3-46, Heavy loads will frequently be imposed on antifriction bearings in machines that are in storage. In certain instances excessively heavy loads of the ball or roller bearing on the races may occur when proper controls are not maintained. This condition involves assemblies, and fixtures that place much of their weight on these bearings, particularly when they are in an overhanging or improperly adjusted position, Improperly positioned assemblies and fixtures that impose such loads should be adjusted to proper position on the machine or should be removed from the machine and stored assembled to the skid, or skidded, or boxed separately, as specified in 4-04 or 4-07, whichever is the more practicable. This consideration shall be further extended to undue loads imposed in storage on such parts and assemblies as traversing bars, shafts, ways, spindle assemblies, etc. that might became misalined or warped in the absence of proper distribution of load or blocking or bracing. It is not practicable to set hard and fast rules and procedures, and the methods and degree of treatment employed shall be determined by the responsible personnel, 3-47. Motors and generators processed at the place of storage shall be reinstalled on the machine. Motors and generators that are not mounted on machines but are associated with the powering of specific machines shall be stored on suitable dunnage or skidded, and adequately identi- fied, including the serial number, with the parent machine or machines. 3-48. Where storage conditions are such that ambient air is not heavily dust laden, free breathing of hydraulic systems and gear boxes may be accomplished by shimming gear bax covers, and by the emd plates and covers on hydraulic systems. 18-36