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What is the most important reason for doing a vehicle inspection?
Safety
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What things should you check during a trip?
- Tires, wheels, and rims.
- Brakes.
- Lights and reflectors.
- Brake and electrical connections to trailer.
- Trailer coupling devices
- Cargo securement devices
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Name some key steering system parts.
(See figure 2.1 on page 37)
- Steering wheel
- Steering shaft
- Gear box
- Tie rod
- Hydraulic fluid reservoir
- Pitman arm
- Drag link
- Steering knuckle
- Spindle
- Steering arm
- Power steering cylinder
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Name some suspension system defects.
(See figure 2.2 on page 37)(See figure 2.3 on page 37)(See figure 2.4 on page 37)
- Spring hangers that allow movement of axle from proper position.
- Missing or broken leaves in any leaf spring. If ¼ or more are missing it will put the vehicle “Out of order”, but any defect could be dangerous.
- Broken leaves leaves in a multi-leaf spring or leaves that have shifted so they might hit a tire or other part.
- Leaking shock absorbers.
- Torque rod/ arm, u-bolts, spring hangers, or other axle positioning parts that are cracked, damaged, or missing.
- Air suspension systems that are damaged and/ or leaking.
- Any loose, cracked, broken, or missing frame members
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What three kinds of emergency equipment must you have?
- Fire extinguisher
- Spare electrical fuses
- Warning devices for parked vehicles
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What is the minimum tread depth for front tires? For other tires?
 - inch tread depth in every major groove on front tires. - You need 2/32 inch on other tires.
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Name some things that you should check on the front of your vehicle during the walk around inspection.
- Condition of the front axle.
- Condition of the steering system
- ---No loose, worn, bent, damaged or missing parts.
- ---Must grab steering mechanism to test for looseness
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What should wheel bearing seals be checked for?
That they are not leaking
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How many red reflective triangles should you carry?
Three
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How do you test hydraulic brakes for leaks?
- Pump the brake pedal three times.
- Then apply firm pressure to the pedal and hold for five seconds.
- The pedal should not move.
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Why put the starter switch key in your pocket during the pre-trip inspection?
This one should be common sense
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