TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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TRANSDUCER KIT TM 9-2320-280-20-1 1. General. The transducer kit contains a pulse tachometer transducer, a pressure and a vacuum transducer and the necessary adapters (bushing, plugs, tees, etc.). Also included in the kit is a current probe for measuring current and a test probe cable for measuring voltage and resistance. Not all fittings have part number markings. The legend will help to identify the items. Before installing any transducer kit item on the vehicle, be sure to clean the mounting surfaces. This is particularly important if you are going to open fuel lines or tap into manifolds. Dirt particles entering the engine can cause damage to both the engine and the transducer kit item. The transducers should kept clean, free of dirt and grease, and handled with reasonable care. 2. Pressure Transducer. The pressure transducers have a small breather hole on the side of the housing which should be kept unplugged. Do not use high pressure. 3. Pulse Tachometer. Make sure that the slotted hole in the engine tachometer drive shaft is clear and not hard packed before installing the pulse tachometer. 4. Threaded Adapters. Observe threaded fittings carefully to avoid engaging straight threads with pipe threads. Each measurement device (transducer) in the transducer kit has its own identification resistor. The VTM uses this identification resistor to check that the correct transducer is connected for the measurement being made. If the correct transducer is not connected, error code E002 will be displayed. 2-760