163-6700 1636700 Fuel Tank Level Sensor for Caterpillar Excavator

163-6700 Fuel Level Sensor for CAT 320C 320D Excavators

The 163-6700 fuel level sensor is used to monitor fuel level in Caterpillar equipment fuel tanks. It is commonly identified as a fuel level sensor, fuel tank sender or fuel level sender and is used on machines including CAT 320C and 320D excavators.

Caterpillar lists 163-6700 across a much wider range of equipment, including selected 312C, 312D, 315C, 315D, 318C, 319C, 319D, 321C, 321D LCR, 322C, 323D, 324D, 325C, 325D, 329D, 330C, 330D, 336D and 345C applications. Because the mounting arrangement can vary between fuel tanks and machine configurations, the complete machine model and old sensor should still be checked before ordering.

How to Confirm a 163-6700 Fuel Tank Sensor Before Ordering

The part number is the best starting point, but older excavators may have had fuel tanks, wiring or sensors replaced during previous repairs. If the old sensor still carries 163-6700, send a clear photo together with the machine model for comparison.

If the number cannot be read, compare the complete sensor rather than ordering only from the machine model. The float arm and mounting details are particularly important because a sensor that mounts correctly can still give an incorrect fuel-level reading if its float travel does not match the fuel tank.

• Complete CAT machine model and serial number if available.

• Old sensor part number or identification photo.

• Float arm length, shape and movement direction.

• Electrical connector and wire arrangement.

• Mounting flange, screw pattern and fuel-tank installation position.

320C Fuel Level Sender Electrical Check Reference

For CAT 320C troubleshooting, service electrical information identifies 163-6700 as the fuel level sender and gives an approximate resistance reference of 8 ohms at full and 83.5 ohms at empty.

These values are useful when checking whether an incorrect fuel-level indication may be related to the sender, wiring or monitor circuit. They should be treated as a 320C diagnostic reference rather than a universal specification for every machine using 163-6700.

Check the Gasket and Connector During Replacement

Fuel-tank parts diagrams associated with 163-6700 also show a separate sealing gasket and electrical connector components. Inspect the old gasket condition, connector terminals and wiring before installation instead of replacing only the sender when these parts are damaged or corroded.

If you are unsure whether the sensor matches your fuel tank, send photos of the removed 163-6700 sensor, connector, float arm and mounting flange. These details allow a more useful pre-shipment comparison than machine model information alone.