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 |
| 1821000 | CAT Track-Type Skidders | |
| 1821001 | 8ZF | Caterpillar D4HTSK II TRACK SKIDDER 8ZF Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821002 | 7PK | Caterpillar D4HTSK III TRACK SKIDDER 7PK Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821003 | 7EG | Caterpillar D5HTSK II TRACK SKIDDER 7EG Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821004 | 5NH | Caterpillar 4P BULLDOZER 5NH Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821005 | 7BG | Caterpillar 54H WINCH 7BG Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821006 | CAT Track-Type Skidders 120 series | |
| 1821007 | 1WG | Caterpillar 120C GRAPPLE 1WG Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821008 | CAT Track-Type Skidders 125 series | |
| 1821009 | 3NG | Caterpillar 125C GRAPPLE 3NG Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821010 | CAT Track-Type Skidders 517 series | |
| 1821011 | 5WW | Caterpillar 517 TRACK SKIDDER 5WW Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821012 | 6PW | Caterpillar 517 TRACK SKIDDER 6PW Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821013 | CAT Track-Type Skidders 527 series | |
| 1821014 | 2RS | Caterpillar 527 TRACK SKIDDER 2RS Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821015 | 3DS | Caterpillar 527 TRACK SKIDDER 3DS Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821016 | 4NS | Caterpillar 527 TRACK SKIDDER 4NS Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821017 | BDW | Caterpillar 527 TRACK SKIDDER BDW Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821018 | JSR | Caterpillar 527 TRACK SKIDDER JSR Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821019 | PTR | Caterpillar 527 TRACK SKIDDER PTR Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821020 | TS5 | Caterpillar 527 TRACK SKIDDER TS5 Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |
| 1821021 | M3Z | Caterpillar 527 OEM TRACK SKIDDER M3Z Spare parts catalog, Service (workshop/repair) manuals, Operation and Maintenance manual, Special Instructions, Technical Information |