10
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.
• 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 EP615, EP1020, EP1530, and EP2035 Danuser Earth Augers are designed to
operate within the pressure range of 1500 to 3500 PSI.
• Operating flow rate is dependent on model: 6 to 15 GPM for Model EP615, 10 to 20
GPM for Model EP1020, 15 to 30 GPM for Model EP1530, and 20 to 35 GPM for
Model EP2035.
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" inside diameter connect four-way valve to the
hydraulic fittings on the top of the drive unit.
• Working pressure of hydraulic hoses must be higher than the rated vehicle hydraulic pressure.
• An abrasion sleeve is recommended on all hydraulic hoses.
• The drive unit is equipped with two 45° adapters to which hoses can be connected. These
adapters are #10 JIC M.
• Since the motor is reversible, hose connections to motor fittings are interchangeable.
• All hoses, pipes, adapters, 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.
• Fluids that contains anti-wear agents, rust inhibitors, anti-foaming agents, and oxidation
inhibitors are recommended.
• The viscosity of the fluid should never fall below 70 SUS (13 cST). The best
viscosity range for the drive unit is 100-200 SUS (20-43 cST).
Hydraulic
Requirements
The life of the hydraulic motor is almost entirely dependent upon cleanliness
of 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.
For vehicles delivering higher than 3500 PSI, a cross port relief valve is available.
Refer to Accessories section.
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