Maintenance Box Porous Pad compatible with models L3100, L3101, L3110, L3115, L3116, L3150, L3151, L3156, L3158, L3160, L3165, L5190.Replacement part number 1830528, 1749772.Designed to fit within the maintenance box assembly, this porous pad aids in fluid absorption and containment.proper function of the maintenance system during.Install according to guidelines for correct alignment and performance.