MIL-S-62095C(AT)
* 3.16.2.1 Noise level. If the noise level at the operator's position, when measured in accordance with MIL-STD-1474, exceeds 84 decibels (dB(A)), a warning plate stating "CAUTION: HEARING PROTECTION REQUIRED" shall be permanently affixed to the semitrailer in a conspicuous location at the operator's position. The noise level shall be determined with the vehicle stationary and the pumping system operating at a maximum engine governed speed and maximum load. The plate shall conform to 3.1.1.8.
3.16.2.2 Exhaust system. The exhaust system shall be furnished with a spark arresting muffler. The muffler shall have a heat shield. The tailpipe shall be pointed toward the rear end and to the ground. The spark arrester shall have an 80 percent arresting efficiency when rated in accordance with SAE J350.
* 3.16.2.3 Lights. In addition to the other lighting specified herein, lights with guards and toggle switches suitable for illuminating the engine control panel shall be furnished.
* 3.16.2.4 Engine control panel. The engine throttle and a key-operated starting switch shall be installed in a weather- and waterproof cabinet on a control panel, each identified as to their function. The cabinet shall be fitted with a side hinged cover with a spring type latch and shall provide for locking with a padlock.
3.16.3 Water tank outlet valve and controls. A tank outlet valve of the flanged type not less than 75 mm (3 inches) in nominal diameter shall be provided. The outlet valve, when closed, shall effectively seal the tank and shall be of a type permitting complete removal of the valve body. Controls with slotted stops to hold the outlet valve at various openings shall be furnished and located in the manifold cabinet. The outlet valve shall have a screen of small mesh that will not unduly restrict the flow of water through the discharge piping. The screen shall be readily removable for cleaning and shall be located on the inside of the tank over the valve mechanism.
3.16.4 Manifold. A manifold shall be provided having 75 mm (3-inch) gate valves and with cam-locking connections designed to fit the hoses specified herein, arranged to provide the following:
(a) Gravity discharge of tank contents, bypassing the pump.
(b) Pressure discharge of tank contents by use of the pump unit.
(c) Filling of the tank through the filler opening, by utilizing the pump unit and the hoses specified herein, from a non-pressurized source.
* 3.16.5 Instruction plate. A data plate, showing a schematic of all valves, components and accessories with operating instructions, shall be fastened in a visible location inside the curbside cabinet door. The plate shall conform to 3.1.1.8.
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