Pre-Trip Inspection – Engine Compartment

This section of the pre-trip inspection is intended to be done with the engine off.

Check for Leaks, Condition of Hoses

• Look for puddles on the ground that would indicate a leak.
• Look for dripping fluids on the underside of the engine and transmission.
• Inspect hoses for “good” condition and leaks.

Oil Level

• Indicate the location of dipstick.
• Make sure the oil level is within safe operating range and above the refill mark.

Coolant Level

• Inspect the coolant level by either:
  a) Checking the reservoir sight glass, or
  b) Removing the radiator cap if the engine is not hot and visually checking the coolant level.

Power Steering Fluid

• Indicate the location of the power steering fluid dipstick.
• Confirm that there is an adequate power steering fluid level that is above the refill mark.

Engine Compartment Belts

• Check these belts for cracks, frays and snugness (at most 3/4 inch play at center of belt):
• power steering belt
• water pump belt
• alternator belt
• air compressor belt

If any of the components mentioned above are not belt driven, you must make sure that the component(s) are operating properly, are not damaged or leaking and are mounted securely.

The Five (5) Components of the Pre-Trip Inspection

1. Engine Compartment

2. Cab Check and Engine Start

3. Brake Check

4. External Cab

5. Trailer (for Bobtail trucks)

Study and Training Guides

• Download the 5 Components of the Pre-Trip Inspection
• Pre-Trip Inspection Study Guide... learn exactly what you need to pass the exam!
• California DMV Commercial Driver License Handbook

Study and Training Guides

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