Worth understanding: Caterpillar's "SBS" naming is a CAT-specific part designation rather than an independent pump family — the SBS120 fitted to the 320D and 320D2 is built on Bosch Rexroth's A8VO axial piston platform, adapted to Caterpillar's spec. This matters for sourcing: a pump correctly matched to Rexroth A8VO tolerance, in the SBS120 configuration, performs identically to a CAT-badged original.
CAT 320D Pump — Specification Reference
| Spec | Value |
|---|---|
| Pump Model | SBS120 (Rexroth A8VO platform) |
| Applicable Models | CAT 320D, 320D2 |
| Max Operating Pressure | 340 bar |
| Displacement | 120 cc/rev |
| Equipment Class | 20-tonne excavator |
| Related CAT Pump | SBS140 (used in 325C, 330D — larger class) |
Confirm your exact machine generation and pump nameplate before ordering — WhatsApp a photo for a precise match.
What Our Quality Process Covers
Measured against the original A8VO-platform tolerance specification.
Tested for accurate load-sensing response across boom, arm, and bucket functions.
Replaced as standard on every unit.
Verified at 340 bar rated pressure, output documented on the written test report.