DD.057 ENG R(0)
SECTION B: SAFETY TECHNICS
B1 RULES FOR TECHNICAL SAFETY
To work with the power pack it could be allowed only personel who is acknowledged with the rules for
actuation of electrical equipments and equipments working under pressure.
For safety functioning of the hydraulic power pack it is necessary to be kept the following rules:
•It is not allowed an actuation of the power pack with replaced cap of the terminal connecting box of
the motor or using connectors on the coils of the solenoid valves that are not of the same type like
these with which the power pack is accomplished.
•The connection has to be done from a qualified electrician. During the connection it should be
observed the direction of rotation of the electric motor. Electric motor rotation from shaft view must be
anti-clockwise.
•Hydraulic connection must be carried out carefully. There is one outlet port on the manifold that needs
to be connected to the actuator in the system.
•The selection of the pipelines must be complied with the system pressure and flow rate.
•The tube connectors must be fixed tightly. It should not be allowed any fluid leakage at the outer
surfaces. Proper sealing elements should be used.
•It is not permitted the replacement of the air breather with plug.
•It is not permitted pressure relief valve readjustment to a higher pressure.
•The power pack must be fixed to a basement or to a stable frame.
•It is not allowed the power pack use in explosion –hazardous and combustable environment.
•Lack of oil may cause damage to hydraulic pump.
•Insulated cables must be used in connection.
•Power pack assembly should not be carried out in watery environment.
•DC motor + & - poles should not contact each other.
•DC motor cable ends must be insulated.
•DC motor should not operate without starter assembled on it.
•There are breathers with red color on oil tanks. Blind plugs should not assemble on these breathers.
•Hose diameters should not be too small.
SECTION C: DESCRIPTION OF THE HYDRAULIC POWER PACK
C1 MAIN PARTS
The power pack is consisted on the following main elements:
•Electric motor
•Central manifold
•Hydraulic gear pump
•Oil tank
•Filter
•Hand pump and unloading valve
•Pressure relief valve
•Pressure compensated flow control valve
•Normally closed 2/2 cartridge valve
