SENSOR-PROXIMITY 3304261 - Caterpillar

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Cross section of the Altronic solid state magneto (3) Alternator. (4) Vent. (5) Speed reduction gears. (6) Pickup coil. (7) Drive tang. (8) Storage capacitor. (9) Rotating timer arm. (10) SCR solid state switch. (11) Output connector.
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(12) Sensor. (13) Air Gap.The Caterpillar digital ignition system is designed to operate from a power source that has a voltage of 12 VDC. This system can also operate from a power source that has a voltage of 24 VDC. The controller steps up the voltage. This voltage charges a capacitor in order to store energy. The controller contains a logic microprocessor. The controller contains a relay switch for the storage capacitor. This relay switch will release energy that is stored. This stored energy will be released to the ignition coils. There is a switch that is located on the exterior of the controller. This switch is set for the engine that is being operated. The timing is adjusted for the fuel that is being consumed by the engine. The Magnetic Timing Disc is mounted on a gear that is directly driven by the camshaft gear. This gear is rotating at half of the engine speed. As a magnet passes by the timing sensor, a signal is sent to the controller. This signal tells the controller to fire the storage capacitor. The storage capacitor will energize that coil. The number of magnets in the magnetic disc is equal to the number of cylinders in the engine plus one. The extra magnet follows behind the magnet that was the last magnet to fire. This action is a signal to the CDIS controller. This signal indicates that the next revolution will begin.Spark Plug Adapter
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(1) Adapter. (2) Seal. (3) Cylinder head. (4) Gasket.The spark plug adapter (1) is mounted in the cylinder head (3). Seal (2) stops any type of leakage between the adapter and the cylinder head. The adapter extends upward through a hole in the valve cover.The gasket (4) stops water from entering the combustion chamber. This gasket also prevents combustion gas from entering the jacket water.Spark Plug And Transformer
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Altronic spark plug and transformer (1) Transformer. (2) Wire assembly. (3) Rubber boot. (4) Seal. (5) Spark plug.When the Altronic magneto is used, the transformer (1) is mounted on the valve cover. The wire assembly (2) is the lead for high tension. This will ignite the spark plug (5). The rubber boot (3) is part of the wire assembly (2). The boot forms a cover over the adapter and the valve cover. This cover will prevent dirt, water and other foreign materials from entering the adapter. The seal (4) will not allow the vapors from the crankcase to exit the adapter. This seal will also prevent oil from entering the adapter.Note: The wire assembly (2) and the seal (4) must be installed on all of the cylinders when the engine is running. If these seals are not installed, a spark from the exposed wire assembly may ignite the vapors from