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OPERATION
Legend for illustration Z23077
(A)
Access ladder in lowered position
(B)
Access ladder in upper position (Working position)
(1)
Access ladder
(2)
Light switch for access area lighting
(3)
Pull chain for emergency lowering of the access ladder
Use this chain only in emergency cases, when the Operator
does not respond to other communication signals.
When the chain (E) is being pulled down with the engine running, the pilot control system is made
inoperative, preventing further movements of the Shovel.
(4A)
Control switch for access ladder at machinery house door
(4B)
Control switch for access ladder at operator's cab
(5)
Push button for lifting the ladder
(6)
Push button for lowering the ladder
(7)
Sliding window for emergency exit from operator's cab
(8)
Emergency escape ladder
(9)
Ladder pivot bracket
(10)
Monitor and control sensor (S91). Function of sensor (S91): This sensor monitors the ladder posi-
tion and controls the moving speed of the ladder. In case the sensor (S22) fails to function prop-
erly, the sensor (S91) prevents unintended movement of the ladder.
(11)
Safety sensor (S22), located on ladder pivot bracket. Function of sensor (S22): Cut out of the pilot
control system and actuation of the hydraulic swing brake with the ladder in lowered position.
(12)
Lock nut for ladder pivot ball bearing
Operating the hydraulic Access Ladder
Make sure the moving range of the ladder is clear of all
persons before raising the ladder. Stop raising the ladder
by releasing the button (5) if there are any obstacles
within the moving range of the ladder.
Mount the ladder only in completely lowered position.
Entering the ladder in any other position can result in
serious injury or death.
DO NOT lift persons with the hydraulic access ladder.
Death or serious injury can result.
DO NOT lift objects (tools) with the hydraulic access lad-
der.
WARNING
WARNING
3.2 CONSTRUCTION OF THE SHOVEL
47
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