Hydraulic Gear Pump - AM12

Hydraulic Gear Pump – AM12

Genuine replacement hydraulic gear pump for the AM12 1.2T mini excavator (KOOP KD192FE engine). Powers all hydraulic functions: boom, arm, bucket, and travel drive systems.

Specifications

• Type: External gear pump (tandem or dual-section)
• Primary Displacement: 6–8 cc/rev
• Secondary Displacement: 3–4 cc/rev (pilot circuit)
• Max Operating Pressure: 16 MPa (160 bar)
• Flow Rating: 18–22 L/min at 2000 rpm, rated pressure
• Connection Ports: SAE flange (ISO 4401-05)
• Rotation: Clockwise (SAE standard)
• Relief Valve: Integrated or remote-mounted

Compatibility

Fits: AM12 1.2T mini excavator (KOOP KD192FE engine)

Hydraulic System: 16 MPa (160 bar) rated system

Engine Coupling: Direct SAE flange to engine crankshaft

Function

• Primary section delivers main circuit pressure for boom/arm/bucket
• Secondary section supplies low-pressure pilot circuit for control valves
• Dual-pump design ensures smooth proportional control across all functions

Installation Notes

• Flush all hydraulic lines and reservoir with clean ISO VG 46 before installation
• Prime pump with fresh hydraulic fluid before connecting engine
• Check engine-to-pump coupling alignment (critical for SAE flange connection)
• Install new shaft seal and gaskets
• Set relief valve pressure to 16 MPa (use calibrated gauge)
• Bleed air from pump housing after connection
• Run engine at half-speed for 2–3 minutes before full load

Maintenance

• Hydraulic fluid change: Every 500 operating hours
• Filter replacement: Every 250 hours
• Pressure check: Every 100 hours (should hold 16 MPa steady)
• Noise/vibration inspection: Monthly (grinding indicates wear)