Instruction Manual
SPES3502AR Electric PU - V1.0
www.durapac.com
Page 9 of 12
7.0
Troubleshooting
WARNING:
Disconnect power supply before disassembly or repair
Problem
Cause
Solution
Motor will not start
Inadequate or faulty electrical
supply
Check the line voltage
Check the condition of the power
unit’s power cord
Check the condition of extension
cords
Check for tripped circuit breaker. Be
sure breaker is of adequate size
Contact a qualified electrician for
any necessary repairs
Carbon brush is worn
Refer to 6.4 – Replacing Carbon
Brushes
Noisy operation
Air trapped in system
Check all points where air may leak
into the system
Refer to 6.2 – Bleeding Air from the
System
Power unit reservoir too full
Drain fluid to correct level
Low fluid level in power unit
reservoir
Refer to 6.1 – Adding Hydraulic
Fluid
Fill and bleed the system
Power unit oil is over-
heating
Oil viscosity is too high
Refer to 6.3 – Changing Hydraulic
Fluid
Refill with a good quality hydraulic
oil
High pressure leakage on upper
pressure plate
Tighten plug
Low fluid level in power unit
reservoir
Refer to 6.1 – Adding Hydraulic
Fluid
Fill and bleed the system
Power unit runs but
will not pump oil
Power unit is not primed
Run power unit a few minutes
tipping from side to side
Externally adjustable relief valve
is not correctly set
Reset the relief valve to appropriate
level
Damaged o-ring
Send to a Durapac authorised
service centre for repair
Defective control valve
Send to a Durapac authorised
service centre for repair
Power unit does not
reach rated capacity
Low fluid level in reservoir
Secure load by other means
Depressurise power unit and hose,
remove application, then fill and
bleed the system
Leaking system components
Repair or replace as necessary
Poor performance
Fluid level in power unit is low
Secure load by other means
Depressurise power unit and hose,
remove application, then fill and
bleed the system
