Lamborghini Retaining washer 403629

This Lamborghini retaining washer (SKU 403629) is made in Italy for burner assemblies. It acts as a thrust/support washer, providing fixation, centering, and load distribution for parts such as nozzles, electrodes, and diffusers. It fits the Lamborghini ECO, EM, and PG series burners. An additional ordering reference is 111888.

Such retaining washers secure components axially on a shaft (commonly a fan impeller, coupling, or cam) and typically fit into a groove or lock via a tab into a slot; a screwdriver or pliers removes them. The critical selection parameters are shaft diameter and groove width, which must match exactly to prevent play or loose fit. Material and thickness need to suit the environment: stainless steel for high temperatures or corrosion, carbon steel for general use. Verify the original part number or measure the shaft and groove before ordering.

When a retaining washer of this type wears, deforms, or is lost, play appears in the assembly and the geometry becomes disrupted. The burner may run unsteadily with poor combustion, causing accelerated wear of nearby parts and frequent breakdowns. Replacing the washer promptly restores proper assembly and extends the equipment's service life. To diagnose, check for play around the shaft and groove.