UDRF01.04GB
Maintenance manual DRF 400–450
4
7 Load handling – 7.2 Lifting/lowering
7.2
Lifting/lowering
page
–
Lift and lower, function description
Lift and lower means to angle the boom up and down so that the at-
tachment is lifted and lowered. The lift boom is angled with two lift
cylinders that are pressurized by Control valve lift, lower and exten-
sion. The lift function 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 speed, oil from the rod side (2) is reused to the piston
side (1), this is called regeneration. Engagement of regeneration is
controlled by the control system.
001109
000455
1
2
Condition
Reference value
Control switch
Not activated
Twistlocks
Locked or unlocked, not intermediate position
Overloading system
Boom up: passive
Boom down: passive or by-pass activated
Alignment
Boom down: no alignment
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Summary of Contents for DRD450-80S4X
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Page 18: ...UDRF01 04GB Maintenance manual DRF 400 450 2 BSafety https www forkliftpdfmanuals com...
Page 60: ...UDRF01 04GB Maintenance manual DRF 400 450 2 1Engine https www forkliftpdfmanuals com...
Page 86: ...UDRF01 04GB Maintenance manual DRF 400 450 2 2Transmission https www forkliftpdfmanuals com...
Page 100: ...UDRF01 04GB Maintenance manual DRF 400 450 2 3Driveline axle https www forkliftpdfmanuals com...
Page 106: ...UDRF01 04GB Maintenance manual DRF 400 450 2 4Brakes https www forkliftpdfmanuals com...
Page 124: ...UDRF01 04GB Maintenance manual DRF 400 450 2 5Steering https www forkliftpdfmanuals com...
Page 130: ...UDRF01 04GB Maintenance manual DRF 400 450 2 6Suspension https www forkliftpdfmanuals com...
Page 150: ...UDRF01 04GB Maintenance manual DRF 400 450 2 7 Load handling https www forkliftpdfmanuals com...
Page 218: ...UDRF01 04GB Maintenance manual DRF 400 450 2 8 Control system https www forkliftpdfmanuals com...
Page 320: ...UDRF01 04GB Maintenance manual DRF 400 450 2 D Error codes https www forkliftpdfmanuals com...
Page 412: ...UDRF01 04GB Maintenance manual DRF 400 450 2 ESchematics https www forkliftpdfmanuals com...
Page 572: ...UDRF01 04GB Maintenance manual DRF 400 450 2 F Technical data https www forkliftpdfmanuals com...