Chapter 3. Routine Maintenance
PELLERIN MILNOR CORPORATION
4. Remove the hose and put a cap on the pipe.
To add oil when the oil level is low or after you remove the used oil—
1. Install the hose between the fill point on the tank and the pump on the container with the
new oil. On some machines you add oil through a fill pipe (it can be necessary to remove
the fitting from the pipe). On some machines you remove the breather cap and add oil
there.
2. Add oil until the level is at the full mark on the level gauge.
3. Remove the hose and put a cap on the pipe or breather.
Supplement 7
How to Make Sure That the Hydraulic Oil is Serviceable
Two types of deterioration can occur with the hydraulic oil: contamination and chemical
change. You can usually remove contamination with special filters. To prevent damage to
components (example: rust), it is necessary to replace the oil if a chemical change occurs.
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 8
How to Examine the Hydraulic System for Leaks
WARNING 32 : Poison hazard
—Hydraulic oil that comes out of a leak with pressure can
put a hole in your skin, go into your body, and kill you.
• Do not use your fingers to examine components for hydraulic 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.
— End of BIUUUM09 —
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Summary of Contents for 48040F7B
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