6741-81-9220 Oil Level Sensor for Komatsu PC300-8 PC400-8

6741-81-9220 Oil Level Sensor for Komatsu PC300-8 PC400-8

The 6741-81-9220 oil level sensor is installed at the engine oil pan to monitor engine oil level on Komatsu equipment. Key applications include PC300-8 and PC300LC-8 excavators with the SAA6D114E engine family, together with PC400-8 and PC400LC-8 applications using the SAA6D125E engine family.

This is an engine oil level sensor rather than a hydraulic oil level sensor. When replacing the unit, use the old sensor number and oil-pan installation details as the primary reference because 6741-81-9220 is also found across other Komatsu engine and machine applications.

What to Compare Before Ordering a 6741-81-9220 Sensor

The float arm and electrical connection are important parts of the matching process. A sensor may look similar from the outside but still have a different float position, arm travel or mounting arrangement, which can affect the oil-level reading after installation.

• Confirm 6741-81-9220 on the old sensor, packaging or machine parts record.

• Check the complete machine model, such as PC300-8 or PC400-8.

• Compare the float shape, arm length and movement direction.

• Compare the electrical connector and wire arrangement.

• Check the mounting flange and oil-pan installation position before shipment.

6741-81-9220 and 7861-93-4210 Reference Checking

7861-93-4210 is frequently listed with 6741-81-9220 in replacement-parts catalogs and may appear in buyer searches for the same type of Komatsu oil level sensor. However, the two numbers should be checked against the engine and oil-pan configuration before being treated as interchangeable for every application.

If your old part shows 7861-93-4210 rather than 6741-81-9220, send a clear photo of the complete sensor, connector, float and mounting flange together with the machine and engine model. This allows the physical configuration to be compared before quotation.

Check the Oil Pan Seal During Sensor Replacement

The oil-pan parts arrangement using 6741-81-9220 also includes a separate sealing O-ring. Inspect the sealing surface and old O-ring when the sensor is removed, especially if oil leakage is already visible around the mounting area.

Do not confuse the O-ring number 7861-91-4220 with the sensor reference 7861-93-4210. If a seal is also required, confirm it separately from the oil level sensor before ordering.

Information to Send for Fitment Confirmation

For a faster quotation, send the old sensor number, complete Komatsu machine model, engine model if available, and clear photos of the sensor from both sides. If the original number cannot be read, include close-up photos of the connector, float arm and mounting flange.