OO-M-2888
3.24 Electromagnetic interference characteristics. When specified (see 6.2), the mixer shall conform to the electromagnetic interference requirements and test limits for equipment as specified in SAE J551.
3.25 Noise level. With the mixer in the normal skiploading, mixing, or discharging cycle, the noise level at the operators normal operating location shall not exceed 84 db(A) when measured in accordance with SAE J88.
3.26 Cleaning, treatment, and painting. Surfaces normally painted in the manufacturer's commercial practice shall be cleaned, treated, and painted as specified herein. Surfaces to be painted shall be cleaned and dried to ensure that they are free from contaminants such as oil, grease, welding slag and spatter, loose mill scale, water, dirt, corrosion products, or any other interfering substances. As soon as practicable, after cleaning and before any corrosion product or other interfering material can result, the surface shall be prepared or treated to ensure the
adhesion of the coating system. The painting shall consist of at least one coat of primer and one finish coat of acrylic-based enamel. The primer shall be applied to a clean, dry surface as soon as practicable after cleaning and treating. Painting shall be with manufacturer's current materials according to manufacturer's current processes for commercial mixers and the total dry film thickness shall be not less than 2.5 mils (.06 mm) over the entire surface. The paint shall be free from runs, sags, orange peel, or other defects. Color of finish coat, conforming to FED-STD-
595, shall be as specified (see 6.2). The end item, allied equipment, and attachments shall be the same color.
3.27 Instruction plates. The mixer shall be equipped with instruction plates suitably located, describing any special or important procedures to be followed in operating and servicing the equipment. Plates shall be of a material which will last and remain legible for the life of the equipment, and shall be securely affixed thereto with nonferrous screws or bolts of not less than
1/8-inch (3 mm) diameter.
3.28 Identification plate. When specified (see 6.2), an identification plate shall be furnished by the contracting officer for each mixer. The contractor shall stamp all necessary data in the blank spaces of the plate provided for that purpose, and securely affix to each mixer in a conspicuous place with nonferrous screws or bolts, not less than 1/8-inch (3 mm) diameter. The applicable nomenclature contained in the contract item description shall be placed in the top blank.
3.29 Workmanship
3.29.1 Steel fabrication. The steel used in fabrication shall be free from kinks, sharp bends, and other conditions which would be deleterious to the finished product. Manufacturing process shall not reduce the strength of the steel to the value less than intended by the design. Manufacturing processes shall be done neatly and accurately. All bends shall be made by controlled means to ensure uniformity of size and shape.
3.29.2 Bolted connections. Boltholes shall be accurately punched or drilled and shall have the burrs removed. Washers or lockwashers shall be provided in accordance with good commercial
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