They probably never tensioned the ropes correctly when installed. Sometimes you end up chasing that loose rope that never got stretched like the rest. I would tension the ropes with a torque wrench. Sheave to sheave with Cwt, measure each rope at all 4 points and add together. Get them right on but make that rope the tightest. Then set up the CANRTM with weights. You should have the component manual on it.
