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 |
| 1808137 | CAT 231 series Excavators | |
| 1808138 | 1NK | Caterpillar 231D EXCAVATOR 1NK |
| 1808139 | 5WJ | Caterpillar 231D EXCAVATOR 5WJ |
| 1808140 | CAT 235 series Excavators | |
| 1808141 | 32K | Caterpillar 235 EXCAVATOR 32K |
| 1808142 | 62X | Caterpillar 235 EXCAVATOR 62X |
| 1808143 | 64R | Caterpillar 235 EXCAVATOR 64R |
| 1808144 | 81X | Caterpillar 235 EXCAVATOR 81X |
| 1808145 | 83X | Caterpillar 235 EXCAVATOR 83X |
| 1808146 | 1FD | Caterpillar 235B EXCAVATOR 1FD |
| 1808147 | 4ED | Caterpillar 235B EXCAVATOR 4ED |
| 1808148 | 7WC | Caterpillar 235B EXCAVATOR 7WC |
| 1808149 | 9PC | Caterpillar 235B EXCAVATOR 9PC |
| 1808150 | 2PG | Caterpillar 235C EXCAVATOR 2PG |
| 1808151 | 3WG | Caterpillar 235C EXCAVATOR 3WG |
| 1808152 | 5AF | Caterpillar 235C EXCAVATOR 5AF |
| 1808153 | 8KJ | Caterpillar 235D EXCAVATOR 8KJ |
| 1808154 | 8TJ | Caterpillar 235D EXCAVATOR 8TJ |
| 1808155 | CAT 245 series Excavators | |
| 1808156 | 82X | Caterpillar 245 EXCAVATOR 82X |
| 1808157 | 84X | Caterpillar 245 EXCAVATOR 84X |
| 1808158 | 94L | Caterpillar 245 EXCAVATOR 94L |
| 1808159 | 95V | Caterpillar 245 EXCAVATOR 95V |
| 1808160 | 1SJ | Caterpillar 245B EXCAVATOR 1SJ |
| 1808161 | 6MF | Caterpillar 245B EXCAVATOR 6MF |
| 1808162 | 4LK | Caterpillar 245D EXCAVATOR 4LK |
| 1808163 | 7ZJ | Caterpillar 245D EXCAVATOR 7ZJ |
| 1808164 | CAT 307 series Excavators | |
| 1808165 | 2PM | Caterpillar 307 EXCAVATOR 2PM |
| 1808166 | 2WM | Caterpillar 307 EXCAVATOR 2WM |
| 1808167 | CAT 311 series Excavators | |
| 1808168 | 2KM | Caterpillar 311 EXCAVATOR 2KM |
| 1808169 | 9LJ | Caterpillar 311 EXCAVATOR 9LJ |
| 1808170 | 2LS | Caterpillar 311B EXCAVATOR 2LS |
| 1808171 | 8GR | Caterpillar 311B EXCAVATOR 8GR |
| 1808172 | 9MR | Caterpillar 311B EXCAVATOR 9MR |
| 1808173 | CKE | Caterpillar 311C EXCAVATOR CKE |
| 1808174 | CLK | Caterpillar 311C EXCAVATOR CLK |
| 1808175 | PAD | Caterpillar 311C EXCAVATOR PAD |
| 1808176 | AKW | Caterpillar 311D LRR EXCAVATOR AKW |
| 1808177 | CLA | Caterpillar 311D LRR EXCAVATOR CLA |
| 1808178 | DDW | Caterpillar 311D LRR EXCAVATOR DDW |
| 1808179 | DWR | Caterpillar 311D LRR EXCAVATOR DWR |
| 1808180 | LKA | Caterpillar 311D LRR EXCAVATOR LKA |
| 1808181 | PNJ | Caterpillar 311D LRR EXCAVATOR PNJ |
| 1808182 | JFT | Caterpillar 311F LRR EXCAVATOR JFT |
| 1808183 | KCW | Caterpillar 311F LRR EXCAVATOR KCW |
| 1808184 | LZF | Caterpillar 311F LRR EXCAVATOR LZF |
| 1808185 | CAT 312 series Excavators | |
| 1808186 | 6BL | Caterpillar 312 EXCAVATOR 6BL |
| 1808187 | 6GK | Caterpillar 312 EXCAVATOR 6GK |
| 1808188 | 2NS | Caterpillar 312B EXCAVATOR 2NS |
| 1808189 | 3ES | Caterpillar 312B EXCAVATOR 3ES |
| 1808190 | 6SW | Caterpillar 312B EXCAVATOR 6SW |
| 1808191 | 9GR | Caterpillar 312B EXCAVATOR 9GR |
| 1808192 | 9HR | Caterpillar 312B EXCAVATOR 9HR |
| 1808193 | 9NW | Caterpillar 312B EXCAVATOR 9NW |
| 1808194 | 2KW | Caterpillar 312B L EXCAVATOR 2KW |
| 1808195 | 3FS | Caterpillar 312B L EXCAVATOR 3FS |
| 1808196 | 8JR | Caterpillar 312B L EXCAVATOR 8JR |
| 1808197 | 9FS | Caterpillar 312B L EXCAVATOR 9FS |
| 1808198 | BNN | Caterpillar 312C EXCAVATOR BNN |
| 1808199 | BWH | Caterpillar 312C EXCAVATOR BWH |
| 1808200 | CAE | Caterpillar 312C EXCAVATOR CAE |
| 1808201 | DBN | Caterpillar 312C EXCAVATOR DBN |
| 1808202 | FDS | Caterpillar 312C EXCAVATOR FDS |
| 1808203 | CBA | Caterpillar 312C L EXCAVATOR CBA |
| 1808204 | CBT | Caterpillar 312C L EXCAVATOR CBT |
| 1808205 | DLP | Caterpillar 312D EXCAVATOR DLP |
| 1808206 | FBJ | Caterpillar 312D EXCAVATOR FBJ |
| 1808207 | HCW | Caterpillar 312D EXCAVATOR HCW |
| 1808208 | HJX | Caterpillar 312D EXCAVATOR HJX |
| 1808209 | KCD | Caterpillar 312D EXCAVATOR KCD |
| 1808210 | LRK | Caterpillar 312D EXCAVATOR LRK |
| 1808211 | PHH | Caterpillar 312D EXCAVATOR PHH |
| 1808212 | RHL | Caterpillar 312D EXCAVATOR RHL |
| 1808213 | JBC | Caterpillar 312D L EXCAVATOR JBC |
| 1808214 | KES | Caterpillar 312D L EXCAVATOR KES |
| 1808215 | L44 | Caterpillar 312D L EXCAVATOR L44 |
| 1808216 | L5W | Caterpillar 312D L EXCAVATOR L5W |
| 1808217 | RKF | Caterpillar 312D L EXCAVATOR RKF |
| 1808218 | SKA | Caterpillar 312D L EXCAVATOR SKA |
| 1808219 | TGY | Caterpillar 312D L EXCAVATOR TGY |
| 1808220 | XGK | Caterpillar 312D L EXCAVATOR XGK |
| 1808221 | DGF | Caterpillar 312D2 EXCAVATOR DGF |
| 1808222 | GWN | Caterpillar 312D2 EXCAVATOR GWN |
| 1808223 | KLE | Caterpillar 312D2 EXCAVATOR KLE |
| 1808224 | TJY | Caterpillar 312D2 EXCAVATOR TJY |
| 1808225 | BRW | Caterpillar 312D2 GC EXCAVATOR BRW |
| 1808226 | F4F | Caterpillar 312D2 GC EXCAVATOR F4F |
| 1808227 | RXZ | Caterpillar 312D2 GC EXCAVATOR RXZ |
| 1808228 | EAB | Caterpillar 312D2 L EXCAVATOR EAB |
| 1808229 | FAB | Caterpillar 312D2 L EXCAVATOR FAB |
| 1808230 | HBF | Caterpillar 312D2 L EXCAVATOR HBF |
| 1808231 | MGJ | Caterpillar 312D2 L EXCAVATOR MGJ |
| 1808232 | MPP | Caterpillar 312D2 L EXCAVATOR MPP |
| 1808233 | WHJ | Caterpillar 312D2 L EXCAVATOR WHJ |
| 1808234 | GAC | Caterpillar 312E EXCAVATOR GAC |
| 1808235 | PZL | Caterpillar 312E EXCAVATOR PZL |
| 1808236 | MJD | Caterpillar 312E L EXCAVATOR MJD |
| 1808237 | WEY | Caterpillar 312E L EXCAVATOR WEY |
| 1808238 | NLG | Caterpillar 312F EXCAVATOR NLG |
| 1808239 | FKE | Caterpillar 312F GC EXCAVATOR FKE |
| 1808240 | CAT 313 series Excavators | |
| 1808241 | 9PR | Caterpillar 313B EXCAVATOR 9PR |
| 1808242 | AEX | Caterpillar 313B EXCAVATOR AEX |
| 1808243 | BAS | Caterpillar 313B EXCAVATOR BAS |
| 1808244 | HGF | Caterpillar 313C EXCAVATOR HGF |
| 1808245 | WSA | Caterpillar 313C SR EXCAVATOR WSA |
| 1808246 | KXD | Caterpillar 313D EXCAVATOR KXD |
| 1808247 | WPK | Caterpillar 313D EXCAVATOR WPK |
| 1808248 | LCE | Caterpillar 313D CR EXCAVATOR LCE |
| 1808249 | LBR | Caterpillar 313D SR EXCAVATOR LBR |
| 1808250 | FAP | Caterpillar 313D2 EXCAVATOR FAP |
| 1808251 | LCY | Caterpillar 313D2 EXCAVATOR LCY |
| 1808252 | PLD | Caterpillar 313D2 EXCAVATOR PLD |
| 1808253 | RDE | Caterpillar 313D2 EXCAVATOR RDE |
| 1808254 | ZAA | Caterpillar 313D2 EXCAVATOR ZAA |
| 1808255 | GAP | Caterpillar 313D2 GC EXCAVATOR GAP |
| 1808256 | GAJ | Caterpillar 313D2 LGP EXCAVATOR GAJ |
| 1808257 | RKN | Caterpillar 313D2 LGP EXCAVATOR RKN |
| 1808258 | DJE | Caterpillar 313F L EXCAVATOR DJE |
| 1808259 | PRG | Caterpillar 313F L EXCAVATOR PRG |
| 1808260 | GJD | Caterpillar 313F LGC EXCAVATOR GJD |
| 1808261 | HDK | Caterpillar 313F LGC EXCAVATOR HDK |
| 1808262 | CAT 314 series Excavators | |
| 1808263 | KHB | Caterpillar 314C EXCAVATOR KHB |
| 1808264 | KJA | Caterpillar 314C EXCAVATOR KJA |
| 1808265 | PCA | Caterpillar 314C EXCAVATOR PCA |
| 1808266 | SNY | Caterpillar 314C EXCAVATOR SNY |
| 1808267 | MFK | Caterpillar 314D CR EXCAVATOR MFK |
| 1808268 | PDP | Caterpillar 314D CR EXCAVATOR PDP |
| 1808269 | WLN | Caterpillar 314D CR EXCAVATOR WLN |
| 1808270 | BYJ | Caterpillar 314D LCR EXCAVATOR BYJ |
| 1808271 | SBP | Caterpillar 314D LCR EXCAVATOR SBP |
| 1808272 | SSZ | Caterpillar 314D LCR EXCAVATOR SSZ |
| 1808273 | TXN | Caterpillar 314D LCR EXCAVATOR TXN |
| 1808274 | XHR | Caterpillar 314D LCR EXCAVATOR XHR |
| 1808275 | CW8 | Caterpillar 314E CR EXCAVATOR CW8 |
| 1808276 | ECN | Caterpillar 314E CR EXCAVATOR ECN |
| 1808277 | GMD | Caterpillar 314E CR EXCAVATOR GMD |
| 1808278 | DKD | Caterpillar 314E LCR EXCAVATOR DKD |
| 1808279 | YCW | Caterpillar 314E LCR EXCAVATOR YCW |
| 1808280 | ZJT | Caterpillar 314E LCR EXCAVATOR ZJT |
| 1808281 | CAT 315 series Excavators | |
| 1808282 | 3ZM | Caterpillar 315 EXCAVATOR 3ZM |
| 1808283 | 4YM | Caterpillar 315 EXCAVATOR 4YM |
| 1808284 | 6YM | Caterpillar 315 L EXCAVATOR 6YM |
| 1808285 | 1SW | Caterpillar 315B EXCAVATOR 1SW |
| 1808286 | 2DW | Caterpillar 315B EXCAVATOR 2DW |
| 1808287 | 7RZ | Caterpillar 315B FM L EXCAVATOR 7RZ |
| 1808288 | 3AW | Caterpillar 315B L EXCAVATOR 3AW |
| 1808289 | 5SW | Caterpillar 315B L EXCAVATOR 5SW |
| 1808290 | 7RZ | Caterpillar 315B L EXCAVATOR 7RZ |
| 1808291 | AKE | Caterpillar 315C EXCAVATOR AKE |
| 1808292 | ANF | Caterpillar 315C EXCAVATOR ANF |
| 1808293 | BTL | Caterpillar 315C EXCAVATOR BTL |
| 1808294 | CFB | Caterpillar 315C EXCAVATOR CFB |
| 1808295 | CFL | Caterpillar 315C EXCAVATOR CFL |
| 1808296 | CFT | Caterpillar 315C EXCAVATOR CFT |
| 1808297 | CJC | Caterpillar 315C EXCAVATOR CJC |
| 1808298 | BYK | Caterpillar 315D L EXCAVATOR BYK |
| 1808299 | BZN | Caterpillar 315D L EXCAVATOR BZN |
| 1808300 | CJN | Caterpillar 315D L EXCAVATOR CJN |
| 1808301 | JGS | Caterpillar 315D L EXCAVATOR JGS |
| 1808302 | JHA | Caterpillar 315D L EXCAVATOR JHA |
| 1808303 | KBD | Caterpillar 315D L EXCAVATOR KBD |
| 1808304 | NCM | Caterpillar 315D L EXCAVATOR NCM |
| 1808305 | TLE | Caterpillar 315D L EXCAVATOR TLE |
| 1808306 | TDY | Caterpillar 315F LCR EXCAVATOR TDY |
| 1808307 | CAT 316 series Excavators | |
| 1808308 | DZW | Caterpillar 316E L EXCAVATOR DZW |
| 1808309 | WZY | Caterpillar 316E L EXCAVATOR WZY |
| 1808310 | YZZ | Caterpillar 316E L EXCAVATOR YZZ |
| 1808311 | F32 | Caterpillar 316E L OEM EXCAVATOR F32 |
| 1808312 | ECZ | Caterpillar 316F L EXCAVATOR ECZ |
| 1808313 | YDL | Caterpillar 316F L EXCAVATOR YDL |
| 1808314 | CAT 317 series Excavators | |
| 1808315 | 4MM | Caterpillar 317 EXCAVATOR 4MM |
| 1808316 | 9SR | Caterpillar 317 N EXCAVATOR 9SR |
| 1808317 | 9WW | Caterpillar 317B L EXCAVATOR 9WW |
| 1808318 | 6DZ | Caterpillar 317B LN EXCAVATOR 6DZ |
| 1808319 | CAT 318 series Excavators | |
| 1808320 | 3LR | Caterpillar 318B EXCAVATOR 3LR |
| 1808321 | ADC | Caterpillar 318B EXCAVATOR ADC |
| 1808322 | 7KZ | Caterpillar 318B N EXCAVATOR 7KZ |
| 1808323 | AEJ | Caterpillar 318B N EXCAVATOR AEJ |
| 1808324 | BTG | Caterpillar 318C EXCAVATOR BTG |
| 1808325 | CWP | Caterpillar 318C EXCAVATOR CWP |
| 1808326 | DAH | Caterpillar 318C EXCAVATOR DAH |
| 1808327 | FAA | Caterpillar 318C EXCAVATOR FAA |
| 1808328 | GPA | Caterpillar 318C EXCAVATOR GPA |
| 1808329 | MDY | Caterpillar 318C EXCAVATOR MDY |
| 1808330 | ZKJ | Caterpillar 318D L EXCAVATOR ZKJ |
| 1808331 | SGB | Caterpillar 318D2 EXCAVATOR SGB |
| 1808332 | DPJ | Caterpillar 318D2 L EXCAVATOR DPJ |
| 1808333 | HAH | Caterpillar 318D2 L EXCAVATOR HAH |
| 1808334 | HBP | Caterpillar 318D2 L EXCAVATOR HBP |
| 1808335 | JEB | Caterpillar 318D2 L EXCAVATOR JEB |
| 1808336 | TZS | Caterpillar 318D2 L EXCAVATOR TZS |
| 1808337 | WGR | Caterpillar 318D2 L EXCAVATOR WGR |
| 1808338 | XAH | Caterpillar 318D2 L EXCAVATOR XAH |
| 1808339 | XGS | Caterpillar 318D2 L EXCAVATOR XGS |
| 1808340 | ERR | Caterpillar 318E EXCAVATOR ERR |
| 1808341 | DZF | Caterpillar 318E L EXCAVATOR DZF |
| 1808342 | WZS | Caterpillar 318E L EXCAVATOR WZS |
| 1808343 | FFT | Caterpillar 318F L EXCAVATOR FFT |
| 1808344 | HCP | Caterpillar 318F L EXCAVATOR HCP |
| 1808345 | CAT 319 series Excavators | |
| 1808346 | KGL | Caterpillar 319C EXCAVATOR KGL |
| 1808347 | BZH | Caterpillar 319D EXCAVATOR BZH |
| 1808348 | DAY | Caterpillar 319D EXCAVATOR DAY |
| 1808349 | AYF | Caterpillar 319D L EXCAVATOR AYF |
| 1808350 | EAW | Caterpillar 319D L EXCAVATOR EAW |
| 1808351 | KRM | Caterpillar 319D L EXCAVATOR KRM |
| 1808352 | ZCA | Caterpillar 319D L EXCAVATOR ZCA |
| 1808353 | ZGZ | Caterpillar 319D L EXCAVATOR ZGZ |
| 1808354 | FMH | Caterpillar 319D LN EXCAVATOR FMH |
| 1808355 | KFM | Caterpillar 319D LN EXCAVATOR KFM |
| 1808356 | RJP | Caterpillar 319D LN EXCAVATOR RJP |
| 1808357 | WBJ | Caterpillar 319D LN EXCAVATOR WBJ |