Maintenance of Stainless Steel Sliding Glass Door Tandem Roller 81-149

A quick learner from Honolulu, Hawaii says:
This hardware was built into a set of very heavy custom wood/glass sliding doors in 2005. Do these rollers require lubrication or other maintenance?

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Tom from SWISCO responded:
If you find that you need lubrication, see our 75-077 slider slicker track lubricant. You could also consider using a silicone spray.
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