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.
Material Description:
YY242-2K oil pressure gauge
