MIL-S-4953C(USAF)
3.12 Electric motor. The pump shall be driven by an electric motor conforming to CC-M-636. The motor shall be an explosion-proof, capacitor start, induction run motor and shall be designed to operate on 220V, 60-cycle, single-phase alternating current. The motor shall be protected for continuous-duty service. The motor shall be suitable for operation in a minimum ambient temperature of 122°F with a temperature rise not to exceed the safe operating temperature limits of the insulating material used as specified in Standard MG-1. The motor shall be of sufficient horsepower to drive the pump to obtain the volume and pressures specified herein as recommended by the motor manufacturer.
3.13 Filter. A filter shall be provided in the system capable of collecting impurities that may clog the pump or spray gun nozzle. The filter shall be provided with a 40 micron element. The filter shall be located in the spray outfit for ease of removal and replacement of the filter element.
3.14 Power plant. The alternator shall be driven by an air-cooled gasoline engine conforming to
MIL-E-11275.
3.14.1 Power. The normal rated power of the engine shall drive the engine cooling fan, pump, alternator, controls, and all other engine accessories. The engine shall be of sufficient horsepower to meet all requirements specified herein, as recommended by the engine manufacturer for continuous-duty operation.
3.14.2 Fuel tank. The fuel tank shall be incorporated as a part of the engine assembly and shall have a capacity sufficient to provide fuel for 4 hours minimum operation at rated load. The fuel tank and supporting frame shall be sufficiently rigid to insure freedom from vibration and assure that the tank will not be damaged during normal handling or use. A filler opening of 2 inches minimum diameter shall be provided. The opening shall be located in an accessible location on the outside of the cabinet. The cap shall be painted red. The filler opening shall be stenciled denoting the type of fuel to be used.
3.14.2.1 Fuel pump. If a fuel pump is used, it shall have sufficient capacity to supply the engine at its maximum rated load when lifting the fuel against a suction head of 4 feet.
3.14.3 Governor. The governor shall be capable of adjustment so that rated speed shall be maintained at normal rated load.
3.14.3.1 Variation in speed from no load to rated load and from rated load to no load shall not exceed ±10 percent of rated speed, except that during instantaneous load changes, the momentary speed variations shall not exceed ±10 percent of rated speed with the load variation not exceeding 75 percent of rated load.
3.14.3.2 Tachometer. An integral tachometer-hourmeter shall be provided on the engine instrument panel. The hourmeter shall record engine operating time only.
9
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business