Assuming it is electric it may need lubrication. They usually have grease around the gears. I assume manual ones have some lubricant also. Might check with mfg if you do not have manual with your unit. Roy Lashway '78 Argosy,'56 Bubble WBCCI 1610 VAC rlashway@zianet.com web site: www.zianet.com/rlashway