i recently bought GHL-Profilux Independant Dosing Pump with three pumps. The unit has been running approximatly one month. A few days ago one of the pumps started squeeking, this the not the actual motor but the white plastic part with the rollers inside. I distmantled the part and gave the rollers a wipe, two days later the squeek has returned, one of the other units is also started to squeek. The manual states to not lubricate in any form. Is this a common problem or is there a remedy to stop the annoying squeek?
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