Caterpillar Part reference
Part number 0056521 is listed in the catalog as a spring. Two catalog occurrences associate it with hydraulic system valve groups on Caterpillar models TK1051 and 615C, listed as a control valve group and a cushion-hitch valve group respectively. These are catalog associations only and do not confirm fitment on any specific machine.
Recorded applications
Selected catalog references that list this part. A catalog association does not confirm fitment for every machine or configuration.
Catalog context
LockedCheck the signed-in Part Book for available diagrams and the complete catalog breakdown.
| Part number | Description |
|---|---|
| 0056521 | spring (current part) |
| 00***23 | poppet; (check valve) |
| 00***64 | plug |
| 09***59 | seal-o-ring (id=34.40mm) |
Selected entries from this catalog unit. Other part numbers are masked. Confirm the full breakdown and your machine configuration before ordering.
View model pageGeneral guidance
In general, a spring is an elastic element that stores mechanical energy and returns to its original shape when a load is released. In hydraulic valve assemblies, springs commonly bias spool or poppet positions, return controls to neutral, or help set pressure or position behavior, but the exact role of this spring must be checked against the catalog.
Reference part number 0056521 exactly as listed when ordering. Before purchasing, confirm the recorded serial number and configuration conditions shown for the associated valve group occurrences, since a catalog association does not guarantee compatibility with every machine configuration.
Catalog references
Locked