Don't forget about time difference!
Very important remark: The CAT equipment prefix (first three figures and numbers in serial number) is absolutely necessary information for correct engine identification. But your additional information (full serial number, arrangement number, where the engine is installed etc.) will help to avoid mistakes and save our and your time. Sometimes the full serial number is absolutely essential information also (modification is inside the prefix).
| ID | Model | Description |
| 1808448 | Caterpillar 321 series Excavators | |
| 1808449 | 9CZ | CAT 321B EXCAVATOR 9CZ |
| 1808450 | AKG | CAT 321B EXCAVATOR AKG |
| 1808451 | KGA | CAT 321B EXCAVATOR KGA |
| 1808452 | DAX | CAT 321C EXCAVATOR DAX |
| 1808453 | KBB | CAT 321C EXCAVATOR KBB |
| 1808454 | KCR | CAT 321C EXCAVATOR KCR |
| 1808455 | MCF | CAT 321C EXCAVATOR MCF |
| 1808456 | JCX | CAT 321D CR EXCAVATOR JCX |
| 1808457 | KBH | CAT 321D LCR EXCAVATOR KBH |
| 1808458 | KBZ | CAT 321D LCR EXCAVATOR KBZ |
| 1808459 | MDT | CAT 321D LCR EXCAVATOR MDT |
| 1808460 | MPG | CAT 321D LCR EXCAVATOR MPG |
| 1808461 | NAS | CAT 321D LCR EXCAVATOR NAS |
| 1808462 | PBD | CAT 321D LCR EXCAVATOR PBD |
| 1808463 | TXA | CAT 321D LCR EXCAVATOR TXA |
| 1808464 | Caterpillar 322 series Excavators | |
| 1808465 | 7WL | CAT 322 EXCAVATOR 7WL |
| 1808466 | 8CL | CAT 322 L EXCAVATOR 8CL |
| 1808467 | 8ML | CAT 322 L EXCAVATOR 8ML |
| 1808468 | 9RL | CAT 322 L EXCAVATOR 9RL |
| 1808469 | 4RM | CAT 322 LN EXCAVATOR 4RM |
| 1808470 | 3NR | CAT 322B EXCAVATOR 3NR |
| 1808471 | 8MR | CAT 322B EXCAVATOR 8MR |
| 1808472 | 1AS | CAT 322B L EXCAVATOR 1AS |
| 1808473 | 1BS | CAT 322B L EXCAVATOR 1BS |
| 1808474 | 1YS | CAT 322B L EXCAVATOR 1YS |
| 1808475 | 2ES | CAT 322B L EXCAVATOR 2ES |
| 1808476 | 5CR | CAT 322B L EXCAVATOR 5CR |
| 1808477 | 8NR | CAT 322B L EXCAVATOR 8NR |
| 1808478 | 1ZS | CAT 322B LN EXCAVATOR 1ZS |
| 1808479 | ADX | CAT 322C EXCAVATOR ADX |
| 1808480 | BFK | CAT 322C EXCAVATOR BFK |
| 1808481 | BFN | CAT 322C EXCAVATOR BFN |
| 1808482 | BFX | CAT 322C EXCAVATOR BFX |
| 1808483 | BGR | CAT 322C EXCAVATOR BGR |
| 1808484 | BKJ | CAT 322C EXCAVATOR BKJ |
| 1808485 | BKM | CAT 322C EXCAVATOR BKM |
| 1808486 | BLP | CAT 322C EXCAVATOR BLP |
| 1808487 | BMX | CAT 322C EXCAVATOR BMX |
| 1808488 | BNY | CAT 322C EXCAVATOR BNY |
| 1808489 | BPH | CAT 322C EXCAVATOR BPH |
| 1808490 | BTE | CAT 322C EXCAVATOR BTE |
| 1808491 | BYL | CAT 322C EXCAVATOR BYL |
| 1808492 | C3R | CAT 322C EXCAVATOR C3R |
| 1808493 | CAM | CAT 322C EXCAVATOR CAM |
| 1808494 | CBY | CAT 322C EXCAVATOR CBY |
| 1808495 | DAA | CAT 322C EXCAVATOR DAA |
| 1808496 | EMR | CAT 322C EXCAVATOR EMR |
| 1808497 | FED | CAT 322C EXCAVATOR FED |
| 1808498 | HBG | CAT 322C EXCAVATOR HBG |
| 1808499 | HEK | CAT 322C EXCAVATOR HEK |
| 1808500 | KCF | CAT 322C EXCAVATOR KCF |
| 1808501 | LAR | CAT 322C EXCAVATOR LAR |
| 1808502 | M2H | CAT 322C EXCAVATOR M2H |
| 1808503 | MAR | CAT 322C EXCAVATOR MAR |
| 1808504 | 9JL | CAT 322N EXCAVATOR 9JL |
| 1808505 | Caterpillar 323 series Excavators | |
| 1808506 | SBZ | CAT 323D EXCAVATOR SBZ |
| 1808507 | WNE | CAT 323D EXCAVATOR WNE |
| 1808508 | BYM | CAT 323D L EXCAVATOR BYM |
| 1808509 | JLG | CAT 323D L EXCAVATOR JLG |
| 1808510 | L5Z | CAT 323D L EXCAVATOR L5Z |
| 1808511 | LFL | CAT 323D L EXCAVATOR LFL |
| 1808512 | NDE | CAT 323D L EXCAVATOR NDE |
| 1808513 | PBE | CAT 323D L EXCAVATOR PBE |
| 1808514 | PBM | CAT 323D L EXCAVATOR PBM |
| 1808515 | SDC | CAT 323D L EXCAVATOR SDC |
| 1808516 | WGC | CAT 323D L EXCAVATOR WGC |
| 1808517 | YSD | CAT 323D L EXCAVATOR YSD |
| 1808518 | ZMF | CAT 323D L EXCAVATOR ZMF |
| 1808519 | CWG | CAT 323D LN EXCAVATOR CWG |
| 1808520 | CYD | CAT 323D LN EXCAVATOR CYD |
| 1808521 | RAC | CAT 323D LN EXCAVATOR RAC |
| 1808522 | DKW | CAT 323D S EXCAVATOR DKW |
| 1808523 | SED | CAT 323D S EXCAVATOR SED |
| 1808524 | NES | CAT 323D SA EXCAVATOR NES |
| 1808525 | Caterpillar 324 series Excavators | |
| 1808526 | AWN | CAT 324D EXCAVATOR AWN |
| 1808527 | CJX | CAT 324D EXCAVATOR CJX |
| 1808528 | ECH | CAT 324D EXCAVATOR ECH |
| 1808529 | JZR | CAT 324D EXCAVATOR JZR |
| 1808530 | MND | CAT 324D EXCAVATOR MND |
| 1808531 | T2D | CAT 324D EXCAVATOR T2D |
| 1808532 | BBF | CAT 324D FM EXCAVATOR BBF |
| 1808533 | JGK | CAT 324D FM EXCAVATOR JGK |
| 1808534 | JKR | CAT 324D FM EXCAVATOR JKR |
| 1808535 | BZW | CAT 324D FM LL EXCAVATOR BZW |
| 1808536 | JLS | CAT 324D FM LL EXCAVATOR JLS |
| 1808537 | BTK | CAT 324D L EXCAVATOR BTK |
| 1808538 | BYE | CAT 324D L EXCAVATOR BYE |
| 1808539 | DFP | CAT 324D L EXCAVATOR DFP |
| 1808540 | JAT | CAT 324D L EXCAVATOR JAT |
| 1808541 | JJG | CAT 324D L EXCAVATOR JJG |
| 1808542 | LAB | CAT 324D L EXCAVATOR LAB |
| 1808543 | PYT | CAT 324D L EXCAVATOR PYT |
| 1808544 | SYM | CAT 324D L EXCAVATOR SYM |
| 1808545 | TSN | CAT 324D L EXCAVATOR TSN |
| 1808546 | EJC | CAT 324D LN EXCAVATOR EJC |
| 1808547 | TRH | CAT 324D LN EXCAVATOR TRH |
| 1808548 | PNW | CAT 324E L EXCAVATOR PNW |
| 1808549 | LDG | CAT 324E LN EXCAVATOR LDG |