2. CONTEXT:
Principle
Braking Requirements
Purpose & Location Of Brakes
Construction
Method Of Actuation
Anti-Braking System
RequirementOf Brake fluid
Brake Maintenance
Trouble Shooting
3. PRINCIPLE:
Brakes are required to stop the vehicle within the smallest possible distance
by converting the kinetic energy into the heat energy which is dissipated
into atmosphere.
5. Purpose & Location Of Brakes:
Service Brakes
Parking Brakes.
Transmission
Wheels
6. CONSTRUCTION:
DRUM BKAKES:
Attached concentric to axle hub
Casing is mounted on back plate
Protects the drum and shoe
assembly
from mud and dust
It absorb complete torque so
called as
torque plate
Anchored at one end and force is
applied on other end by actuating
mechanism which forces the brake
shoe against revolving drum thereby
applying the brakes.
7. DISC BRAKES:
Consists of cast iron disc bolted
to wheel hub & stationary
housing called caliper
Connected to stationary part
and cast into two parts each
containing piston
Friction pads are held b/w
piston and disc
Hydraulically actuated pistons
moves the friction pads into
contact with the disc
Rubber sealing rings act as
return springs
8. METHOD OF ACTUATION:
Mechanical brakes
Hydraulic brakes
Electric brakes
Vacuum brakes
Air brakes
12. Requirement Of Brake fluid:
• Boiling point
• Viscosity
• Lubrication properties
• Effect on rubber
• Corrosive action
• Storage stability
13. Brake Maintenance:
Periodic checking
Topping the level of brake fluid
Adjustment of brakes to compensate wear of brake lining
Lubrication
Changing of rubber cups and seals
14. Trouble Shooting:
• Loss of braking efficiency
• Brake fade
• Brakes binding
• Brakes overheating
• Brake judder
• Vehicle pulling to one side when brakes applied
• Grabbing brakes
• Hand brakes ineffective
• Excessive loss of brake fluid
• Presence of air in the braking system