Oil Cooler; Oil Filter - RAMMER RD2019 Operator's Manual

RD2019 A-JAW, D-JAW, S-JAW, M-JAW
Note: We strongly recommend the use of different hydraulic oils in the summer and
in the winter if there is an average temperature difference of more than 35 °C (95
°F). The correct hydraulic oil viscosity is thus ensured.
SPECIAL OILS
In some cases special oils (e.g. biological oils and non-inflammable oils) can be
used with the crushers. Observe the following aspects when considering the use of
special oils:
■ The viscosity range in the special oil must be in the given range (20-1000 cSt)
■ The lubrication properties must be sufficient
■ The corrosion resistance properties must be good enough
Note: Although a special oil could be used in the carrier, always check its suitability
with the attachment. Contact the oil manufacturer or your local dealer for more
information about special oils.

2.2 OIL COOLER

The carrier hydraulic system must be able to maintain the temperature within an
acceptable level during the crusher operation. This is for two reasons.
1. Seals, wipers, membranes and other parts manufactured from the corresponding
materials can normally stand temperatures up to 80 °C (176 °F).
2. The higher the temperature is, the less viscous the oil gets thus losing its
capability to lubricate.
A standard carrier, with a proper crusher circuit, meets the requirements of the
necessary cooling capacity. If the oil temperature tends to be too high during the
crusher operation, the following things must be checked:
■ The crusher circuit pressure relief valve should not be opened unnecessarily.
■ The crusher circuit pressure drops must be reasonable, less than 20 bar (290 psi)
in the hydraulic line.
■ There should be no internal leakages in crusher or in carrier hydraulic pumps,
valves, cylinders, motors, etc.
If all of the above mentioned things are in order, and the temperature of the
hydraulic oil still tends to be too high, extra cooling capacity is needed. Consult the
carrier manufacturer or dealer for details.

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.
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Carrier hydraulic oil
Lubrication - Page 47