MIL-S-4953C(USAF)
4.5.3 Defects in spray outfits already accepted. The investigation of a test failure could indicate that defects may exist in spray outfits already accepted. If so, the contractor shall fully advise the procuring activity of all defects likely to be found and methods of correcting them.
4.6 Test methods.
4.6.1 Examination of product. The spray outfit shall be inspected to determine compliance with the requirements specified herein with respect to materials, workmanship, dimensions, and marking.
4.6.2 Dielectric strength. The motor alternator and the electrical system shall be subjected to a dielectric strength test at a potential of 1,450 volts for one minute. Any current leak shall be cause for rejection.
4.6.3 General operation. The spray outfit shall be checked during operation for general performance of safety features. All valves, pump, heating system, and other controls shall be checked to assure proper operation of the spray outfit. This checking shall be performed during the test specified in 4.6.4.1 and 4.6.4.3.
4.6.4 Performance demonstration. The following tests shall be conducted in the order given.
4.6.4.1 The spray outfit shall be operated for 30 minutes pumping the preoiling fluid at a rate of
180 gph at a pressure of 80 psi heated to a maximum temperature of 100°F ±10°F with the electric heaters. After this test, the unit shall be filled with the preservative compound and the compound heated from 30°F to 235°F ±15°F in 30 minutes or less. The preservative compound shall then be pumped for 30 minutes at a rate of 10 gph at a pressure of 150 psi. The timer or spray gun shall not be used in this test.
4.6.4.2 The spray outfit shall be operated for 30 minutes delivering the heated corrosion- preventive compound through the spray nozzle at a rate of 1 pint per minute at 150 psi. The timer shall not be used in this test.
4.6.4.3 The spray outfit shall be operated at 150 psi delivering the heated corrosion-preventive compound through the nozzle with the timer on the gun in operation. The trigger shall be depressed 30 times. The quantity of compound delivered at each depression of the trigger at the spray gun shall be 50 ±2 cc. The quantity delivered shall be the average of six measurements taken during the test.
4.6.4.4 The spray outfit shall be operated at 150 psi delivering the heated corrosion-preventive compound through the nozzle with the timer on the gun set for delivery of 1 pint at each depression. This operation shall be repeated 30 times. The quantity delivered shall be the average of six measurements taken during this operation.
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