0102 085 MAN Compatible Oil Pump Overflow Valve

What does an oil pump overflow valve do?

This oil pump overflow valve serves as a critical safety component within the lubrication circuit of heavy commercial vehicle engines. It works by regulating the pressure generated by the oil pump, ensuring it remains within safe operational limits to protect the oil filter, cooler, and seals from excessive force. By redirecting excess oil back to the suction side when pressure thresholds are exceeded, it maintains system stability during varying engine speeds.

Vehicle compatibility and specifications

This specific component is compatible with MAN engines. It is engineered to meet the rigorous demands of heavy-duty service, ensuring reliable pressure control. The valve features an M13x1.75 thread specification to ensure a precise fit within the engine's lubrication assembly.

Installation and maintenance guidance

During routine maintenance, technicians should inspect the valve seat and internal surfaces for any signs of contamination or scoring. It is vital to verify that the spring is correctly oriented during installation and that all sealing surfaces remain clean to prevent persistent leaks or pressure loss. Always check the oil pressure at both idle and high engine speeds after installation to confirm correct operation.

Troubleshooting and system care

Maintaining correct oil viscosity is essential, as improper viscosity can negatively affect the opening behavior of this valve and disrupt overall system pressure.

OE cross-reference

0102 085 (Oil Pump Overflow Valve Oil Pumps) is the equivalent of the MAN OE numbers. This part directly replaces MAN OE numbers 51054055016, 51054055019, 51054055024, 51054060032, 51054060034.