OPERATION 3.2 CONSTRUCTION OF THE SHOVEL Legend for illustration Z 23018 (A) Access ladder in lowered position (B) Access ladder in upper position (Working position) (C) Stop bar (D) Manual actuator for fire suppression system (if so equipped) (E) 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. (S84) Ladder control switch for lowering the ladder (S84B) Ladder control switch for lifting the ladder (S84A) Safety switch for emergency lowering of the access ladder.
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. (S22) Safety sensor, 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. (S91) Monitor and control sensor Function of sensor (S91): This sensor monitors the ladder position and controls the moving speed of the ladder. In case the sensor (S22) fails to function properly, the sensor (S91) prevents unintended movement of the ladder.
(S33A) Emergency shutdown switch for both engines 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 control switch (S84B) 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. 47 CAUTION WARNING WARNING