TM 5-3895-383-24Circuit OperationIllustration 43Vibratory Circuit Operation(1) Propel range switch. (2) Fuse. (3) Vibratory control solenoids. (4) Throttle switch. (5) Vibratory on/off switch. (6) Vibration controlswitch. (7) Frequency control/adjustment card. (8) Resistor. (9) Variable frequency control.When the key start switch is in the ON position, the main relayis closed and system voltage is present in wire 112-PU-10.The system voltage is present in wire 103-YL when fuse (2) isokay.If the propel range switch (1) is in LOW position, voltage will bepresent at wire C905-OR and throttle switch (4). The throttleswitch (4) must be in HIGH position so that the voltage will bepresent at wire C906-PU.When the vibration control switch (5) is pressed, the switch willclose. The switch will create a path through wire B919-GN tothe switch on the vibration control switch (6). If the vibrationcontrol switch is in the center position, the vibratory system isnot activated, or OFF. If the vibration control switch is in theLOW position, a path to wire 200-BK is created, and thefrequency control/adjustment card controls the circuit to allowonly low amplitude signal to the solenoids (3). If the vibrationcontrol switch is in the HIGH position, a path to wire 924-OR iscreated allowing the high amplitude signal to reach thesolenoids. The variable frequency control (9) is a rheostat thatcontrols the current flow that determines speed at which thesolenoids react to create the speed of vibration.11-39
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