9 Start-up
© Moog GmbH User Manual "D633-A Series" (CA80942-001; Version 1.0, 12/08) 46
DANGER
Hydraulic fluid squirting out under high pressure can
cause serious personal injuries, burns and fires.
Depressurize all hydraulic lines and accumulators in the hy-
draulic circuit before mounting or removing, electrical or hy-
draulical connection, start-up, troubleshooting or servicing.
WARNING
Only properly qualified and authorized users may work
with and on the valves.
Chapter "2.4 Selection and qualification of personnel",
WARNING
Excessive pressure at the hydraulic ports damages the
valve and can cause unsafe states in the machine and per-
sonal injury.
Pressure-limiting valves, for example, or other comparable
safety devices must be installed to limit the pressure at all of
the hydraulic ports to the specified maximum operating pres-
sure.
Maximum operating pressure:
Chapter "4 Technical Data", page 25
WARNING
Prior to start-up, the valves must be checked for correct
mechanical design. Wrong mechanical design of the
valves will result in danger due to:
• Uncontrolled sequences of motions
• Destruction
• Malfunction
CAUTION
The valve shipping plate may only be removed from the valve
hydraulic ports directly prior to mounting and must be re-
mounted directly after the valve has been removed. This is the
only way of adequately protecting the valves against the in-
gress of dirt and moisture and protecting the seals against the
effects of ozone and UV.
The shipping plate and the associated fastening elements
(screws and nuts) must be kept for later use, e.g., during trans-
portation.
CAUTION
Do not misuse the connectors, mating connectors (plugs) and
connection cables of the valves, e.g., as a tread or transport
fixture.
CAUTION
Dirt or moisture can get into the valve through open connec-
tors, i.e., if no mating connector is attached, which may result
in damage to the valve.
Open connectors must be covered and sealed.
CAUTION
To provide protection against injuries or other damaging influ-
ences on health, suitable protective measures must be taken if
necessary prior to and when carrying out any work on the
valves or the machine, such as e.g., mounting or removing,
electrical or hydraulic connection, troubleshooting or servicing,
and when handling the valves, accessories, tools or hydraulic
fluids.
Chapter "2.6 Occupational safety and health", page 9
