Introduction
Thank you for purchasing our electric hydraulic pump. This instruction manual explains operation
procedures, warnings and cautions, and trouble shootings for RIKEN electric Hydraulic Pump
Model EMP-5 series.
Before operation, both first-time users and experienced users are requested to read this manual
carefully, and understand the contents thoroughly. This manual should be in a safe place but
accessible for reference during operation.
WARNINGS
Do not use this pump at the place where personal injury or property damage might happen
when the hydraulic working oil scatters by any faults. Also do not use this pump close to
flammable materials to minimize the risk of injury and fire.
Before applying pressure, the blind plug of the oil output port should be taken off. Apply
pressure after the high pressure fittings and accessories (Hydraulic hose, Coupler) are
mounted.
The maximum output pressure of these pumps is 70 MPa. For safety, each pump is factory
fitted with a high pressure safety valve adjusted to 73 MPa. Do not allow the safety valve to be
adjusted to a level higher than 73 MPa. Where the pump is fitted with a pressure switch, set
this at 70 MPa or less.
When using this pump with hydraulic equipment of which working pressure is less than 70
MPa, lower the setting of the high pressure safety valve and adjust the pressure switch to
match the working pressure of the equipment. Failure to lower settings could result in the
equipment damage. For the method of adjustment, refer to page 18 “Adjusting the High
Pressure Safety Valve".
Ensure power is switched off before conducting electrically related maintenance or inspection.
Ensure to use oil at temperatures between 5° and 60° Celsius. The use of oil that exceeds 60°
Celsius will shorten the lifespan of the hydraulic equipment and might cause personal injury if
the heated oil is touched. Install an oil cooler to lower oil temperature for safety.
Do not hang the oil tank with ropes hooked on the side handles of the tank. It may cause
serious injury if the pump drops or falls.
SAFETY INSTRUCTIONS
To use this pump safely, correct operations and periodical checking are required. Do not operate
this pump before reading and understanding safety instructions thoroughly shown in this manual.
And follow
“WARNING” this mark is used to prevent accidents leading to personal injury.
“CAUTION” this mark is used to prevent accidents leading to property losses or damages.
As both marks provide important instructions, that must follow them. Ensure to switch the power
off if abnormal condition happens, and contact the sales agent.
