Protruding - Kalmar DRF420-60S5 Maintenance Manual

10
page –
1
Condition
Control switch
Overloading system
UDRF01.04GB
7 Load handling – 7.3 Protruding
7.3
Extension, function description
Extension means to push the inner boom in and out in the outer
boom. The inner boom is pushed in and out by the extension cylinder
which is pressurized by Control valve lift, lower and extension. Ex-
tension is controlled with Control lever (S815).
Damping
Damping means that the speed of functions is reduced automatical-
ly near the end-positions. This results in less stress on the mechan-
ical parts when stopping in the 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.
Regeneration
To increase the extension speed, oil from the rod side (2) is reused
2
to the piston side (1), this is called regeneration. Engagement of re-
generation is controlled by the control system.
Reference value
Not activated
Boom out: passive
Maintenance manual DRF 400–450
https://www.forkliftpdfmanuals.com/

Protruding