Hydraulic Requirements - Danuser EP6 Hex Operator's Manual

Hydraulic
Requirements
Filtration Requirements:
• A filter of, at least, 25 micron filtration is required. A filter capable of 10 micron
filtration is preferred. The majority of paper type filters are 25 microns or better.
The life of the hydraulic motor is almost entirely dependent upon cleanliness of
NOTE
the oil. Instructions in your vehicle operator's manual regarding filter and oil
changes should be carefully followed. Even small amounts of dirt in the
hydraulic oil can cause premature motor failure that is not covered by warranty.
• A low pressure type filter can be installed in the return line from the control valves to
the sump. A low pressure type filter can, also, be installed in the sump or pump intake
line, but must be sized large enough to avoid starving the pump.
• A high pressure type filter can be used between the pump and the control valves.
• If the source of the hydraulic power does not have a filter, it will be necessary to install
one at some point in the system so, at least, part of the hydraulic oil is being filtered
whenever the system is operating. After a filter is installed and before attaching the
drive unit, the entire hydraulic system should be drained, filled with new oil, and
operated for 30 minutes or until the system is warm. During this run time, operate all
valves, cylinders, and hydraulic motors on the machine.
Pressure and Flow Requirements:
• Models EP6, EP10, and EP15 Danuser Earth Augers are designed to operate within the
pressure range of 1500 to 3000 PSI.
• Operating flow rate is dependent on model: 6 to 15 GPM for Model EP6, 10 to 20
GPM for Model EP10, and 15 to 30 GPM for Model EP15.
Valve Requirements:
• The hydraulic system used to power the drive unit should be equipped with a four-way
valve large enough to carry full pump outlet without restricting flow and causing oil
heating.
• The four-way valve requires a relief valve which will open and relieve extreme
pressures between the drive unit and control valve, even when the control valve is in a
neutral position. This feature can be obtained by connecting two external relief valves
between the main lines running from the control valve to the drive unit in such a way
that high pressure in either line will be relieved to the other line.
Hydraulic Hose Requirements:
• High pressure hoses of, at least, 1/2 inch inside diameter connect four-way valve to the
hydraulic fittings on the top of the drive unit. If the drive unit is mounted 10 feet or
more from the hydraulic outlets on your unit, or the pump delivers 20 GPM or more,
hose size should be increased to 3/4 inch inside diameter.
• Working pressure of hydraulic hoses must be higher than the rated vehicle hydraulic
pressure.
• An abrasion sleeve is recommended on all hydraulic hoses.
• The hydraulic hoses should be equipped with a 45-degree fitting on the drive unit end.
• The hydraulic fittings on the top of the drive unit are #10 JIC male.
• Since the motor is reversible, hose connections to motor fittings are interchangeable.
• All hoses, pipes, and fittings used to connect the drive unit should be thoroughly
cleaned before use. Care should be taken to see that no thread sealer or metal chips are
forced to the inside of the joints when connections are being tightened.
Hydraulic Fluid Selection Requirements:
• Premium grade petroleum based fluids will provide the best performance.
• A hydraulic fluid that contains anti-wear agents, rust inhibitors, anti-foaming agents,
and oxidation inhibitors is recommended.
• The viscosity of the fluid should never fall below 70 SUS (13 cST). The best
viscosity range of the drive unit is 100-200 SUS (20-43 cST).
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