If your truck's air compressor has its own oil supply, when should you first check the oil level?

If your truck's air compressor has its own oil supply, when should you first check the oil level?

• A. before driving
• B. after driving for two hours
• C. while braking
• D. when the oil light comes on

Answer: (A)

When the air compressor has its own oil supply, you should check the oil level before you start driving. Having the right amount of oil before the compressor begins to run helps prevent overheating and seizure, which could compromise the air brake system. If the level is low, top it up with the recommended oil while the engine is off and the system is cool, then recheck. Relying on an oil light isn’t a reliable method for the compressor’s oil, and checking during braking or after hours of driving doesn’t give you an accurate reading. Checking before driving ensures the system is properly lubricated from the start.

When the air compressor has its own oil supply, you should check the oil level before you start driving. Having the right amount of oil before the compressor begins to run helps prevent overheating and seizure, which could compromise the air brake system. If the level is low, top it up with the recommended oil while the engine is off and the system is cool, then recheck. Relying on an oil light isn’t a reliable method for the compressor’s oil, and checking during braking or after hours of driving doesn’t give you an accurate reading. Checking before driving ensures the system is properly lubricated from the start.