Caterpillar 320D, 321D, 323D, 324D, 325D & 330D Hydraulic System Schematic PDF
This OEM Caterpillar hydraulic schematic provides technicians with detailed hydraulic circuit information for diagnosing and understanding the hydraulic systems used on multiple D-Series excavators.
The factory schematic includes complete color-coded hydraulic circuit layouts, hydraulic symbol references, pressure tap locations, quick coupler circuits, and main control valve information.
Models Covered
- Caterpillar 320D
- Caterpillar 321D
- Caterpillar 323D
- Caterpillar 324D
- Caterpillar 325D
- Caterpillar 330D
Manual Details
| Included Items | Complete Hydraulic System Schematic for Caterpillar 320D, 321D, 323D, 324D, 325D & 330D Excavators |
| File Format | PDF – Instant Download |
| Language | English |
| Pages | 2 Pages |
| File Size | 4 MB |
| Models Covered | 320D, 321D, 323D, 324D, 325D & 330D Excavators |
| Document Type | OEM Hydraulic System Schematic |
| Printable | Yes |
| Searchable | Yes |
| Delivery Method | Instant PDF Download |
| Manufacturer | Caterpillar Inc. |
Hydraulic Schematic Coverage Includes:
- Main Hydraulic Pump Circuits
- Main Control Valve Layout
- Quick Coupler Hydraulic Circuit
- Hydraulic Symbols Reference Table
- Electrical Symbols Table
- Main Pump and Filter Circuits
- Pressure Tap Locations
- Sensor Locations
- Sampling Port Identification
- Swing Motor Circuits
- Travel Motor Circuits
- Boom Cylinder Circuits
- Stick Cylinder Circuits
- Bucket Cylinder Circuits
- Heavy Lift Control Circuit
- Pilot Hydraulic System
- Hydraulic Oil Tank Layout
- Machine Component Locations
The attached OEM schematic also includes detailed pressure tap references and quick coupler component locations for efficient troubleshooting and hydraulic testing.
This hydraulic diagram is ideal for technicians, diagnostic specialists, and equipment owners requiring accurate factory hydraulic information.
Steven Elli –
The color-coded hydraulic circuits made troubleshooting much easier. Highly recommended
Mustafa Koc –
Clear diagrams, instant download
Electric Reach –
Exactly what our technicians needed for hydraulic diagnostics
James Allmaras –
Highly recommended for D9T owners