.
Also replacing the brake fluid makes the braking system more fluent and easy.Brake fluid is subject to extreme pressure and heat so the boiling point of brake fluid is important.Higher boiling points (severe duty) and Anti-Lock braking systems require higher quality brake fluid; this fluid must also have a very low freezing point.Then only you get exact brake ability and brake function.

Also use brake fluid that is recommended by dealer and also mentioned in service manual.Dont use low quality or non branded cheaper quality local brake fluid.This fluids are less by cost ,but can damage the brake system.The brake fluid should have proper boiling ability,local brake fluid dont have this ability and so dont last long and this not at all helps in lubricating internal brake system parts.

Always add and flush your brake system with the manufacturers recommended brake fluid or you get get correct brake fluid for your car from your car dealer. Please be careful all brake fluid is corrosive.Be very careful when handling brake fluid.

What basic care should be taken while dealing with brake Fluid?
While Flushing or replacing brake fluid,you can very hand gloves.Keep basic tap water filled jug ready.If in case any brake fluid is spilled or sprayed on your hand or got in contact with skin,then immediately clean he skin with normal water.While replacing brake fluid,use a sealed container and dont let any moisture to enter the brake system.If in case moisture is entered then get the system flushed to remove the dirt and moisture out,after the brake fluid is filled.Once the brake system is properly flushed the brake system bleed procedure is performed.This system releases the unwanted air from the system,so that exact brake fluid pressure remain in the system.If there is Air in the brake lines then brake pedal will not behave properly.You will notice loose or very hard brake pedal.Also when pressing the brake pedal,the car will not stop completely.
Once the brake bleed procedure is done,check the brake pedal operation,if its not functioning right,then recheck the brake system and braking parts again.Dont drive the car till the brake pedal is functioning right.

If you notice brake fluid is leaking,then inspect brake master cylinder.In most cases brake fluid leaks ue to faulty master cylinder.

Fill the brake fluid to its correct full level.

How to remove the brake fluid?
To remove the brake fluid there is a tool available at local auto part stores.To replace brae fluid just remove the cap from brake reservoir and insert the brake fluid removal tool in the reservoir.Its a tube like tool, which will easily get into the reservoir.Then just remove the most of brake fluid out of the reservoir and collect the old brake fluid in a empty pan.
Once the fluid stops getting pulled out of he reservoir,now start filling the manual recommended brake fluid in the master cylinder.
The master cylinder will get filled to full level in some time,after that loosen the brake bleeder screws.This bleeder screws are located on the brake calipers or on wheel cylinders.There are basically 4 brake bleeder screws.
Now for further part of procedure,you will need one helper.Get the brake pedal pressed down completely,now quickly tighten the bleeder screws and tell the helper to release the brake pedal.
The brake pedal will slowly return to its actual position and new fluid will enter to the master cylinder body.
Once the pedal is come up,repeat the same procedure till you see clean brake fluid at all bleeders.

How the clean brake fluid will enter the Bleeder?
When you press the brake peal with bleeder screw loose,the dirty brake fluid spill out.Then you close the bleeder screw and brake pedal comes up.When brake pedal is coming up,it is pulling the good fluid,which you filled in the master cylinder.Again once the brake pedal is up,you repeat the same procedure of loosening the bleeder screws,now again press the brake pedal completely,then close the bleeder screw ,the brake pedal will come up.
When you notice that clear brake fluid is coming out of all 4 bleeder valves when you depress brake pedal,then its confirmed that new brake fluid is entered the brake system and brake lines.

Once this procedure is done,you have to refill the master cylinder to its correct level.Because the fluid which you fill first time in master cylinder has not entered the brake lines,when you did brake bleed / fill procedure.
So master cylinder fluid level is low,therefore fill the master cylinder again with correct fluid to its required level.

Please Help The brake bleeder screw is very tight and not coming out?
This problem is seen many a times.A client complaints about brake bleeder screw getting very tight and not getting loose.
All bleeder screws seal against a taper fit seat in the brake wheel cylinder or caliper to create the valve.This helps to controls brake fluid flow. So its always advisable that you use WD-40 Spray or other similar rust removal spray when loosening a brake bleeder .This spray is aid to dilute the rust which makes the screw tight and not let it to get loose.

Please Help,Brake fluid is not coming out of One Bleeder Valve,but its coming out of other 3 Bleeder valves?

When brake fluid bleed procedure is performed the brake fluid not getting bleed from one or two bleeder valves.This complaint is very common by many of out clients.
This is nothing to worry.The brake fluid bleed or fill procedure is not done regularly,this causes the bleeder valve hole and brake lines to get clog and fill with dirt and contaminated.Due to this brake fluid will not flow fluently when pressing the brake pedal.In this case try this basic  procedure.
Only open the plugged bleeder and let the other 3 or 2 bleeder  closed and now  press the brake pedal down. This will create additional pressure from the other bleeders being closed,and force the fluid out of the plugged bleeder. Once the bleeder has become unplugged finish the bleeding procedure until clean fluid is present. Then close the bleeder and release the brake pedal slowly.


This will help you to understand the Brake System.


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