307012-3641 9218033 Hydraulic Pump Compatible with Excavator ZX120 ZX135US ZX160LC-3 Z180LC-3 ZX200 ZX210H-3 ZX225US

307012-3641 / 9218033 Hydraulic Gear Pump for Hitachi ZX120 ZX200

This 307012-3641 / 3070123641 hydraulic gear pump is supplied for Hitachi excavator hydraulic system applications. It is also commonly referenced with part number 9218033. Current public product references list this pump for Hitachi excavator models including ZX120, ZX135US, ZX160LC-3, Z180LC-3, ZX200, ZX210H-3 and ZX225US.

Some supplier listings describe this part as a hydraulic gear pump or hydraulic transmission gear pump. Because pump configurations may vary by model, serial number and hydraulic system arrangement, fitment should be confirmed by the original pump number, mounting face, port layout, shaft and machine serial number before ordering.

Application and Fitment Reference

• Primary Part Number: 307012-3641 / 3070123641

• Reference Number: 9218033

• Product Type: Hydraulic Gear Pump / Hydraulic Transmission Gear Pump

• Machine Category: Hitachi Excavator

• Compatible Model References: ZX120, ZX135US, ZX160LC-3, Z180LC-3, ZX200, ZX210H-3, ZX225US

• Supply Type: Genuine, OEM, or replacement supply may be available depending on current stock.

Common Symptoms That May Require Pump Inspection

• Slow hydraulic response: hydraulic functions respond slowly or inconsistently.

• Weak hydraulic pressure: the machine cannot maintain stable hydraulic output under operation.

• Oil leakage: leakage appears around the pump body, ports, shaft seal or mounting area.

• Abnormal pump noise: whining, vibration or cavitation-like sound during operation.

• Oil contamination: dirty oil or metal particles may accelerate internal gear pump wear.

Fitment Check Before Ordering

Before ordering this Hitachi 307012-3641 hydraulic gear pump, please compare it with your original unit. Important confirmation points include the original part number, pump body shape, mounting flange, shaft type, port direction, hydraulic line connection and machine serial number.

For faster confirmation, please send clear photos of the old pump nameplate, mounting face, shaft, ports and machine model plate. This helps reduce wrong orders and confirms whether 307012-3641 / 9218033 is suitable for your Hitachi excavator.

Installation and Maintenance Notes

• Clean the pump mounting area and hydraulic line connections before removal.

• Inspect hydraulic oil and filters before installing the replacement pump.

• Protect all pump ports from dust, water and metal particles during installation.

• Check shaft, port and mounting alignment before tightening hydraulic lines.

• After installation, run the machine at low speed first and check for leakage, abnormal noise and pressure instability.

Ordering Information

Topvelsun supplies hydraulic gear pumps, pilot pumps, main pumps and pump assemblies for Hitachi, Komatsu, Caterpillar, Hyundai, Kobelco and other construction equipment. For this 307012-3641 / 9218033 pump, please provide your machine model, serial number, original pump number and photos before quotation.