Instruction Manual
DPA-18 Air Hyd. Power Unit - V1.0
www.durapac.com
Page 9 of 11
7.0
Troubleshooting
Problem
Cause
Solution
Application does not extend,
move or respond to
pressurised fluid
Overload condition
Remedy overload condition
Loose couplers
Tighten couplers
Faulty couplers
Replace couplers
Malfunctioning power unit
Contact a Durapac authorised
service centre
Repair or replace as necessary
Inadequate air supply
Ensure air source can dedicate
7.8 cfm @ 4-12 bar/60-175 psi
Pump not primed
Prime pump as per 4.7 -
Priming the Pump in the
Installation Section
Fluid intake filter
contaminated
Remove reservoir, clean intake
filter and reinstall
Application responds to
pressurised fluid, but system
does not maintain pressure
Overload condition
Remedy overload condition
Malfunctioning power unit
or valve
Contact a Durapac authorised
service centre
Repair or replace as necessary
Leaking
application/connection
Replace
application/connection
Application responds slower
than normal
Loose connection or coupler
Tighten connection or coupler
Restricted hydraulic line or
fitting
Clean and replace if damaged
Leaking
application/connection
Replace
application/connection
Inadequate air supply
Ensure air source can dedicate
7.8 cfm @ 4-12 bar/60-175 psi
Application does not return
fluid to power unit (i.e.
cylinder will not retract)
Malfunctioning coupler/
damaged application
Secure load by other means
Depressurise power unit and
hose
Remove coupler and/or
application
Repair or replace as necessary
Application does not fully
extend (cylinder or spreader)
Overfilled reservoir
Secure load by other means
Depressurise power unit and
hose
Remove application
Drain fluid to proper level
Low fluid level in power unit
Secure load by other means
Depressurise power unit and
hose
Remove application
Fill fluid to proper level
Excess oil spray from muffler
Air lubricator is set too high
Set at one drop per minute