WHEEL-IDLER 3093296 - Caterpillar

Table 1
Tools Needed     Quantity    
4C-4911     Battery Load Tester     1    
225-8266     Ammeter     1    
257-9140     Multimeter     1    
163-0096     Diagnostic and Calibration Tool     1    Most of the tests of the electrical system can be done on the engine. The wiring insulation must be in good condition. The wire and cable connections must be clean and tight. The battery must be fully charged. If the on-engine test shows a defect in a component, remove the component for more testing.The service manual Testing And Adjusting Electrical Components, REG00636 has complete specifications and procedures for the components of the starting circuit and the charging circuit.
Illustration 1 g00283565
4C-4911 Battery Load Tester The 4C-4911 Battery Load Tester is a portable unit in a metal case. The 4C-4911 Battery Load Tester can be used under field conditions and under high temperatures. The tester can be used to load test all 6, 8, and 12 Volt batteries. This tester has two heavy-duty load cables that can easily be fastened to the battery terminals. A load adjustment knob is located on the top of the tester. The load adjustment knob permits the current that is being drawn from the battery to be adjusted to a maximum of 1000 amperes. The tester is cooled by an internal fan that is automatically activated when a load is applied.The tester has a built-in LCD. The LCD is a digital voltmeter. The LCD is a digital meter that will also display the amperage. The digital voltmeter accurately measures the battery voltage at the battery. This measurement is taken through tracer wires that are buried inside the load cables. The digital meter, that displays the amperage, accurately displays the current that is being drawn from the battery which is being tested.Note: Refer to Operating Manual, SEHS9249 for more complete information for the use of the 4C-4911 Battery Load Tester.
Illustration 2 g01347890
225-8266 Ammeter The 225-8266 Ammeter is a completely portable, self-contained instrument that allows electrical current measurements to be made without breaking the circuit or without disturbing the insulation on the conductors. A digital display is located on the ammeter for reading current directly in a range from 1 to 1200 amperes. If an optional 6V-6014 Cable is connected between the ammeter and one of the digital multimeters, current readings of less than 1 amperes can be read directly from the display of the multimeter.A lever is used to open the jaws over the conductor up to a diameter of 19 mm (0.75 inch). The spring loaded jaws close around the conductor in order to measure the current. A trigger switch that can be locked on the ON or OFF position is used to turn on the ammeter. When the turn-on trigger is released, the last current is held on the display for five seconds. This allows accurate measurements to be taken in limited access areas. In these areas, the digital display is not visible to the operator.