1. © 2006 PSEN Unit – 3 Inspection & Dynamics The inspection process may seem routine but every trip changes things. Always inspect carefully.

2. © 2006 PSEN 1.Understand the value and importance of regular inspections of emergency vehicles. 2.Identify the major component system of an emergency vehicle. 3.Understand how to perform pre and post-trip inspections. Inspections & Maintenance Objectives

3. © 2006 PSEN 4.Understand the various classes of PM and the importance of a PM program for emergency vehicles. 5.Recognize the role of the driver in inspections and maintenance. 6.Understand the importance of keeping accurate and complete records. Inspections & Maintenance Objectives

4. © 2006 PSEN Types of Preventative Maintenance Routine Maintenance Scheduled Maintenance Crisis Maintenance

5. © 2006 PSEN Vehicle Inspection

6. © 2006 PSEN Inspections – Pre-Trip –Vehicle overview –Check engine compartment –Start engine and check inside cab –Check headlights, signal lights, warning lights and audio devices –Conduct walk around inspection –Check controls and indicators –Check brake system (air brakes)

7. © 2006 PSEN Check the Log Maintenance Records Operational Records

8. © 2006 PSEN Chassis Frame Suspension System Steering & Braking System Power Train Components Emergency Vehicle Components

9. © 2006 PSEN Suspension Systems 1.Axles 2.Springs 3.Wheels Vehicle Characteristics

10. © 2006 PSEN Lubrication Oil (Engine) Tires Steering System Belts Tools, Appliances, and Equipment Role of the Emergency Vehicle Driver

11. © 2006 PSEN Role of the Emergency Vehicle Driver Battery or Batteries Coolant System Electrical System Fuel Hydraulic Fluids Braking System

12. © 2006 PSEN Braking Systems –Anti-Lock Braking System (ABS) –Secondary or Auxiliary Braking Systems Engine Brake Automatic Transmission Retarder Driveline Retarder Vehicle Characteristics

13. © 2006 PSEN Routine –Fluid level checks –Wheels and tires –Electrical system and devices Types of Preventative Maintenance

14. © 2006 PSEN Vehicle Inspection 4/32” Front tires 2/32” Rear tires

15. © 2006 PSEN Vehicle Inspection

16. © 2006 PSEN Preparing to Drive Effective Start-Up Procedures –Circle of Safety Inspection –Adjustment of cab features –Wearing of occupant restraints –Receive signal before moving

17. © 2006 PSEN Document the need for maintenance on the assigned vehicle Verify that the request and needed maintenance was performed. Role of the Emergency Vehicle Driver

18. © 2006 PSEN Scheduled –Manufacturer's recommended schedule –Amount of use –Organizational policy –Professional standards Types of Preventative Maintenance

19. © 2006 PSEN Vehicle Forces and Dynamics

20. © 2006 PSEN Understand the physical forces which act upon vehicles and their impact upon vehicle handling. Recognize that certain vehicle characteristics can influence the impact of physical forces on emergency vehicles Vehicle Dynamics Objectives

21. © 2006 PSEN Friction Velocity Momentum Inertia Centrifugal Force Physical Forces

22. © 2006 PSEN Total Weight and Weight Distribution Suspension system Braking system Baffling system Vehicle Characteristics

23. © 2006 PSEN Total weight and weight distribution. –Gross Axle Weight Rating (GAWR) –Gross Vehicle Weight rating (GVWR) –Weight Distribution – horizontal & vertical centers of gravity Vehicle Characteristics

24. © 2006 PSEN Momentum – is measures as the product of the object’s mass or weight times its velocity Inertia – is the force it takes for a moving object to stay in motion in the same direction Physical Forces

25. © 2006 PSEN Physical Forces Directional Control is a derivative of three (3) factors »Steering »Turning »Tracking Directional Control is a derivative of three (3) factors »Steering »Turning »Tracking

26. © 2006 PSEN Centrifugal Forces

27. © 2006 PSEN Friction – resistance to motion between two moving objects that touch. Tire/Road Friction Brake Friction Steering Friction Physical Forces

28. © 2006 PSEN Tire Blowout

29. © 2006 PSEN Velocity – Velocity is Speed »Acceleration »Deceleration »Braking Physical Forces

30. © 2006 PSEN Braking & ABS Acceleration Deceleration Braking

31. © 2006 PSEN Post Trip Considerations

32. © 2006 PSEN –Cleaning of the vehicle –Replacing supplies –Re-fueling and checking fluid levels –Report any unusual occurrences or malfunctions. Inspections – Post-Trip

33. © 2006 PSEN Unit – 3 Inspection & Dynamics