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TROUBLE SHOOTING OF LUBRICATION STYSTEM

 The commonly occurring troubles in the lubricating system are unduly low or excessively high oil pressures.

Low oil pressure

  • Low oil level, which may be checked by the dipstick. Fill till the correct level or to Crankcase.
  • The oil may have been diluted with constant use, which has to be changed.

High oil pressure

  • The oil used may be of too high a viscosity, which may be drained out and the oil with correct viscosity filled in.
  • The oil lines, galleries may be clogged, which may be cleaned.
  • Oil pressure gauge may be defective which may be inspected and repaired.

Grades of Engine oil:

  • The Society of Automotive Engineers (SAE) developed a scale for both engine (motor oil grades) and transmission oils.
  • Viscosity is notated using the common classification “XW-XX”.
  • The number preceding the “W” (winter) rates the oil’s flow (viscosity) at zero degrees Fahrenheit (-17.8 degrees Celsius).
  • The lower the number, the less the oil thickens in cold weather. 
  • The numbers “XX” indicate viscosity at 100 degrees Celsius and represent the oil’s resistance to thinning at high temperatures.
  • For instance, oil with a 5W-30 grade thickens less than oil with a 10W-30 grade in cold weather. 
  • Oil with a 5W-30 grade thins out more quickly at high temperatures as compared to oils with a 5W-40 grade.

Few grades of Engine oil are as follows:

    • 0W-20
    • 0W-40
    • 5W-30
    • 5W-40
    • 10W-30
    • 10W-40
    • 15W-40
    • 20W-50 
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