345B, 345B Series II and W345B Series II Excavators Engine and Pump Control Senders Caterpillar


Senders
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345B, 345B Series II and W345B Series II Excavators Engine and Pump Control [SENR1935]
ELECTRICAL AND STARTING SYSTEM
SENDER GP
345B, 345B Series II and W345B Series II Excavators Engine and Pump Control Senders
1.1. Fuel Level Sender
2.1. Fluid Temperature Sender

Fuel Level Sender




Illustration 1g00666282

Fuel Level Sender

The fuel level sender is attached to a float in the fuel tank. As the fuel level changes, the float inside the tank moves. The movement of the float will change the resistance of the sender. The voltage at the input to the controller for the sender will change as the resistance of the sender changes. The controller will monitor this voltage and the controller will compare this voltage to values that are known. This comparison will determine the level of fuel in the tank.

Fluid Temperature Sender




Illustration 2g00020687

Fluid Temperature Sender

The fluid temperature sender is attached to the hydraulic tank or the cooling system. The resistance of the sender will change as the temperature of the fluid changes. The voltage at the input to the controller for the sender will change as the resistance of the sender changes. The controller will monitor this voltage and the controller will compare this voltage to values that are known. This comparison will determine the temperature.

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