Instruction Manual
DPA-18 Air Hyd. Power Unit - V1.0
www.durapac.com
Page 5 of 11
4.2
Air Connection -
Remove plastic cap, connect suitable air supply to air input port. Air
input port is designed to fit the popular 1/4" NPT air nipple (not included). Ensure that
your air source can dedicate 7.8 cfm @ 4-12 bar/60-175 psi to each power unit being
operated.
Figure 1 - DPA-18
4.3
Check all system fittings and connections to be sure they are tight and leak free.
4.4
Check oil level in reservoir before operating the power unit.
4.5
Remove air from the power unit
– 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.
4.6
Priming the Pump -
Press the retract end of the pedal while holding down the air intake
valve with a hexagonal wrench. The air intake valve is located directly under the pedal.
Allow the pump to cycle approximately 15 seconds. Remove the wrench and press the
advance end of the pedal. If the cylinder extends or pressure builds, the pump has been
successfully primed. If the pump does not respond, repeat the procedure, jogging the
intake valve while holding the pedal in the retract position.
Figure 2 – Priming the Pump
No load
Load
DPA-18
S/A
3/8"-NPTF
1,800
700
1,240
160
4-12
8.2
Model
Number
Used
with
Cylinder
Weight
(kg)
Output Flow Rate
(cm
3
/min)
Air
Pressure
Range (bar)
Usable Oil
Capacity
(cc)
Oil Port
Thread
Pressure
Rating
(bar)
