Instruction Manual
SPES3502AR Electric PU - V1.0
www.durapac.com
Page 6 of 12
5.2
Power Unit Operation
5.2.1
Plug in power unit.
5.2.2
Press ON switch to run the motor and to A
dvance
the cylinder.
5.2.3
Release ON switch to stop the motor and automatically R
etract
the cylinder.
Note – the cylinder retraction will occur after a slight pause because this power
unit is fitted with a pressure valve rather than a solenoid valve.
5.3
Relief Valve Adjustment
All power units contain a factory set internal relief valve to prevent over-pressurisation
of the system. A deck mounted adjustable pressure relief valve is also included and can
be set to lower working pressures (see Item 5, shown in Section 8.1 – High Level
Description of Parts).
Turn the adjusting screw a few turns (counter-clockwise) to decrease the pressure
setting to the desired level. Clockwise rotation of the adjusting screw will increase
pressure.
6.0
Maintenance
IMPORTANT:
Disconnect power supply before disassembly or repair
Check oil level regularly
Use only good quality hydraulic fluid.
Do NOT
use brake fluid, transmission fluid,
turbine oil, motor oil, alcohol, glycerine etc. Use of anything other than good quality
hydraulic oil will void warranty and damage the power unit, hose, and application. We
recommend Durapac Hydraulic Oil or equivalent
Equipment must only be serviced by a qualified hydraulic technician. For repair service,
contact your local Durapac authorised service centre
Damage to hydraulic hoses may not be detected during visual inspections. For this
reason, Durapac recommends that hydraulic hoses be replaced on a regular basis
Tighten connections as needed. Use non-hardening pipe thread compound when
servicing connections
Dirt, sand, etc. will quickly ruin any hydraulic system. Ensure that couplings are clean and
free of foreign matter. After each use, clean couplings and attach dust caps.
Maintenance is required when wear or leakage is noticed. Periodically inspect all
components to detect any problem that may require service and maintenance.
6.1
Adding Hydraulic Fluid
WARNING: Always add oil with cylinders fully retracted (or extended, if pull cylinders) or
the system will contain more oil than the reservoir can hold
6.1.1
Depressurise and disconnect hydraulic hose from application/cylinder.
