XCMG Loader Engine Oil Pressure Gauge – PN 803502459 / YY242-2K | OEM Dashboard Instrument for LW500F

The XCMG PN 803502459​ (model YY242-2K) is the engine oil pressure gauge​ on XCMG wheel loaders — publicly listed as a XCMG loader spare part, with one channel pointing to the LW500F​ engine instrument cluster (4-pin version), while others broadly label it as "XCMG loader parts". Note that the YY242-2K model is not XCMG-exclusive — the same "Oil Pressure Gauge | YY242-2K" appears in SINOMACH CHANGLIN parts catalogs for the 956X wheel loader​ and 719H motor grader, so never quote on the model letters alone — always confirm against the full PN 803502459 on the machine BOM. Its job is to display real-time oil pressure in the engine lubrication main gallery on the dashboard — the engine's "eyes" — triggering an alarm when pressure drops below the safe threshold so the operator can shut down immediately and avoid scoring or seizing. In general construction-machinery practice, an oil pressure gauge usually consists of an oil-pressure indicator on the dashboard​ and a pressure sensor mounted on the engine main oil gallery or the oil filter housing, connected by wiring into a closed loop. General references put normal engine main-gallery oil pressure in the 150–300 kPa (0.15–0.3 MPa)​ range, with idle pressure no lower than 98 kPa; dropping below that signals serious faults such as oil-pump failure or gallery blockage. Instruments on construction machinery typically face strong vibration plus dusty, wet conditions, so shock resistance, waterproofing and temperature tolerance deserve attention in selection and maintenance.