Kobelco SK240-12 · Track Idler Assembly · 26 part numbers
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The Track Idler 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.
The Track Idler Assembly group on the Kobelco SK240-12 contains 26 separately orderable part numbers. Callout numbers on the exploded view map one-to-one to the Ref. column in the table. Every entry is a genuine Kobelco part number, confirmed against the serial range before we quote.
| Ref. | Part No. | Description | Qty / Assy |
|---|---|---|---|
| YN52D00116F1 | IDLER ASSY, CRAWLER | ||
| 1 | YN52D00117F1 | IDLER ASSY, CRAWLER | 2 |
| 1 1 - | YN52D00118F1 | IDLER ASSY | 1 |
| 1 1A - | YN52D00119P1 | IDLER | 1 |
| 1 1B - | 2405P482 | BUSHING | 2 |
| 1 1C - | YN52D01065P1 | COLLAR | 2 |
| 1 1D - | 2445R442F1 | SEAL, FLOATING | 2 |
| 1 -1Da | 2445R442S1 | SEAL | 2 |
| 1 1Db - | 2445R442S2 | O RING - | 2 |
| 1 1E - | YN52D01008P1 | PIN | 2 |
| 1 1F - | YN52D01066P1 | SHAFT | 1 |
| 1 1G - | ZD11G07000 | O RING - | 2 |
| 1 1H - | PV52D01007P1 | PLUG | 2 |
| 1 2 - | YN54D00033F1 | IDLER ADJUST ASSY | 1 |
| 1 2A - | YN70V00006P2 | CYLINDER, GREASE | 1 |
| 1 2B - | YN54D01069P1 | BRACKET | 1 |
| 1 2C - | YN54D01038P1 | NUT | 1 |
| 1 2D - | ZP26D08080 | SPRING PIN | 1 |
| 1 2E - | YN54D01072P1 | SPRING | 1 |
| 1 2F - | YN01V01121P1 | PISTON | 1 |
| 1 2G - | YN54D01042P1 | COLLAR | 1 |
| 1 2H - | ZD12G08000 | O RING - | 1 |
| 1 2J - | 2418U130D35 | U PACKING - | 1 |
| 1 2K - | LQ54D01037P1 | PIN | 2 |
| 1 3 - | ZS13C16045 | CAPSCREW | 2 |
| 1 4 - | 2444P803 | NIPPLE | 1 |
Factory part numbers as fitted to the Kobelco SK240-12 excavator. "Ref." matches the callout number on the exploded view where one is shown.
Structurally, these 26 numbers fall into 14 Kobelco number series — YN52D, YN54D, 2445R among the largest. Expect repeated items such as idler, ring, pin and 3 hardware positions when you work through it.
Where to start in this table: YN52D00117F1 (idler assy, crawler, ×2 per assembly); 2405P482 (bushing, ×2 per assembly); YN52D01065P1 (collar, ×2 per assembly). The full list follows below.
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.
The callout numbers on the exploded view map one-to-one to the Ref. column in the parts table. Identify the joint or component on the drawing, take its number from the table, and the quotation you receive will match the drawing exactly.
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. In this group, YN52D00117F1 is the number most often quoted for that enquiry.
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.
They are the catalogue quantities per assembly — the number of that item fitted to one complete group, which is exactly how a rebuild order is planned.
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.