Excavator Spare Parts
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Paper wet-friction disc identified by Komatsu part number 120-22-31231 for D30 and D31 oil-type steering-clutch applications. Independent catalogs agree on a two-pass groove, 99 external teeth and published dimensions of 301.5 x 230 x 4.2 mm. Confirm the complete number, machine suffix, disc quantity and steering-clutch arrangement before shipment.
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Equipment Part Number | Komatsu wet steering-clutch friction disc | 120-22-31231 |
| Related Suffix - Verify Machine Revision | Same published construction; not asserted as universal interchange | 120-22-31232 |
| Related Suffix - Verify Machine Revision | Same published construction; not asserted as universal interchange | 120-22-31233 |
| Related Steel Separator Plate - Not Interchange | Companion steering-clutch component | 120-22-31221 |
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
2 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 Verified machine family: Komatsu D30 / D31 oil-type steering clutches, Fitment limitation: Confirm machine suffix, part number, quantity and clutch arrangement. Confirm the complete part number and machine serial range before ordering.
Documented direct interchanges: 120-22-31221. Related assembly numbers (not direct interchanges): 120-22-31232, 120-22-31233.
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.
Continue comparing verified references from the same system.
