Instruction Manual
DPA-18 Air Hyd. Power Unit - V1.0
www.durapac.com
Page 6 of 11
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 power unit 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 power unit and its
components
5.1
Pump without an Air Regulator
5.1.1
To extend the cylinder, depress the “Advance” end of the pedal until desired
pressure, load or position is reached.
5.1.2
To hold the cylinder in position, release the “Advance” end of the pedal to
deactivate the power unit.
5.1.3
To retract the cylinder, depress the “Retract” end of the pedal.
Figure 3 – Operation
5.2
Pump with an Air Regulator
5.2.1
Open the air shut-off valve or connect the air quick coupler.
Note
- Under
certain circumstances the pump may need to be primed before operation. Refer
to 4.7 - Priming the Pump in the Installation Section.
5.2.2
Slowly turn the air regulator control on the unit;
clockwise to increase
pressure,
counter-clockwise to decrease
pressure. As air enters the pump, it will begin to
deliver fluid to the system.
5.2.3
Continue to slowly turn the air regulator control clockwise until the unit gauge
reaches the maximum hydraulic pressure rating. A maximum hydraulic pressure
reading should be obtained if air pressure is approximately 10 bar.
5.2.4
Shut off and disconnect the air supply to the pump to release all system
pressure. Check fluid level when the hydraulic system is retracted.
5.2.5
The pump is now ready for operation.
