ZF 4 BP 230 Pressure Oil Pump 4681.122.001: Diagnosis, Causes of Failure, and Sourcing Verified Units

ZF 4 BP 230 Pressure Oil Pump 4681.122.001: Diagnosis, Causes of Failure, and Sourcing Verified Units

Introduction: The Source of Hydraulic Pressure

The Pressure Oil Pump (Material-assembly-group-no: 4681.122.001) is the hydraulic heart of the ZF 4 BP 230 transmission. Its primary role is to supply pressurized oil to the clutch packs (at 16+2 bar) and the lubrication circuit. Pump failure instantly causes system pressure loss, leading to slippage and overheating.

This guide from Tianjin XiaoHang Construction Machinery Co., Ltd. focuses on diagnosing oil pump failure and procuring a reliable replacement unit.

Section 1: Recognizing Oil Pump Failure

Diagnosis for Pressure Loss

Failure of the Gear Pump 0750.109.325 often results in low or inconsistent pressure readings across all clutch test ports. Common causes include:

1. Contamination: Metal debris from internal wear damages the pump gears and housing.
2. Cavitation: Caused by low fluid levels or restricted suction filters.

Section 2: Procuring the Pressure Oil Pump

Ensuring Flow and Pressure Integrity

Replacement pumps (Assembly 4681.122.001) must guarantee the correct flow rate and pressure delivery. XiaoHang Machinery Co. supplies only verified pumps, emphasizing the quality of the internal GEAR PUMP 0750.109.325 and the surrounding O-rings (e.g., 182X3) to prevent leakage.

Section 3: Technical Support for Pump Replacement

The XiaoHang Assurance

Replacing the oil pump is a complex, high-stakes repair. Our 20 years of repair expertise ensures we provide the necessary technical support. Our fast lead times and strong inventory minimize machine downtime for this critical repair.

Conclusion: Restore Hydraulic Power with XiaoHang

For verified ZF 4 BP 230 Pressure Oil Pumps (Assembly 4681.122.001), trust the technical precision and reliable supply from Tianjin XiaoHang Construction Machinery Co., Ltd.