Excavator Engine Parts
Brand illustration · Exact product photo available on request.
125-8274 is a 90A FKM fuel-injector O-ring with a published 7.59 mm inside diameter and 2.62 mm cross section. It is listed for selected 3114, 3116 and 3126 engine arrangements. Confirm the seal position and engine arrangement before ordering. The displayed EexcavaStart package is a catalog illustration, not a photograph of the supplied product.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Cat Part Number | Official fuel-injector O-ring identity | 125-8274 |
| Same-number Formatting Variant | Search alias only | 1258274 |
| Related Fuel-System Seal - Not Interchangeable | Manufacturer record lists it as frequently bought together | 114-8718 |
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
4 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 Official Cat Engine Families: 3114 / 3116 / 3126, Representative Cat Excavators: 320B / 322 / 322B / 325 / 325B / M318 / M320, Other Official Applications: Selected loaders, graders, tractors, compactors, pavers and other equipment listed by Cat, Fitment Limitation: Confirm 125-8274, 7.59 mm ID, seal position, engine arrangement and machine serial. Confirm the complete part number and machine serial range before ordering.
Documented direct interchanges: 114-8718. Formatting aliases for the same number: 1258274.
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.
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