Instruction Manual
PEM3024 Power Unit - V1.0
www.durapac.com
Page 9 of 9
Problem
Cause
Solution
Application does not
fully extend (cylinder
or spreader)
Reservoir overfilled
Secure load by other means.
Depressurise power unit and hose,
remove application, then drain fluid to
proper level
Low fluid level in power
unit reservoir
Secure load by other means.
Depressurise power unit and hose,
remove application, then fill and bleed the
system
Load above capacity of
system
Use correct equipment
Application responds
slower than normal
Loose connection or
coupler
Tighten couplers
Restricted hydraulic line
or fitting
Clean and replace if damaged
Power unit not operating
correctly
Check power unit’s operating instructions
Repair or replace as necessary
Low fluid level in power
unit reservoir
Secure load by other means.
Depressurise power unit and hose,
remove application, then fill and bleed the
system
Application responds
to pressurised fluid,
but system does not
maintain pressure
Leaky connection
Clean, reseal with thread sealant, and
tighten connection
Leaking cylinder seals
Replace worn seals. Look for excessive
contamination or wear. Replace
contaminated fluid
Power unit or valve not
operating correctly
Contact a Durapac authorised service
centre for repair
Overload condition
Remedy overload condition
Application does not
return fluid to power
unit (i.e. cylinder will
not retract)
Closed release valve
Secure load by other means.
Open release valve
Loose couplers
Secure load by other means.
Tighten couplers
Blocked hydraulic lines
Secure load by other means.
Clean and flush lines
Weak or broken
retraction springs
Secure load by other means.
Contact a Durapac authorised service
centre for repair
Internally damaged
cylinder
Secure load by other means.
Contact a Durapac authorised service
centre for repair
Power unit reservoir too
full
Secure load by other means.
Depressurise power unit and hose,
remove application, then drain fluid to
proper level
