Frank
Identify the lateral tension in the handrail. If the metal teeth catch on the rubber, do not engage the emergency stop. You need to shift your weight to the rear incline until the vibration plate flattens. Use the heavy lubricant only on the pivot points. If the sound starts high-pitched, the structural integrity is already compromised. I told the supervisor at the office the gears were stripping months ago, but he didn't listen. Don't rush the alignment.