The oil level in the vertical motor sight glass should be within what range?

The oil level in the vertical motor sight glass should be within what range?

• A. Low
• B. Normal/Acceptable range
• C. High
• D. Critical

Answer: (B)

Keeping the oil level in the vertical motor sight glass within the normal/acceptable range ensures the bearings stay properly lubricated and cooled. The oil forms the protective film and helps seal the shaft; staying in the middle range provides a reliable supply of lubrication and prevents air from entering the bearing cavity. If the level is too low, bearings can run dry, overheat, and wear quickly. If the level is too high, oil may leak or foam and cooling/ sealing effectiveness can suffer. The normal range is the safe, balanced point for reliable motor operation.

Keeping the oil level in the vertical motor sight glass within the normal/acceptable range ensures the bearings stay properly lubricated and cooled. The oil forms the protective film and helps seal the shaft; staying in the middle range provides a reliable supply of lubrication and prevents air from entering the bearing cavity. If the level is too low, bearings can run dry, overheat, and wear quickly. If the level is too high, oil may leak or foam and cooling/ sealing effectiveness can suffer. The normal range is the safe, balanced point for reliable motor operation.