"Boom cylinder seal kit for an EC290" sounds specific, but the same EC290 can use different seal kits depending on production year and cylinder supplier. A stamped number like VOE14589129 removes all doubt — it points to exactly one item in Volvo's parts book. This is why professional buyers always order by number, not by photo alone.
Modern Caterpillar part numbers are 7 digits in two blocks. The first block broadly identifies the part family, the second the individual item:
| Example | Part family | Typical application |
|---|---|---|
| 357-5717 | Sleeve / bearing group | Excavator linkage and bucket bushings |
| 093-5156 | Seals and O-rings | Hydraulic cylinders, pumps |
| 10R-3451 | Fuel injectors | C-series engines |
| 1P-1805 | Legacy (old format) numbers | Still valid on older machines |
Older CAT numbers (1P-, 2P-, 3P-, 4T-, 5P-, 6V-, 7X-, 8T-, 9S-…) are still in use and often supersede or are superseded by new-format numbers. Both formats can describe the same physical part.
Volvo construction equipment parts use VOE + 7 digits (e.g. VOE14589129). Each VOE number maps to one row in the official parts catalog (Prosis) for a given machine model — EC140, EC210, EC290, EC360 and so on. When an assembly is revised, a new VOE number is issued, so the number on your old part tells the supplier exactly which revision you have.
Aftermarket suppliers often use their own or OEM reference numbers (e.g. Komatsu 708-2L-23210 for pumps, John Deere RE numbers). A reliable supplier can cross-reference in both directions. What we check before quoting:
Send us one message with the part number + machine model (a photo of the old part or its stamped number is even better). We confirm fitment, stock and price the same day. Our catalog covers 13,100+ SKUs for CAT, Volvo and truck/engine parts — browse it in All Parts.
No. They are adjacent numbers in the same sleeve/bearing group and often used together on the same linkage, but they are different sizes and positions. Order each number separately.
Only if a cross-reference exists. Some suppliers manufacture the same item under both numbers, but fitment must be verified per machine — send both numbers and we will check.
Send the photo with the machine model and serial number. For wear parts we can usually match by dimensions (measure bore, width, height in mm).
Quality suppliers keep the original number on the product page so buyers can search by it. If a seller cannot tell you which original number their part replaces, walk away.
Send it with your machine model — same-day fitment confirmation and quote.