PAN-ADAPT 2759885 - Caterpillar

Illustration 1 g06239128
Location of power train components
(1) Pedal control group
(2) Transmission Lever
(3) Hydrostatic pump
(4) Hydraulic motors
(5) Pump for the demand fan
(6) Hydraulic oil filtersThe electronic hystat control system controls the hydrostatic transmission functions. The hydrostatic transmission responds to inputs from the operator. Also, the hydrostatic transmission responds to inputs from the sensors. The electronic hystat control system controls the following items:
The displacements of the hydrostatic drive pumps and motors
The output for the backup alarm
The state of the hydrostatic transmission override valve
The state of the parking brake valveThe system also provides engine overspeed and underspeed protection. In an overspeed condition, the system automatically adjusts the current that is supplied to the hydrostatic transmission pumps and motors in order to slow the machine. Engine underspeed protection is provided by decreasing the control currents to the hydrostatic transmission pumps and to the motors. This is in response to the low engine speeds and to the engine lug.Operator Presence Determination
Machine operation will be enabled or machine operation will be disabled based on the operator presence status. The operator presence status will be set to "Operator Not Present" when the operator is not sensed in the seat and the brake pedal is not depressed.In all other situations, the operator presence status will be set to "Operator Present".If the operator presence status is "Operator Not Present", the transmission and implement controls will be inoperable.If the operator presence status changes from "Operator Not Present" to "Operator Present", the parking brake switch must be switched in order to allow the transmission and implements to be activated.If the operator presence status changes from "Operator Present" to "Operator Not Present" while the machine is in motion, the machine will not stop.