WASHER 7S8787 - Caterpillar

Level Sender (Fuel)
Illustration 1 g00303717
Level Sender (Fuel)
(1) Sender. (2) Schematic symbol.
Fuel level sender (1) provides fuel level sensing. A resistive signal which corresponds to the depth of fuel within the fuel tank is sent from the sender to the main display module. Typically, there are two possible types of senders: 0 to 90 ohms and 33 to 240 ohms. The main display module measures the resistance value in order to determine the fuel that is remaining in the tank. Typical gauge readings for the fuel level:
When the fuel tank is at 4% of capacity, the gauge shows that the tank is empty.
When the fuel tank is at 14% of capacity, the gauge shows the needle at the red zone on the gauge.
When the fuel tank is at 77% of capacity, the gauge shows that the tank is full.Temperature Sender
Illustration 2 g00303718
Temperature Sender
(1) Schematic symbol. (2) Sender.
Temperature sender (2) provides a method for sensing fluid temperature. The temperature sender produces a resistive signal which corresponds to the temperature of the fluid that is being monitored. Typically, the resistance range of the sender is from 70 ohms at 110°C (230°F) to 3000 ohms at 25°C (77°F). The main display module measures the resistance value in order to determine the fluid temperature.