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Information Bulletin: Otis CT driving-machine outboard sheave shaft bearing lubrication
Information Bulletin
Information Bulletin: Otis CT driving-machine outboard sheave shaft bearing lubrication
May 6, 2010
Reference Number:
B-L4 090507 1
This Information Bulletin is to notify elevating devices contractors about potential failure of the outboard sheave shaft bearing on this type of machine due to a lack of lubrication of this bearing. This failure may affect and cause, in turn, failure of other driving-machine components, e.g., the worm or gear, rendering the elevator operation unsafe.
Recently, two units with this type of machine suffered outboard sheave shaft bearing failures due to a lack of lubrication. It is possible for the sheave to be disconnected from the mechanical power source when this bearing fails.
CT driving-machine outboard sheave shaft bearng caps have a plug installed in them. The plug is to be removed and a grease nipple installed. The bearing should be lubricated with Shell Alvania EP2 grease or equivalent. Care should be taken not to over-grease.
Janice Lee, P. Eng.
Provincial Elevating Devices Safety Manager
References:
Bill 19 – 2003 Safety Standards Act
B.C. Reg. 105/2004 Safety Standards General Regulation
B.C. Reg. 101/2004 Elevating Devices Safety Regulation
B.C. Reg. 137/2004 Safety Standards Act Repeal and Transitional Provisions Regulations