
8
A signicant drop in oil level means there is an oil leak or that an exhaust lter is broken, and the pump should be smoking excessively.
It is normal for the oil to be foamy and light in color in an operating pump. However, if the oil is milky colored, it is an indication
that water is present in the oil. Normally, by operating the pump for an extended period, with the inlet suction blanked off and the gas
ballast (Ref. 440) open on ORV pumps, the water will be purged from the oil. If the oil is dark colored, it is contaminated or carbonized
and must be changed. Depending on the severity of the contamination, a thorough ushing may be needed. Contact the IN-ECO
company for ushing oil (OV 568) and refer to Section 3.1.4 for the ushing procedure.
3.1.2 Oil Type and Quantity
See Section 1.5 - Oil Filling for details on oil type and quantity.
3.1.3 Oil and Filter Change
CAUTION: When changing the oil and lters, it may be necessary to ush the pump to remove any
build-up of degraded oil from the sumps, oil lines, radiators, etc., to ensure proper oil ow through
the pump. Reduced oil ow, especially through radiators and cooling coils, can cause mechanical
damage or extreme overheating, which could cause the oil vapors to ignite.
WARNING: Always take the necessary precautions concerning personal protective equipment
when changing oil and make sure the pump is switched to „off“ so that accidental starting will
not occur. Oil temperature can reach 100 °C and may pose a danger of scalding.
See Section 1.5 and the Technical Data on page 14 for details on oil type and quantity.
Check the oil for contamination on a weekly basis by shutting the pump off and draining some of the oil into
a small glass or a similar transparent container through the oil drain port (Ref. 95).
Oil life is dependent upon the conditions to which it is exposed. A clean, dry air stream and an oil operating temperature under 99 °C
are ideal conditions. When using OV530 (hydrocarbon oil), it is recommended that oil changes are made every three (3) to four (4)
months or 500 to 750 hours of operation, or as necessary if high heat is contaminating the oil. The use of OV570 (synthetic) or OV590
(semi-synthetic) oil may signicantly extend the operating hours between oil changes under ideal conditions. However, you may need
to ush out the pump before changing. Contact the factory Service Department for advice. Oil samples should be taken regularly when
exceeding the 500-750 hour recommendation.
Excessive Heat
When the pump is subjected to operating conditions that will cause the oil to be heated above 99 °C, the oil will carbonize and become
contaminated after a relatively low number of operating hours. The higher the temperature, the quicker the oil becomes contaminated.
If the oil temperature is too severe, OV570 (synthetic) or OV590 (semi-synthetic) oil should be used to withstand the elevated tempera-
tures. If synthetic oil is used, the pump should be ushed with OV568 oil. Contact the factory for instructions on the ushing procedure.
Auxiliary oil cooling is the most practical approach to a severe heating problem.
Contaminated Air Stream
When the air stream contains a solid and/or liquid that can contaminate the oil, it must be changed more often. If the air stream con-
tains a small percentage of contaminates and/or they are slightly aggressive* (mild acids, etc.), synthetic oil, such as OV570, will resist
breakdown better than the standard OV530. The solution is to install a lter or knock-out pot to keep the contaminates out of the pump.
*Process air streams with a large percentage of contaminates and/or more than slightly aggressive contaminates must use a chemical duty pump.
Oil change intervals can only be established by experience with the pump operating in the actual conditions (see previous paragraph
for some of the conditions). Develop the oil change interval by periodically checking an oil sample removed from the pump. When the
oil sample has become dark in color (from solids and carbonized particles) or is milky looking (from water), it is time to discard it. As
mentioned before, a thorough ushing may be required.