Can your vehicle's cooling system pass the test?[ILLUSTRATIONS OMITTED] Using the ST255 radiator testing kit, NSN NSN National Stock Number NSN Nokia Siemens Networks NSN National Storytelling Network NSN NATO Stock Number NSN New Substances Notification (CEPA) NSN National Student Number (NZ) NSN Never Say Never 4910-00-728-8227, allows you to test the radiator cap Noun 1. radiator cap - cap on the opening in the top of a radiator through which a coolant liquid can be added cap - a top (as for a bottle) radiator - a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from and your vehicle's entire cooling system cooling system: see air conditioning; internal-combustion engine; refrigeration. cooling system Apparatus used to keep the temperature of a structure or device from exceeding limits imposed by needs of safety and efficiency. . The kit is listed in TM 750-254, Cooling Systems cooling systems for housed animals include spraying of roofs with water, evaporative pads with fans, foggers and misters; for pastured animals shelter from the sun by trees or artificial shade devices and cooling ponds are used. : Tactical Vehicles. The ST255 radiator testing kit includes a hand pump, a pressure gauge pressure gauge Instrument for measuring the condition of a fluid (liquid or gas) that is specified by the force the fluid would apply, when at rest, to a unit area, such as pounds per square inch (psi) or pascals (Pa). , and adapter fittings for attaching to the various types of caps. [ILLUSTRATION OMITTED] Radiator Cap Radiator caps should be tested periodically to make sure they work properly. A defective cap can cause loss of coolant coolant (kōō´l  nt),n , over-pressure damage or collapse of cooling system components. Here's how to test the radiator cap with this tester: Begin by looking at the radiator cap to make sure the gasket is not cracked or torn. Replace the cap if the gasket is damaged. [ILLUSTRATIONS OMITTED] Get an adapter from the testing kit that will fit your radiator cap. Attach the adapter to the pump's nozzle. Moisten the gasket on the cap with water or antifreeze antifreeze, substance added to a solvent to lower its freezing point. The solution formed is called an antifreeze mixture. Antifreeze is typically added to water in the cooling system of an internal-combustion engine so that it may be cooled below the freezing point , the way it would be under normal conditions. Attach the radiator cap to the adapter. Work the pump until the gauge shows the required pressure (psi). The psi is stamped on the radiator cap. If the cap is good, the needle on the gauge will hold at the required psi. If the needle doesn't hold, the cap is losing pressure. And it's time for a new cap. Cooling System Small problems in the cooling system--like low coolant level or cracked hoses--can quickly turn into big problems. Anything that'll interrupt the flow of coolant can make the engine overheat o·ver·heat v. o·ver·heat·ed, o·ver·heat·ing, o·ver·heats v.tr. 1. To heat too much. 2. To cause to become excited, agitated, or overstimulated. v.intr. . If that happens for even a little while, you're headed for trouble! [ILLUSTRATION OMITTED] 1. Make sure the engine's cool before testing. 2. Remove the radiator cap and attach the pump's nozzle to the neck of the radiator. [ILLUSTRATION OMITTED] 3. Work the pump until the gauge shows the required psi. [ILLUSTRATION OMITTED] 4. Keep an eye on the gauge. If the pressure's dropping, there's a leak in the cooling system. Listen for escaping air. And look for coolant leaks at these places: --hoses --hose connections --water pump --radiator --engine freeze plugs Also look for swollen or bulging personnel heater hoses. They probably need to be replaced. 5. After inspecting, gradually release the pressure on the pump so that coolant doesn't gush out. Remember, the system's under pressure. [ILLUSTRATION OMITTED] |
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