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 |
| 1833000 | CATERPILLAR diesel DP forklift | |
| 1833001 | DP15 | Caterpillar DP15 forklift. |
| 1833002 | DP15K | Caterpillar DP15K forklift. |
| 1833003 | DP15N | Caterpillar DP15N forklift. |
| 1833004 | DP18 | Caterpillar DP18 forklift. |
| 1833005 | DP18K | Caterpillar DP18K forklift. |
| 1833006 | DP18N | Caterpillar DP18N forklift. |
| 1833007 | DP20 | Caterpillar DP20 forklift. |
| 1833008 | DP20CN | Caterpillar DP20CN forklift. |
| 1833009 | DP20K | Caterpillar DP20K forklift. |
| 1833010 | DP20N | Caterpillar DP20N forklift. |
| 1833011 | DP25 | Caterpillar DP25 forklift. |
| 1833012 | DP25K | Caterpillar DP25K forklift. |
| 1833013 | DP25N | Caterpillar DP25N forklift. |
| 1833014 | DP30 | Caterpillar DP30 forklift. |
| 1833015 | DP30K | Caterpillar DP30K forklift. |
| 1833016 | DP30N | Caterpillar DP30N forklift. |
| 1833017 | DP35 | Caterpillar DP35 forklift. |
| 1833018 | DP35K | Caterpillar DP35K forklift. |
| 1833019 | DP35N | Caterpillar DP35N forklift. |
| 1833020 | DP40 | Caterpillar DP40 forklift. |
| 1833021 | DP40K | Caterpillar DP40K forklift. |
| 1833022 | DP40KL | Caterpillar DP40KL forklift. |
| 1833023 | DPL40 | Caterpillar DPL40 forklift. |
| 1833024 | DP45 | Caterpillar DP45 forklift. |
| 1833025 | DP45K | Caterpillar DP45K forklift. |
| 1833026 | DP50 | Caterpillar DP50 forklift. |
| 1833027 | DP50K | Caterpillar DP50K forklift. |
| 1833028 | DP60 | Caterpillar DP60 forklift. |
| 1833029 | DP70 | Caterpillar DP70 forklift. |
| 1833030 | DP80 | Caterpillar DP80 forklift. |
| 1833031 | DP90 | Caterpillar DP90 forklift. |
| 1833032 | DP100 | Caterpillar DP100 forklift. |
| 1833033 | DP115 | Caterpillar DP115 forklift. |
| 1833034 | DP135 | Caterpillar DP135 forklift. |
| 1833035 | DP150 | Caterpillar DP150 forklift. |
| 1833036 | DP80N | Caterpillar DP80N forklift. |
| 1833037 | DP90N | Caterpillar DP90N forklift. |
| 1833038 | DP100N | Caterpillar DP100N forklift. |
| 1833039 | DP120N | Caterpillar DP120N forklift. |
| 1833040 | DP135N | Caterpillar DP135N forklift. |
| 1833041 | DP150N | Caterpillar DP150N forklift. |
| 1833042 | DP160N | Caterpillar DP160N forklift. |