Lubrication - Page 43
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Carrier hydraulic oil
RPV14R, RPV22R, RPV29R, RPV39R, RPV53R, RPV75R
2.3 OIL FILTER
The purpose of the oil filter is to remove impurities from the hydraulic oil. Air and
water are also impurities in oil. Not all impurities can be seen with the naked eye.
Impurities enter the hydraulic system:
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During hydraulic oil changes and refilling.
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When components are repaired or serviced.
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When the product is being installed on the carrier.
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Because of component wear.
Normally the existing, main oil filters of the carrier are used as attachment circuit
return line filters. Contact the carrier manufacturer or your local dealer concerning
instructions for the filter change intervals.
In product work, the carrier oil filter must fulfill the following specifications:
■
The oil filter must allow maximum particle size of 25 microns (0.025 mm).
■
The oil filter material must be man-made fibre cloth or very fine gauge metallic
mesh to withstand pressure fluctuations.
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The oil filter must have a nominal flow capacity of at least twice the product's
maximum flow.
In general, oil companies guarantee new oils to have a maximum particle size of 40
microns. Therefore, filter the oil when filling the tank.
The damage caused by hydraulic oil impurities in the carrier and attachment circuits
include:
Shortened working life of pumps and other components
■
Rapid wear of parts.
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Cavitation.
■
Wear of cylinder and gaskets.
Reduced attachment efficiency
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Accelerated wear of moving parts and seals.
■
Oil leakages.
Shortened working life and reduced lubricating capability of oil
■
Overheated oil.
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Deteriorated oil quality.
■
Electrochemical changes in hydraulic oil.
