UDRF01.04GB
Maintenance manual DRF 400–450
7 Load handling – 7.5 Positioning
19
7.5
Positioning
page
–
Spreading, function description
Spreading means that the width between the twistlocks is changed.
Spreading has two 20-foot and 40-foot stops, as an option there are
stops at other distances, e.g., 30-foot stop.
Control valve attachment pressurizes valve block spreader motor
that directs pressure to the spreader motor. The spreader motor
pulls the spreader chains that pull the spreader booms in and out.
Spreading is controlled with Control lever (S815). Inductive position
sensors indicate the spreader units' position.
Damping
Damping means that the speed of functions are reduced automati-
cally close to end-positions. Three seconds after damping is activat-
ed, the function is interrupted. This results in less loading of
mechanical parts at stops in end-positions.
Position sensors sense when damping should be activated. When
damping is activated, the control unit in question reduces the con-
trol current to the solenoid valve for that function.
001114
Condition
Reference value
Control switch
Not activated
Twistlocks
Unlocked or by-pass activated
Overloading system
Passive
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Summary of Contents for DRF420-60S5
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