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 |
| 1808137 | Caterpillar 231 series Excavators | |
| 1808138 | 1NK | CAT 231D EXCAVATOR 1NK |
| 1808139 | 5WJ | CAT 231D EXCAVATOR 5WJ |
| 1808140 | Caterpillar 235 series Excavators | |
| 1808141 | 32K | CAT 235 EXCAVATOR 32K |
| 1808142 | 62X | CAT 235 EXCAVATOR 62X |
| 1808143 | 64R | CAT 235 EXCAVATOR 64R |
| 1808144 | 81X | CAT 235 EXCAVATOR 81X |
| 1808145 | 83X | CAT 235 EXCAVATOR 83X |
| 1808146 | 1FD | CAT 235B EXCAVATOR 1FD |
| 1808147 | 4ED | CAT 235B EXCAVATOR 4ED |
| 1808148 | 7WC | CAT 235B EXCAVATOR 7WC |
| 1808149 | 9PC | CAT 235B EXCAVATOR 9PC |
| 1808150 | 2PG | CAT 235C EXCAVATOR 2PG |
| 1808151 | 3WG | CAT 235C EXCAVATOR 3WG |
| 1808152 | 5AF | CAT 235C EXCAVATOR 5AF |
| 1808153 | 8KJ | CAT 235D EXCAVATOR 8KJ |
| 1808154 | 8TJ | CAT 235D EXCAVATOR 8TJ |
| 1808155 | Caterpillar 245 series Excavators | |
| 1808156 | 82X | CAT 245 EXCAVATOR 82X |
| 1808157 | 84X | CAT 245 EXCAVATOR 84X |
| 1808158 | 94L | CAT 245 EXCAVATOR 94L |
| 1808159 | 95V | CAT 245 EXCAVATOR 95V |
| 1808160 | 1SJ | CAT 245B EXCAVATOR 1SJ |
| 1808161 | 6MF | CAT 245B EXCAVATOR 6MF |
| 1808162 | 4LK | CAT 245D EXCAVATOR 4LK |
| 1808163 | 7ZJ | CAT 245D EXCAVATOR 7ZJ |
| 1808164 | Caterpillar 307 series Excavators | |
| 1808165 | 2PM | CAT 307 EXCAVATOR 2PM |
| 1808166 | 2WM | CAT 307 EXCAVATOR 2WM |
| 1808167 | 5CW | CAT 307B EXCAVATOR 5CW |
| 1808168 | 6KZ | CAT 307B EXCAVATOR 6KZ |
| 1808169 | 7DZ | CAT 307B EXCAVATOR 7DZ |
| 1808170 | AFB | CAT 307B EXCAVATOR AFB |
| 1808171 | BCM | CAT 307C EXCAVATOR BCM |
| 1808172 | BNE | CAT 307C EXCAVATOR BNE |
| 1808173 | Caterpillar 308 series Excavators | |
| 1808174 | KCX | CAT 308C EXCAVATOR KCX |
| 1808175 | Caterpillar 311 series Excavators | |
| 1808176 | 2KM | CAT 311 EXCAVATOR 2KM |
| 1808177 | 9LJ | CAT 311 EXCAVATOR 9LJ |
| 1808178 | 2LS | CAT 311B EXCAVATOR 2LS |
| 1808179 | 8GR | CAT 311B EXCAVATOR 8GR |
| 1808180 | 9MR | CAT 311B EXCAVATOR 9MR |
| 1808181 | CKE | CAT 311C EXCAVATOR CKE |
| 1808182 | CLK | CAT 311C EXCAVATOR CLK |
| 1808183 | PAD | CAT 311C EXCAVATOR PAD |
| 1808184 | AKW | CAT 311D LRR EXCAVATOR AKW |
| 1808185 | CLA | CAT 311D LRR EXCAVATOR CLA |
| 1808186 | DDW | CAT 311D LRR EXCAVATOR DDW |
| 1808187 | DWR | CAT 311D LRR EXCAVATOR DWR |
| 1808188 | LKA | CAT 311D LRR EXCAVATOR LKA |
| 1808189 | PNJ | CAT 311D LRR EXCAVATOR PNJ |
| 1808190 | Caterpillar 312 series Excavators | |
| 1808191 | 6BL | CAT 312 EXCAVATOR 6BL |
| 1808192 | 6GK | CAT 312 EXCAVATOR 6GK |
| 1808193 | 2NS | CAT 312B EXCAVATOR 2NS |
| 1808194 | 3ES | CAT 312B EXCAVATOR 3ES |
| 1808195 | 6SW | CAT 312B EXCAVATOR 6SW |
| 1808196 | 9GR | CAT 312B EXCAVATOR 9GR |
| 1808197 | 9HR | CAT 312B EXCAVATOR 9HR |
| 1808198 | 9NW | CAT 312B EXCAVATOR 9NW |
| 1808199 | 2KW | CAT 312B L EXCAVATOR 2KW |
| 1808200 | 3FS | CAT 312B L EXCAVATOR 3FS |
| 1808201 | 8JR | CAT 312B L EXCAVATOR 8JR |
| 1808202 | 9FS | CAT 312B L EXCAVATOR 9FS |
| 1808203 | BNN | CAT 312C EXCAVATOR BNN |
| 1808204 | BWH | CAT 312C EXCAVATOR BWH |
| 1808205 | CAE | CAT 312C EXCAVATOR CAE |
| 1808206 | CBA | CAT 312C EXCAVATOR CBA |
| 1808207 | DBN | CAT 312C EXCAVATOR DBN |
| 1808208 | FDS | CAT 312C EXCAVATOR FDS |
| 1808209 | CBA | CAT 312C L EXCAVATOR CBA |
| 1808210 | CBT | CAT 312C L EXCAVATOR CBT |
| 1808211 | DLP | CAT 312D EXCAVATOR DLP |
| 1808212 | FBJ | CAT 312D EXCAVATOR FBJ |
| 1808213 | HCW | CAT 312D EXCAVATOR HCW |
| 1808214 | HJX | CAT 312D EXCAVATOR HJX |
| 1808215 | KCD | CAT 312D EXCAVATOR KCD |
| 1808216 | LRK | CAT 312D EXCAVATOR LRK |
| 1808217 | PHH | CAT 312D EXCAVATOR PHH |
| 1808218 | RHL | CAT 312D EXCAVATOR RHL |
| 1808219 | JBC | CAT 312D L EXCAVATOR JBC |
| 1808220 | KES | CAT 312D L EXCAVATOR KES |
| 1808221 | L5W | CAT 312D L EXCAVATOR L5W |
| 1808222 | RKF | CAT 312D L EXCAVATOR RKF |
| 1808223 | TGY | CAT 312D L EXCAVATOR TGY |
| 1808224 | XGK | CAT 312D L EXCAVATOR XGK |
| 1808225 | Caterpillar 313 series Excavators | |
| 1808226 | 9PR | CAT 313B EXCAVATOR 9PR |
| 1808227 | AEX | CAT 313B EXCAVATOR AEX |
| 1808228 | BAS | CAT 313B EXCAVATOR BAS |
| 1808229 | HGF | CAT 313C EXCAVATOR HGF |
| 1808230 | WSA | CAT 313C SR EXCAVATOR WSA |
| 1808231 | LCE | CAT 313D CR EXCAVATOR LCE |
| 1808232 | LBR | CAT 313D SR EXCAVATOR LBR |
| 1808233 | Caterpillar 314 series Excavators | |
| 1808234 | KHB | CAT 314C EXCAVATOR KHB |
| 1808235 | KJA | CAT 314C EXCAVATOR KJA |
| 1808236 | PCA | CAT 314C EXCAVATOR PCA |
| 1808237 | SNY | CAT 314C EXCAVATOR SNY |
| 1808238 | MFK | CAT 314D CR EXCAVATOR MFK |
| 1808239 | PDP | CAT 314D CR EXCAVATOR PDP |
| 1808240 | WLN | CAT 314D CR EXCAVATOR WLN |
| 1808241 | BYJ | CAT 314D LCR EXCAVATOR BYJ |
| 1808242 | SBP | CAT 314D LCR EXCAVATOR SBP |
| 1808243 | SSZ | CAT 314D LCR EXCAVATOR SSZ |
| 1808244 | TXN | CAT 314D LCR EXCAVATOR TXN |
| 1808245 | XHR | CAT 314D LCR EXCAVATOR XHR |
| 1808246 | Caterpillar 315 series Excavators | |
| 1808247 | 3ZM | CAT 315 EXCAVATOR 3ZM |
| 1808248 | 4YM | CAT 315 EXCAVATOR 4YM |
| 1808249 | 6YM | CAT 315 L EXCAVATOR 6YM |
| 1808250 | 1SW | CAT 315B EXCAVATOR 1SW |
| 1808251 | 2DW | CAT 315B EXCAVATOR 2DW |
| 1808252 | 3AW | CAT 315B L EXCAVATOR 3AW |
| 1808253 | 5SW | CAT 315B L EXCAVATOR 5SW |
| 1808254 | 7RZ | CAT 315B L EXCAVATOR 7RZ |
| 1808255 | AKE | CAT 315C EXCAVATOR AKE |
| 1808256 | ANF | CAT 315C EXCAVATOR ANF |
| 1808257 | BTL | CAT 315C EXCAVATOR BTL |
| 1808258 | CFB | CAT 315C EXCAVATOR CFB |
| 1808259 | CFL | CAT 315C EXCAVATOR CFL |
| 1808260 | CFT | CAT 315C EXCAVATOR CFT |
| 1808261 | CJC | CAT 315C EXCAVATOR CJC |
| 1808262 | BYK | CAT 315D L EXCAVATOR BYK |
| 1808263 | BZN | CAT 315D L EXCAVATOR BZN |
| 1808264 | CJN | CAT 315D L EXCAVATOR CJN |
| 1808265 | DLG | CAT 315D L EXCAVATOR DLG |
| 1808266 | JGS | CAT 315D L EXCAVATOR JGS |
| 1808267 | JHA | CAT 315D L EXCAVATOR JHA |
| 1808268 | KBD | CAT 315D L EXCAVATOR KBD |
| 1808269 | NCM | CAT 315D L EXCAVATOR NCM |
| 1808270 | TLE | CAT 315D L EXCAVATOR TLE |
| 1808271 | Caterpillar 317 series Excavators | |
| 1808272 | 4MM | CAT 317 EXCAVATOR 4MM |
| 1808273 | 9SR | CAT 317 N EXCAVATOR 9SR |
| 1808274 | 9WW | CAT 317B L EXCAVATOR 9WW |
| 1808275 | 6DZ | CAT 317B LN EXCAVATOR 6DZ |
| 1808276 | Caterpillar 318 series Excavators | |
| 1808277 | 3LR | CAT 318B EXCAVATOR 3LR |
| 1808278 | ADC | CAT 318B EXCAVATOR ADC |
| 1808279 | 7KZ | CAT 318B N EXCAVATOR 7KZ |
| 1808280 | AEJ | CAT 318B N EXCAVATOR AEJ |
| 1808281 | BTG | CAT 318C EXCAVATOR BTG |
| 1808282 | CWP | CAT 318C EXCAVATOR CWP |
| 1808283 | DAH | CAT 318C EXCAVATOR DAH |
| 1808284 | FAA | CAT 318C EXCAVATOR FAA |
| 1808285 | GPA | CAT 318C EXCAVATOR GPA |
| 1808286 | MDY | CAT 318C EXCAVATOR MDY |
| 1808287 | Caterpillar 319 series Excavators | |
| 1808288 | KGL | CAT 319C EXCAVATOR KGL |
| 1808289 | BZH | CAT 319D EXCAVATOR BZH |
| 1808290 | DAY | CAT 319D EXCAVATOR DAY |
| 1808291 | EAW | CAT 319D L EXCAVATOR EAW |
| 1808292 | ZCA | CAT 319D L EXCAVATOR ZCA |
| 1808293 | ZGZ | CAT 319D L EXCAVATOR ZGZ |
| 1808294 | FMH | CAT 319D LN EXCAVATOR FMH |
| 1808295 | KFM | CAT 319D LN EXCAVATOR KFM |
| 1808296 | KTJ | CAT 319D LN EXCAVATOR KTJ |
| 1808297 | WBJ | CAT 319D LN EXCAVATOR WBJ |