A filter is defined by its threading or sealing method, its outside diameter, its inside diameter, its height, and its media and bypass specification. Match all of those and the filter is equivalent; match only the thread and you have a filter that screws on and may not protect the machine. Build the cross-reference from the machine model and serial number first, then confirm the physical dimensions, and never accept a substitution that changes the bypass pressure on a return filter.
What defines a filter
| Property | Why it decides compatibility |
|---|---|
| Thread or seal arrangement | Determines whether it fits at all. Spin-on thread pitch and gasket diameter must match. |
| Outside diameter and height | Determines whether it clears the housing, the frame and the adjacent component. |
| Inside diameter (cartridge types) | Must match the center tube or spigot exactly; a loose fit bypasses unfiltered oil. |
| Media rating | Determines what the filter removes. A coarser filter protects the component less. |
| Bypass valve setting | Changes when oil bypasses the element. Wrong on a return filter means unfiltered oil at pressure. |
| Water drain or sensor port | Fuel filters only. Missing port leaves a warning that cannot be cleared. |
Need the parts this covers?
Send the machine model, serial number and the part numbers you need. We confirm fitment before payment and state the grade of every line — genuine, OEM-quality or aftermarket.
Request a quoteFrequently asked
Can I use any filter with the same thread?
No. Thread match means the filter will screw on; it says nothing about filtration rating, bypass pressure or height clearance. On a return filter, an incorrect bypass setting means oil bypasses the element under exactly the conditions where filtration matters most. Match the specification, not just the thread.
Why does the same machine model take a different filter in different years?
Because filter housings and hydraulic systems are revised between builds, and the revision point is recorded against the serial number. This is normal and not a sign that the reference you were given is wrong; it is a sign that the model name alone is not enough to identify the part.
Is an aftermarket filter safe to use?
A filter made to the correct specification by a known manufacturer is a reasonable purchase, and many excavator owners use them routinely. The risk is in unbranded filters where neither the media rating nor the bypass setting can be verified. On the suction side and on high-pressure circuits that risk is not worth taking; on a return filter from a known maker it often is.