BUSHING-SLEEVE 9U0974 - Caterpillar

Test Tools For The Electrical System
Table 1
Tools Needed     Quantity    
4C-4911 Battery Load Tester     1    
6V-7070 Digital Multimeter     1    
8T-0900 Ammeter     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.The 8T-0900 Ammeter is completely portable. This ammeter is a self-contained instrument that measures electrical currents without breaking the circuit and without disturbing the conductor's insulation.
Illustration 1 g00296441
8T-0900 Ammeter The ammeter contains a digital display that is used to monitor current directly within a range between 1 ampere and 1200 amperes. If an optional 6V-6014 Cable is connected between this ammeter and a digital multimeter, current readings can be viewed directly from the display of the multimeter. This can be accomplished under only one condition:
The readings are less than 1 ammeter.A lever opens the ammeter's jaws over a conductor. The conductor's diameter can not be larger than 19 mm (0.75 inch).The spring loaded jaws close around the conductor. A trigger switch controls the ammeter. The trigger switch can be locked into the ON position or into the OFF position.After the trigger has been turned to the OFF position, the reading will remain on the digital display for five seconds. This accurately measures currents in areas with limited access. For example, these areas include areas that are beyond the operator's sight. An ammeter for DC operation contains a zero control. This ammeter has batteries that supply the power for operation. The batteries are located in the handle of the ammeter.Note: Refer to Special Instruction, SEHS8420 for more information about using the 8T-0900 Ammeter.
Illustration 2 g00283566
6V-7070 Digital Multimeter The 6V-7070 Digital Multimeter is a portable, hand-held service tool with a digital display. This multimeter is built with extra protection against damage that may occur in field applications. The multimeter is equipped with 7 functions and 29 ranges. The 6V-7070 Digital Multimeter has an instant ohms indicator. This indicator permits checking continuity for a fast inspection of the circuits. The multimeter can also be used for troubleshooting capacitors with small values.Note: Refer to Special Instruction, SEHS7734.Battery
Never disconnect any charging unit circuit or battery circuit cable from the battery when the charging unit is operated. A spark can cause an explosion from the flammable vapor mixture of hydrogen and oxygen that is released from the electrolyte through the battery outlets. Injury to personnel can be the result.
The battery circuit is an electrical load on the charging unit. The load is variable because of the condition of the charge in the battery.
The charging unit will be damaged if the connections between the battery and the charging unit are