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The CAT Filter Element-Wtr Sep & Fuel, part number 523-6604, is a filter listed under the Filters category. In general terms, a fuel filter or water separator element helps keep contaminants and water out of the fuel before it reaches the engine's fuel system. Filter parts that look alike can differ in ways that matter, so order by the exact part number 523-6604 rather than by name or appearance.
| Brand | CAT |
|---|---|
| Part number | 523-6604 |
| Store SKU | 8230372 |
| Part type | Filter Element-Wtr Sep & Fuel |
Machine models are not listed on this page. Check part number 523-6604 against the machine's parts book, or send the model and serial number through the quote form so the parts team can confirm fitment.
Match part number 523-6604 to the number in your machine's parts book or to the number on the old part. If you cannot confirm it, send the machine model and serial number through the quote form and the parts team will check it for you.
In general, this type of element is part of the fuel system's filtration. It helps remove dirt and other contaminants from the fuel, and helps separate water from it, before the fuel reaches components downstream.
Common signs include hard starting, loss of power under load, rough running or stumbling, and a restricted fuel flow. Water or debris showing up in the fuel system can also point to a filter that needs attention. Follow the machine's service manual for replacement guidance.
Have the part number (523-6604), the machine model and serial number, and the quantity you need. That lets the parts team confirm the part quickly.
No. The store SKU (8230372) is RTL Equipment's own listing reference. The part number is 523-6604, and that is the number to use when checking a parts book or ordering.
