Allied HO-PAC 1000 Series, Technical Manual, Page: 9 / 50

1000 Series Ho-Pac
generation and damage the
attachment and/or carrier.
•
STATIC RELIEF PRESSURE is
the hydraulic oil pressure when all
oil flow is diverted through the
relief valve and away from the
attachment. The attachment must
never be subjected to pressures
above the static relief pressure.
The difference between static relief
pressure and dynamic relief
pressure varies with relief valve
design. In some instances, the
relief valve may be inadequate to
divert full oil flow at less than the
Static Relief Pressure. If this is the
case, contact your local Allied
dealer for assistance.
FLOW
PRESSURE
Hydraulic
Flow Range
Operating
Pressure
Range
Static Relief Pressure
(No flow to attachment)
Dynamic Relief Pressure
(Begin flow through relief valve)
Attachment
Operational
Range
Operating Pressure
Figure 3.1: Flow-Pressure Diagram
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