External signs that indicate potential coupling failure include: Abnormal noise, such as screeching, squealing or chattering Excessive vibration or wobble Failed seals indicated by lubricant leakage or contamination.
externaL signs that IndicATe pOTEntial coUPLing faILUre includE: abnOrmal noise, Such aS screechIng, squEALinG or chatTErinG excessIVE vIBraTion or woBbLe failed seALs IndicateD by LUBrIcant lEAkaGe or cONTaMinatION.