This 173-1203 Pilot Gear Pump (Charge Pump) is high-quality  auxiliary hydraulic pump, specially matched with the SBS80 main piston pump for Caterpillar excavators. It provides stable pilot pressure for the control system to operate joystick, boom, arm and bucket.

Direct replacement for original part, no modification required, widely used for repair and rebuild of Cat 312C, 315B excavators.

✅ Fit Info：

Part Number: 173-1203 Compatible Models: Caterpillar 312C, 315B Excavator Matched Main Pump: SBS80 Hydraulic Main Pump

Key Features

1. Precision alloy gear set, stable oil flow, low noise, high wear resistance
2. High-quality oil seal assembly, excellent anti-leakage performance
3. Strict OEM dimension standard, same mounting holes, oil port and shaft size
4. Compact structure, easy installation and maintenance
5. Every unit is hydraulic pressure tested before packing