Siegmund 16002766, Руководство по сборке и эксплуатации

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FEHLER URSACHE LÖSUNG
Unit does not keep Pressure Hydraulic system may
be polluted
Pumping jerkily with open and closed
lowering valve. Produce strong internal
oil flow to flush pollutants of the valve
seating.
Repeat this procedure several times.
Temperature fluctuations The unit is a closed system which is
acting to temperature fluctuations
because of its tightness.
While cooling down (overnight, par
example) the clamping pressure may
change. The work piece may loosen!
This is not a default of the unit!
Keep the surrounding temperature
constant.
Piston rod is bucking,
hardly retracting
Attachment parts may be
to heavy
The spring force is strongest at maxi-
mum stroke and declines at reduced
stroke accordingly. Reduce the weight
of the attachments.
Polluted piston rod Clean the piston rod.
Piston rod does not extend Safety valve is responding Maximum clamping pressure reached
No stroke without load Bursting element responding
See chapter 5.1
5.1. SAFETY VERSUS OVERLOAD
The unit is fitted with two systems safeguarding overload caused by excessive hydraulic pressure.
SYSTEM 1
Pressure safety with pressure control valve (DBV)
The pressure control valve secures the unit against excessive pressure, which is applied from the
operator with the hand grip. The DBV opens and prevents an excessive hydraulic pressure inside
the unit.
The DBV is closing automatically responding to relevant lower pressure. The unit stays functional.
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