Cha pte r A
Components of AML System
Cha pte r A
3. Backward stability stop: (Applicable to GR-250N-3, GR-700N-1) When the boom is raised over the specified angle, the output from Do1 stops and the crane operation stops automatically due to AML vent. Recovery from the automatic stop is possible only by boom raising. 4. Working range limit stop: When the boom head approaches a pre-registered limit of the working range, slow stop function works and the AML energizes the corresponding proportional solenoid valve. It slowly closes the pilot pressure circuit for the main control valve to decelerate crane operation until the main control valve becomes neutral and the output from Do1 stops to make AML vent disable crane operation. For slewing limit, however, the proportional solenoid valve makes the main control valve immediately to stop the crane. In this case the crane does not slew beyond the limit even if the AML override is activated, and it slews only toward within of the limit.
1.1.2 AML-C block diagram
[NOTICE] ◆Configurations may vary depending on models or specifications.
A-2
W301-0481E
