CAT SIS (Service Information System) 2021 is the latest fully functional offline version of the Caterpillar database. All subsequent versions (CAT SIS Web) are web-only.

MAIN SOFTWARE SECTIONS:
- Spare parts catalogs.
- Repair and operation manuals.
- Component disassembly and assembly instructions.
- Electrical and hydraulic diagrams.
- Maintenance schedules.
- Specifications and technical data.

SUPPORTED EQUIPMENT (1977-2021):
- Construction and quarry equipment.
- Road construction equipment.
- Industrial, marine, and automotive engines.
- Electric generator sets.

PC SYSTEM REQUIREMENTS:
- OS: Windows 10 or Windows 11 (64-bit).
- RAM: 8 GB or more (16 GB recommended for 3D graphics).
- Storage: SSD only (the database will run very slowly on an HDD).
- Disk space: 300-350 GB of free space at the time of installation.



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