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Tom from SWISCO responded:
October 22, 2021
Hello! You'll know when spiral balances are ready for replacement when they no longer support the weight of the sash. Even then, you still may be able to give them a few years of life by charging them a couple times using a tool like our 75-006, but if that doesn't make a difference then you know it's time to get new ones. Basically, the crux of when to replace a spiral balance is when its spring has lost its tension. It takes a little bit of trial and error to determine that, but it should be self-evident. As for lubrication, I always recommend using a silicone spray in the track. Just make sure to clean it first. I like silicone better than oil because it's less prone to collecting dirt and stuff from outside. |
