Kobelco SK240-12 · Arm Assembly — Group 2 · 22 part numbers
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The Arm Assembly — Group 2 is listed without an exploded view in the SK240-12 catalogue — the parts table below is the authoritative reference, and every part number is confirmed against your machine serial before we quote.
The Kobelco SK240-12 Arm Assembly — Group 2 breaks down into 22 individually orderable part numbers. Callout numbers on the exploded view map one-to-one to the Ref. column in the table. The list comes straight from the Kobelco SK240-12 catalogue for this machine family.
| Ref. | Part No. | Description | Qty / Assy |
|---|---|---|---|
| YN12B10703F1 | ARM GROUP | ||
| 1 | YN12B11871F1 | LINK, BUCKET | 1 |
| 1 2 - | YN12B02403P1 | BUSHING | 2 |
| 1 3 - | YN12B02405P1 | BUSHING | 2 |
| 2 | YN12B11572P1 | LINK | 1 |
| 3 | YN12B01322P1 | LINK | 1 |
| 4 | YN12B11524P1 | PIN | 2 |
| 5 | YN12B11522P1 | PIN | 1 |
| 6 | YN12B11520P1 | PIN | 1 |
| 7 | HS18C20145G2 | CAPSCREW | 2 |
| 8 | ZN18C20016 | NUT | 4 |
| 9 | 2445R220D4 | SEAL, DUST | 6 |
| 10 | ZG91S02000 | NIPPLE, GREASE | 5 |
| 11 | ZG91S04000 | NIPPLE, GREASE | 2 |
| 12 | B16T0442D57 | SHIM (0.5) | 1 |
| 13 | B16T0442D44 | SHIM (0.9) | 1 |
| 14 | B16T0442D2 | SHIM (1.6) | 1 |
| 15 | YN12B01122D1 | SHIM (0.5) | 2 |
| 16 | YN12B01122D2 | SHIM (0.9) | 2 |
| 17 | YN12B01122D3 | SHIM (1.6) | 2 |
| 18 | YN12B01601D1 | SHIM (2.0) | 4 |
| 19 | YN12B01602D1 | SHIM (2.0) | 2 |
Part numbers as fitted to the Kobelco SK240-12 excavator. Where a position changed during the production run, the serial number settles which one applies to your machine.
The 22 entries group into 6 distinct number series, led by YN12B, B16T. The list is weighted toward repeated items such as shim, link, pin and 2 hardware positions.
The high-quantity positions are: 2445R220D4 (seal, dust, ×6 per assembly); ZG91S02000 (nipple, grease, ×5 per assembly); ZN18C20016 (nut, ×4 per assembly). The full list follows below.
Where the attachment configuration differs — long boom, heavy-duty arm, alternative bucket — the pin and bushing numbers change with it. The serial number on the machine is the reliable way to pick the right line from this table.
Items in this group are quoted with the condition declared — genuine through original supply channels, or a quality OEM alternative. For heavy sections the freight is quoted separately so you can see the landed cost before committing.
On several Kobelco SK240-12 variants they do — pin and bushing part numbers changed with the attachment configuration. Send the serial number and we confirm the correct group before quoting. If that matches your case, quote 2445R220D4 and we will take it from there.
Yes — we cover the Kobelco range beyond the Kobelco SK240-12. Send the model or the part number from the worn part and we will identify and quote it.
Progressive play at a joint, knocking when the attachment changes direction under load, and visible oval wear on a pin are the usual signs. Measuring play at each joint tells you which positions are due — each has its own part number in the table above.
Upper Frame Assembly
View Parts ListCounterweight Mounting (Tropical Spec, Heavy Counterweight 5.10T, Eagle-Eye View Ready)
View Parts ListArm Rest
View Parts ListUndercarriage Assembly (Long Crawler)
View Parts ListFilter List
View Parts ListUndercarriage Parts List
View Parts ListNut Part Numbers
View Parts ListBushing Part Numbers
View Parts ListKobelco SK240-12 workshop guide
Read the guideKobelco SK240-12 workshop guide
Read the guideRepair guides written from our own workshop notes on the Kobelco SK240-12 — the same components listed on this page, with the failure patterns and part numbers we see most often from trade customers.