| Pump Type | Configuration | Typical Pressure | Flow Range | Common CAT Applications |
|---|---|---|---|---|
| Main Variable Piston Pump | Tandem or single, swashplate design | 300–380 bar (4,350–5,500 psi) | 200–600 L/min | All medium to large excavators |
| Pilot Gear Pump | Fixed displacement gear pump | 30–50 bar (435–725 psi) | 20–80 L/min | Control circuit for pilot valves |
| Travel Pump | Integrated piston pump (often part of main pump) | 350–400 bar (5,075–5,800 psi) | Varies | Track drive systems |
| Swing Pump | Piston or gear pump | 300–350 bar (4,350–5,075 psi) | Varies | Swing motor supply |
