Part-number relationships
| Relationship | Reference family | Number |
|---|---|---|
| Primary Manufacturer Part Number | Official Cat sensor reference | 439-5039 |
Excavator Spare Parts
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439-5039 is documented by Cat as a water-in-fuel level sensor assembly including sensor, wiring harness and connector. The manufacturer specifies 12/24V DC and a 183 mm (7.2 in) wire lead and lists 313, 315, 320, 323, 326, 330, 335, 336 and 340 excavator families plus selected tractors, compactors and engines. The part is discontinued, so replacement options require official serial lookup. Confirm the complete number, thread/seal, connector, lead length, filter head and machine serial.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Manufacturer Part Number | Official Cat sensor reference | 439-5039 |
Product fitment guide
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Before ordering
Machine fitment
3 model references
Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.
Quick fitment answers
Recorded compatible model references include Excavator families: Cat 313 / 315 / 320 / 323 / 326 / 330 / 335 / 336 / 340, Additional manufacturer-listed contexts: Cat C2.8 / C3.6 / C4.4 / C7.1, D6K2/D6N and selected compactors, Fitment limitation: Confirm number, thread, seal, connector, lead, filter head and serial. Confirm the complete part number and machine serial range before ordering.
No alternate number is listed for 439-5039. Send the original nameplate for an alternate-number check.
Match the complete part number on the original component. Compare connectors, mounting points and visible dimensions with the product photos. Confirm the exact machine or engine model and serial range before ordering. Send clear photos of the original unit and connector layout when requesting a quote.
Continue comparing verified references from the same system.