Caterpillar Part reference
This page covers part number 0306121, catalogued as a ring-back-up. The catalog associates this number with hydraulic system listings for Caterpillar 35 and Caterpillar 45 entries, which are recorded as occurrences rather than confirmed fitment. Check the recorded conditions before ordering.
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 |
|---|---|
| 0306121 | ring-back-up (current part) |
| 10***02 | kit-receptacle; (2-pin)(engine sensor wiring harness) |
| 11***68 | valve group-solenoid |
| 11***19 | coil as |
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 back-up ring is a small rigid ring fitted beside a seal in a groove to help the seal resist extrusion under pressure and keep its shape. Its exact material, dimensions and supplied contents are not stated in the catalog record for this number.
Confirm part number 0306121 against your hydraulic component and the catalog record before ordering. The catalog associations listed here are linked to larger solenoid valve assemblies, so verify that the recorded machine and serial conditions match your unit.
Catalog references
Locked