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. Sometimes the full serial number is absolutely essential information also (modification is inside the prefix).
| ID | Model | Description |
| 1801100 | Caterpillar Challenger tractors | |
| 1801101 | AKN | CAT tractor MT735 CHALLENGER AKN |
| 1801102 | ALA | CAT tractor MT745 CHALLENGER ALA |
| 1801103 | ALM | CAT tractor MT755 CHALLENGER ALM |
| 1801104 | AMS | CAT tractor MT765 CHALLENGER AMS |
| 1801105 | BAM | CAT tractor MT835 CHALLENGER BAM |
| 1801106 | BBP | CAT tractor MT845 CHALLENGER BBP |
| 1801107 | BCC | CAT tractor MT855 CHALLENGER BCC |
| 1801108 | BDS | CAT tractor MT865 CHALLENGER BDS |
| 1801109 | 812 | CAT tractor MTC735 CHALLENGER 812 |
| 1801110 | 813 | CAT tractor MTC745 CHALLENGER 813 |
| 1801111 | 814 | CAT tractor MTC755 CHALLENGER 814 |
| 1801112 | 815 | CAT tractor MTC765 CHALLENGER 815 |
| 1801113 | 816 | CAT tractor MTC835 CHALLENGER 816 |
| 1801114 | 817 | CAT tractor MTC845 CHALLENGER 817 |
| 1801115 | 818 | CAT tractor MTC855 CHALLENGER 818 |
| 1801116 | 819 | CAT tractor MTC865 CHALLENGER 819 |
| 1801117 | 3HS | CAT tractor 35 CHALLENGER 3HS |
| 1801118 | 8DN | CAT tractor 35 CHALLENGER 8DN |
| 1801119 | 8RD | CAT tractor 35 CHALLENGER 8RD |
| 1801120 | 9DF | CAT tractor 35 CHALLENGER 9DF |
| 1801121 | ADK | CAT tractor 35 CHALLENGER ADK |
| 1801122 | 1DR | CAT tractor 45 CHALLENGER 1DR |
| 1801123 | 3BK | CAT tractor 45 CHALLENGER 3BK |
| 1801124 | 4DZ | CAT tractor 45 CHALLENGER 4DZ |
| 1801125 | 4KW | CAT tractor 45 CHALLENGER 4KW |
| 1801126 | ABF | CAT tractor 45 CHALLENGER ABF |
| 1801127 | 3SM | CAT tractor 55 CHALLENGER 3SM |
| 1801128 | 5DK | CAT tractor 55 CHALLENGER 5DK |
| 1801129 | 6NN | CAT tractor 55 CHALLENGER 6NN |
| 1801130 | 7DM | CAT tractor 55 CHALLENGER 7DM |
| 1801131 | 7TZ | CAT tractor 55 CHALLENGER 7TZ |
| 1801132 | AEN | CAT tractor 55 CHALLENGER AEN |
| 1801133 | 7YC | CAT tractor 65 CHALLENGER 7YC |
| 1801134 | 7YC | CAT tractor 65B CHALLENGER 7YC |
| 1801135 | 2ZJ | CAT tractor 65C CHALLENGER 2ZJ |
| 1801136 | 2ZJ | CAT tractor 65D CHALLENGER 2ZJ |
| 1801137 | 1GM | CAT tractor 65E CHALLENGER 1GM |
| 1801138 | 6GS | CAT tractor 65E CHALLENGER 6GS |
| 1801139 | 2YL | CAT tractor 70C CHALLENGER 2YL |
| 1801140 | 4CJ | CAT tractor 75 CHALLENGER 4CJ |
| 1801141 | 4KK | CAT tractor 75C CHALLENGER 4KK |
| 1801142 | 5AR | CAT tractor 75D CHALLENGER 5AR |
| 1801143 | 1HM | CAT tractor 75E CHALLENGER 1HM |
| 1801144 | 6HS | CAT tractor 75E CHALLENGER 6HS |
| 1801145 | 9TK | CAT tractor 85C CHALLENGER 9TK |
| 1801146 | 4GR | CAT tractor 85D CHALLENGER 4GR |
| 1801147 | 1NM | CAT tractor 85E CHALLENGER 1NM |
| 1801148 | 6JS | CAT tractor 85E CHALLENGER 6JS |
| 1801149 | 1SM | CAT tractor 95E CHALLENGER 1SM |
| 1801150 | 6KS | CAT tractor 95E CHALLENGER 6KS |
| 1801200 | Caterpillar Lexion Combines | |
| 1801201 | 9FW | CAT LEXION 460 COMBINE 9FW (engine only) |
| 1801202 | 3HZ | CAT LEXION 465 COMBINE 3HZ (engine only) |
| 1801203 | 2BZ | CAT LEXION 480 COMBINE 2BZ (engine only) |
| 1801204 | 8ZW | CAT LEXION 485 COMBINE 8ZW (engine only) |
| 1801205 | Caterpillar Trailers | |
| 1801206 | 8XK | CAT VFS50 TRAILER 8XK |
| 1801207 | 7XN | CAT VFS70 TRAILER 7XN |
| 1801210 | Caterpillar In-Line Rippers | |
| 1801211 | LRA | CAT TL2 530 IN-LINE RIPPER LRA |
| 1801212 | LRB | CAT TL2 730 IN-LINE RIPPER LRB |
| 1801213 | LRC | CAT TL2 730 IN-LINE RIPPER LRC |
| 1801214 | LRD | CAT TL2 930 IN-LINE RIPPER LRD |
| 1801220 | Caterpillar Disk Rippers | |
| 1801221 | DRA | CAT TL3 530 DISK RIPPER DRA |
| 1801222 | DRB | CAT TL3 730 DISK RIPPER DRB |
| 1801223 | DRC | CAT TL3 730 DISK RIPPER DRC |
| 1801224 | DRD | CAT TL3 930 DISK RIPPER DRD |
| 1801230 | Caterpillar Soil Finishers | |
| 1801231 | SFA | CAT TL4 24 SOIL FINISHER SFA |
| 1801232 | SFB | CAT TL4 27 SOIL FINISHER SFB |
| 1801233 | SFC | CAT TL4 31 SOIL FINISHER SFC |
| 1801234 | SFD | CAT TL4 36 SOIL FINISHER SFD |
| 1801235 | SFE | CAT TL4 42 SOIL FINISHER SFE |
| 1801236 | SFF | CAT TL4 45 SOIL FINISHER SFF |
| 1801240 | Caterpillar Field Cultivators | |
| 1801241 | FCA | CAT TL5 30 FIELD CULTIVATOR FCA |
| 1801242 | FCB | CAT TL5 32 FIELD CULTIVATOR FCB |
| 1801243 | FCC | CAT TL5 34 FIELD CULTIVATOR FCC |
| 1801244 | FCE | CAT TL5 36 FIELD CULTIVATOR FCE |
| 1801245 | FCF | CAT TL5 38 FIELD CULTIVATOR FCF |
| 1801246 | FCG | CAT TL5 40 FIELD CULTIVATOR FCG |
| 1801247 | FCH | CAT TL5 42 FIELD CULTIVATOR FCH |
| 1801248 | FCJ | CAT TL5 44 FIELD CULTIVATOR FCJ |
| 1801249 | FCK | CAT TL5 46 FIELD CULTIVATOR FCK |
| 1801250 | FCL | CAT TL5 48 FIELD CULTIVATOR FCL |
| 1801251 | FCM | CAT TL5 50 FIELD CULTIVATOR FCM |