Brake System

LIQUID BRAKES
 

The braking system is an important safety system for a vehicle. Inspection level or quantity of brake fluid content is an important issue and it is easy to do. 

Brake fluid stored in the reservoir / reservoir which is installed on the master cylinder (master cylinder). Every time we open the hood (bonnet front) we will see the brake fluid reservoir.

Liquid Brake

Since 1980, there have been a lot of brake fluid reservoir is made of translucent plastic (translucent plastic).  

Thus for inspection level / liquid level can be done through the reservoir body without opening the lid.  

Usually the reservoir body was marked with the words FULL and ADD or MAX and MIN.

All brake fluids are classified by the Department of Transportation (DOT) and are marked with numbers DOT 3, 4 and 5. In the selection of the correct fluid to a vehicle is not subject to DOT 3 is nice, DOT 4 and DOT are nicer 5 most good. 

In the domestic market more determined DOT 3 and DOT 4 is suitable for vehicles but FORD company named DOT 3 as heavy-duty variation due to higher quality of manufacture.  

In terms of the manufacturing process, DOT 3 and DOT 4 fluids called polyglycol. DOT 5 more to silicon. In car manufacturing now there is no suitable braking system and meets the characteristics for DOT 5.  

However, all three types of brake fluid are suitable for brake system but not to be mixed in a brake system.  

Liquid Brake Timetable

The brake fluid should be changed every 18-24 months or between 30000 to 40000 km.
 

Features Of Brake
  

1.Unable to compress  

2. No foaming  

3. Not condense in high temperature  

4. Not corrosive part of metal
  

5. Not harden or gentle materials and brakes as enacted by
rubber.  

6. Acting as a lubricant  

7. Anti rust brake components  

8. Not easy to freezing

BRAKE FLUID PROPERTIES  

1. Not foaming  

2. Not be compressed

3.  Anti rust brake components  

4. Not acting on rubber brake system
   

5. Anti steam process in high temperatures boiling  

6. Thermo stable

REEL @ DRUM BRAKE TYPE

• Brake type trailers are commonly used on the rear brakes of the vehicle in question with disk brakes front of it.

  • Older cars usually use four drum brakes

  • The brake stops the rotation of the drum and the friction between the wheels through the drum brakes.

•Surface smooth and flat.

Drum Brake

•Lining brake drum mounted on a shoe that can rub against the drum.

•Among the shoe brake cylinder wheel (wheel cylinder) which pushes the brake shoe to avoid contact with the brake drum.

There are also other components such as: -

Return spring - acts as a brake shoe attractive original place after the brake pedal is released.  

Adjuster - to adjust the clearance between the lining and the drum surface or to make adjustments hand brake.  

The locking pin - to set / lock brake shoe position on the backing plate

brake

 

Wheel cylinder
 
It is used in hydraulic brake. He developed a brake shoe out to make contact with the spindle, this pressure will be applied when the brake pedal is stepped on. 

There in the wheel cylinder piston with one or two bowls of rubber (rubber cup). Among the piston is inserted spring.

This spring will return the piston to the place of origin after the operation. 

There is also the cylinder bleeder screw (bleeding screw) for the purpose of removing air trapped in the brake system.  

Guard dust (dust cover) of the outer cylinder fitted to prevent impurities into the cylinder.  

Cylindrical wheel (wheel cylinder) is commonly used for drum-type brakes (drum).

wheel cylinder

wheel cylinder picture

 

BRAKE LINING
 
Brake shoe lining is mounted on the brake (brake shoe) using two methods, namely by means of riveted and heat resistant glues.  

Brake lining made of asbestos that can withstand the heat and friction

brake lining

 

Brake Lining structure
 
For wheels that use different types of drum brakes typically use two brake lining called primary and secondary lining or both secondary.  

The composition of the primary and secondary brake lining using a cylindrical wheel mounted right in the middle between the primary and secondary lining.  

When the brake pedal is pressed the wheel cylinder piston pushes the brake lining and contact with the surface of the drum.  

brake diaphram

Primary brake lining usually experience more pressure than the secondary brake lining. That why primary brake becoming thin frequently.  

This type is usually used on the rear wheels, braking ability is quite weak compared with two secondary lining.
 
While two secondary brake lining using two separate wheel cylinder on one wheel along with the adjusting unit at each brake lining.  

Both brake lining moves in the direction of drum rotation, with this will result in a more gripping power braking.  

The weakness of this type is that both the brake lining will act as the primary brake lining while the vehicle is reversing.

DRUM
 
Made of cast iron and aluminium or iron castings.  Steel used as the drum surface only.
Many drum brakes are now using this type of cast iron and steel.  

This is because the steel is more robust and cast iron is durable and of high quality and can conduct heat quickly.  

During operation drum brakes will be hot, fatherly conduct heat to the air that forms the    outer surface of the drum is usually made fins (not on all vehicles) and the hollow wheel rim is used.

Drum Brake