Instruction Manual
PEM3024 Power Unit - V1.0
www.durapac.com
Page 5 of 9
4.5
Check oil level in reservoir before operating the power unit.
4.6
Remove air from the system – Air can accumulate in the hydraulic system during the
initial setup or after prolonged use, causing the cylinder to respond slowly or in an
unstable manner. Should removal of air from power unit be required, please follow the
steps in 6.2 – Bleeding Air from the System in the Maintenance Section.
5.0
Operation
IMPORTANT:
Always monitor pressure, load or position using suitable equipment. Pressure may be
monitored by means of an optional manifold and gauge. Load may be monitored by
means of a load cell and digital indicator. Correct application position can only be
determined by the operator of the equipment
Do NOT
operate a pump that is disconnected from the application. If operated in this
condition, the hose and connections will become pressurised. This increases the
chance of a burst hazard. Damage may also occur to the pump and its components
5.1
Before Using the Power Unit
5.1.1
Check all system fittings and connections to be sure they are tight and leak free.
5.1.2
Check oil level in reservoir.
5.1.3
Ensure the air breather is fitted to the power unit.
CAUTION:
The vent plug must be open whenever the power unit is running
5.2
Lifting
5.2.1
Start the motor with the valve in a neutral or discharge position.
5.2.2
With a manual directional control valve, turn the handle of the valve to the “A”
position to advance the cylinder. The operator should ensure appropriate flow
control valves are closed to hold load positively if required.
5.2.3
To stop advancing of the cylinder move the directional control valve handle to
the centre or neutral position. Some pressure loss through the control valve
may be experienced at this point, but load should be held by the load holding
valve if fitted.
5.3
Lowering
5.3.1
To lower a single acting cylinder stop the motor and after ensuring the load
control valve is closed move the directional control valve handle to the
“B”position. Slowly open the load control valve to lower the cylinder.
5.3.2
To lower a double acting cylinder move the handle of the directional control
valve to the “B” position while the motor is on. Ensure appropriate pilot check
valves or other load lowering valves are fitted to the cylinder to achieve a
controlled lowering of the load. If in doubt refer to Durapac for further
guidance.
