A-A-52315
to allow the hoses to be mated and attached to the suction port.
Engine. The diesel engine shall be a heavy-duty commercial type with a recoil-type manual starter and a replaceable dry-type air filter. The engine shall be provided with a metal fuel tank which has a capacity of not less than one gallon. A fuel line shutoff valve attached directly to the tank shall be provided.
Speed-reduction system. Power from the engine may be transmitted to the pump, either through a gear train, a roller-chain drive or a flexible spline drive. All drive reductions shall be enclosed in an oil-tight case. The rotating motion may be changed to a reciprocating motion at the diaphragm by means of an eccentric crank, cam, or walking beam. The speed-reduction system shall drive the pump plunger and diaphragm at a normal operating rate of not less than 60 strokes per minute. Bearings used in the speed-reduction system shall be either ball or roller type.
Base frame and wheel mounting. The base frame and wheel mounting shall consist of a structural steel base or a base integral with a diaphragm-retainer casting, an axle, two wheels, a removable handlebar, and a support to hold the unit in a horizontal position when stationary. The frame shall be welded, per American Welding Society (AWS) structural welding code D1.1 or D1.2 for the applicable materials, into a rigid support for the engine, the pump and the speed-reduction system. The pump unit shall be mounted in a balanced position over the axle and shall be bolted to the base. The wheels shall be mounted on antifriction bearings and furnished with pneumatic tires, size 12.00 x 3 x 2 ply.
Safety. All exposed parts that are subject to high operating temperatures shall be insulated, fully enclosed, or guarded. All moving parts that are hazardous to operating or maintenance personnel shall be fully enclosed or guarded. Protective devices shall not impair the operating functions.
Wise limits. Noise levels of the pump units should not exceed 85 dB(A) at the operator’s position while pumps are operating under full load. Should noise level exceed 85 dB(A), the distance from the pump unit at which a limit of 85 dB(A) is met shall be shown on hazard signs mounted on all four sides of each production unit stating: “CAUTION, HEARING PROTECTION REQUIRED WITHIN ______ FEET WHEN PUMP UNIT IS OPERATING”.
Regulatory requirements. In accordance with Federal Acquisition Regulation, section 23.403, the Government’s policy is to acquire items composed of the highest percentage of recovered materials practicable, consistent with maintaining a satisfactory level of competition without adversely affecting performance requirements or exposing the supplier’s employees to undue hazards from the recovered materials.
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