Milnor M7V4836 Serie Handbuch Seite 47

Chapter 3. Routine Maintenance
Put approximately one pint (one half kilogram) of oil from the drain pipe on the tank in a cup.
When the oil is new, it is transparent, has an amber color and has no contamination. When the
machine operates correctly, the oil can get a brown color. This condition is satisfactory. Speak
to your local hydraulic maintenance company if one or more of these oil conditions occur:
• not transparent
• a brown to black color
• a gray to white color
• particles or bubbles
• a sour or burned odor
Give the hydraulic company a sample of the oil to examine. They can identify the type of
deterioration and tell you the correct procedure. If it is possible to use special filters to remove
the contamination, they can supply the necessary equipment.
Supplement 10
How to Examine the Hydraulic System for Leaks
A leak in the hydraulic system can be an oil leak or an air leak. If oil comes out with pressure,
you will usually see an oil stain or an area where oil collects on a machine surface. The usual
symptoms of an air leak are:
• The oil in the tank will have air bubbles.
• The machine will make the sound of ball bearings in a pipe when the hydraulic system
operates.
It is necessary to repair a hydraulic leak. Speak to your dealer or Milnor. This is not routine
maintenance.
PELLERIN MILNOR CORPORATION
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