Which locations require lubrication for smooth operation?

• A. Cab Lubrication Points
• B. Coolant Pressure Cap
• C. Pressure Testing
• D. Indicator Lights

Answer: (A)

Lubrication is applied where moving joints and pivot points operate, to reduce friction, wear, and noise and to keep mechanisms functioning smoothly. In the cab, components such as door hinges, latches, seat tracks, pedal pivots, and other moving interfaces require periodic lubrication so they move freely and don’t bind or creak.

The coolant pressure cap belongs to the cooling system and isn’t a lubrication point. Pressure testing is a diagnostic procedure to check system integrity, not a lubrication activity. Indicator lights are electrical indicators and have no lubrication requirement. Therefore, the locations that require lubrication for smooth operation are the cab lubrication points—the places where moving parts reside within the cab.