Kobelco SK250-8 · Cylinder Assembly,Boom · 28 part numbers
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The Cylinder Assembly,Boom is listed without an exploded view in the SK250-8 catalogue — the parts table below is the authoritative reference, and every part number is confirmed against your machine serial before we quote.
Below is the complete Kobelco SK250-8 Cylinder Assembly,Boom — 28 part numbers with the quantity fitted per assembly. Take the callout number from the drawing and match it in the Ref. column below. All numbers are taken from the machine's own parts catalogue — nothing here is generic.
| Ref. | Part No. | Description | Qty / Assy |
|---|---|---|---|
| LQ01V00028F1 | CYLINDER ASSY,BOOM | ||
| 3 | LQ01V00028S003 | CYLINDER HEAD | 1 |
| 4 | 2438U1018S4 | BUSHING | 1 |
| 5 | 2438U776S5 | RING,RETAINING | 1 |
| 6 | YN01V00175S006 | RING,BUFFER | 1 |
| 7 | YN01V00175S007 | U-RING | 1 |
| 8 | YN01V00105S008 | RING,BACK UP | 1 |
| 9 | 2438U776S9 | RING,WIPER | 1 |
| 10 | ZD12G13000 | O-RING | 1 |
| 11 | LQ01V00001S011 | RING,BACK UP | 1 |
| 12 | ZS23C18080 | CAPSCREW | 12 |
| 13 | LQ01V00028S013 | BEARING,CUSHION | 1 |
| 14 | YN01V00105S014 | SEAL,CUSHION | 1 |
| 15 | YN01V00175S015 | PISTON | 1 |
| 16 | LQ01V00001S016 | RING,SEAL | 1 |
| 17 | LQ01V00001S017 | RING,BACK UP | 2 |
| 18 | YN01V00175S018 | RING,SLIDE | 2 |
| 19 | LQ01V00001S019 | RING,SLIDE | 2 |
| 20 | 2438U953S21 | SETSCREW | 1 |
| 21 | 2436R624S6 | BALL | 1 |
| 22 | LQ12B01476P1 | PIN,BUSHING | 4 |
| 23 | 2438U1381S24 | RING,WIPER | 4 |
| YN01V00175R100 | REPAIR KIT | 1 | |
| . | (CONSISTS OF BELOW) | ||
| LQ01V00028R200 | REPAIR KIT | 1 | |
| LQ01V00028R300 | REPAIR KIT | 1 | |
| LQ01V00028R400 | REPAIR KIT | 1 | |
| LQ01V00028R500 | REPAIR KIT | 1 |
Listed for the Kobelco SK250-8 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.
Structurally, these 28 numbers fall into 7 Kobelco number series — LQ01V, YN01V, 2438U among the largest. The list is weighted toward repeated items such as ring, repair, kit and 2 hardware positions.
Three numbers worth noting first: ZS23C18080 (capscrew, ×12 per assembly); LQ12B01476P1 (pin,bushing, ×4 per assembly); 2438U1381S24 (ring,wiper, ×4 per assembly). The full list follows below.
Swing, travel and implement circuits share the same pump flow on the Kobelco SK250-8, which is why a fault in one function can point back to a component listed in this group. A pressure test narrows the circuit down; the drawing then narrows it to a part number.
Working from the exploded view is the fastest way to order. Find the component on the drawing, note its callout number, and take the matching reference from the table — that mapping removes the guesswork that comes with describing a part over the phone or in an email.
Both. Every quotation states the condition of each item — genuine through original supply channels, or a quality OEM alternative — so the choice is yours and it is documented. On the Kobelco SK250-8, that usually comes back to ZS23C18080 (capscrew) in this group.
We quote new components from this table — genuine or OEM by declaration — rather than exchange units, so you know exactly what is being fitted.
Slow or drifting functions, a circuit that weakens as the oil warms, noise under load, and external leakage at joints are the usual reports. Pressure testing points to the circuit; the drawing callouts then point to the part.
Tank Instal,Hyd
View Parts ListMotor Instal,Swing
View Parts ListHyd Lines,Pump (Suction Deliverty)
View Parts ListHyd Lines,Upp (Main)
View Parts ListFilter List
View Parts ListFrame Assy,Upp
View Parts ListCounterweight Instal
View Parts ListEngine Assy
View Parts ListKobelco SK250-8 workshop guide
Read the guideKobelco workshop guide
Read the guideKobelco workshop guide
Read the guideRepair guides written from our own workshop notes on the Kobelco SK250-8 — the same components listed on this page, with the failure patterns and part numbers we see most often from trade customers.