Instruction Manual
PHS-1900 Hydrostatic Pump - V1.0
www.durapac.com
Page 6 of 6
5.2.2
Work the pump handle up and down to send fluid through the hose to the
cylinder. This will cause the piston to extend to the work piece. Pressure will be
maintained until release valve is opened.
Note
: The pump is equipped with an overload valve that will bypass fluid back into the
pump reservoir in an overload situation (when the system meets maximum pressure).
In this case, continued pumping will have no effect on the system. If an overload
situation commonly occurs, a higher capacity set is needed.
5.2.3
To release pressure, slowly turn the release valve counter clockwise. This will
allow the fluid to flow back to the reservoir. The release speed is controlled by
how fast the valve is opened.
5.3
Pressure Relief Valve
All pumps contain a factory set relief valve to prevent over-pressurisation of the
system.
Do NOT
adjust this pressure.
6.0
Maintenance
IMPORTANT:
Check fluid level regularly
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 fluid with cylinders fully retracted (or extended, if pull cylinders)
or the system will contain more fluid than the reservoir can hold
6.1.1
Depressurise and disconnect hydraulic hose from application/cylinder.
6.1.2
Put the pump in a vertical position (pump head face down), remove fluid filler
plug located on rear of the pump reservoir.
6.1.3
Use a small funnel to fill the fluid to approximately 85 mm from the top of the
fluid filler hole.
6.1.4
Bleed air from system if necessary.
6.1.5
Wipe up any spilled fluid and reinstall the air vent plug/reservoir cap.
