Road Test Inspection

The Brake System:

Road Test Inspection

Road-test the vehicle and check the operation of the brakes by stopping several times while traveling on a smooth road. Check for squeaking or grinding sounds when the brakes are applied, an excessive amount of pressure required on the brake pedal to stop the vehicle, and the vehicle pulling to one side when the brakes are applied (uneven braking).

If the brakes make a squeaking or grinding sound, some of the more common causes are:
• Glazed or worn lining.
• Lining loose on the brake shoes.
• Dirt embedded in the lining.
• Improper adjustment.
• Brake fluid or grease on the lining.
• Scored brake drums or rotors.

The wheel and brake drum will have to be removed from the noisy brake and the brake parts inspected to determine the exact cause of the noise.

When excessive pressure must be applied to the brake pedal to stop the vehicle, any one or more of the following items may be the cause:
• Glazed or worn brake lining.
• Improperly adjusted brake shoes.
• Dirt in the brake drums.
• Grease or brake fluid on the lining.
• Faulty master cylinder.
• Binding pedal linkage.
• Restricted brake line.

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Article Pages
1. The Brake System
2. Introduction
3. Principles Of Braking
4. Braking Requirements
5. Factors Controlling Retardation
6. External-Contracting And Internal-Expanding Brakes
7. Brake Types
8. Brake Drum Construction
9. Brake Shoes
10. Rotating And Non-Rotating Units
11. Self-Energizing Action
12. Disc Brake
13. Comparing Disc And Drum Brakes
14. Floating Caliper
15. Fixed Caliper
16. Hydraulic Brakes
17. Master Cylinder
18. Wheel Cylinder
19. Hydraulic Brake System Insepction
20. Before Road Test Inspection
21. Road Test Inspection
22. After Road Test Inspection
23. Air-Hydraulic Brake System
24. Air-Hydraulic Master Cylinder
25. Air-Hydraulic Cylinder
26. Air Compressor
27. Air Governor
28. Air-Hydraulic Brake System Components
29. Trailer Coupling Hoses And Connectors
30. Air-Over Hydraulic Cylinder
31. Operation Of Air-Hydraulic Brakes
32. Air-Hydraulic Brakes Of Large Trucks
33. Trailer Air-Over-Hydraulic Brake Systems
34. Air-Hydraulic Brake System Inspection
35. Before Road Test Inspection
36. Air-Hydraulic Brake System Road Inspection
37. Trouble Shooting Air-Hydraulic Brakes
38. Air-Brake System
39. Air-Brake Quick Release Valve
40. Air-Brake Relay Valve
41. Air-Brake Chamber
42. Air-Brake Slack Adjuster
43. Air-Brake Auxiliary Components
44. Semi-Trailer Air Brake Systems
45. Operation Of Straight Air-Brake System
46. Miscellaneous Air-Brake Components
47. Troubleshooting Straight Air Brake Systems

Hot Topics
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-> Replacing brake fluid

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