Kobelco SK240-12 · Arm Assembly · 22 part numbers
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The Arm Assembly 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.
This page lists all 22 part numbers in the Kobelco SK240-12 Arm Assembly. 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 |
|---|---|---|---|
| YN12B10590F1 | ARM GROUP | ||
| 1 | YN12B11871F1 | LINK, BUCKET | 1 |
| 1 2 - | YN12B02403P1 | BUSHING | 2 |
| 1 3 - | YN12B02405P1 | BUSHING | 2 |
| 2 | YN12B11604P1 | LINK | 1 |
| 3 | YN12B01228P1 | LINK | 1 |
| 4 | YN12B11524P1 | PIN | 2 |
| 5 | YN12B11522P1 | PIN | 1 |
| 6 | YN12B11520P1 | PIN | 1 |
| 7 | HS18C20145G2 | CAPSCREW | 2 |
| 9 | ZN18C20016 | NUT | 4 |
| 10 | 2445R220D4 | SEAL, DUST | 6 |
| 11 | ZG91S02000 | NIPPLE, GREASE | 5 |
| 12 | ZG91S04000 | NIPPLE, GREASE | 2 |
| 13 | B16T0442D57 | SHIM (0.5) | 1 |
| 14 | B16T0442D44 | SHIM (0.9) | 1 |
| 15 | B16T0442D2 | SHIM (1.6) | 1 |
| 16 | YN12B01122D1 | SHIM (0.5) | 2 |
| 17 | YN12B01122D2 | SHIM (0.9) | 2 |
| 18 | YN12B01122D3 | SHIM (1.6) | 2 |
| 19 | YN12B01601D1 | SHIM (2.0) | 4 |
| 20 | YN12B01602D1 | SHIM (2.0) | 2 |
Listed for the Kobelco SK240-12 excavator. Every number can be quoted on its own or as a complete set, and fitment is confirmed from your machine serial before we price it.
Read as a dataset, the 22 part numbers spread across 6 number series (YN12B, B16T, ZG91S being the biggest) The list is weighted toward repeated items such as shim, link, pin and 2 hardware positions.
Three numbers worth noting first: 2445R220D4 (seal, dust, ×6 per assembly); ZG91S02000 (nipple, grease, ×5 per assembly); ZN18C20016 (nut, ×4 per assembly). The full list follows below.
Structural groups rarely fail as castings; what wears is everything pinned, bolted and clamped to them. That is what makes this group the practical one to work from — pins, bushings, retaining hardware and the mounting points that take the working load every cycle of the machine.
Structural repairs are usually planned against measured wear rather than a fixed interval. Pins and bushings are the items to measure first; the retaining hardware in this group is cheap to replace at the same time and is worth adding to the same shipment.
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. On the Kobelco SK240-12, that usually comes back to 2445R220D4 (seal, dust) in this group.
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.
Yes. Send the serial number and which joints are loose, and we assemble the pin, bushing and hardware list into one quotation with everything consolidated into a single shipment.
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.