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COVER AS 3727586 - Caterpillar



3727586 COVER AS Caterpillar parts COVER
Rating:
51
Alternative (cross code) number:
CA3727586
372-7586
3727586
Caterpillar 3727586 COVER AS

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Accidental engine starting can cause injury or death to personnel working on the equipment.To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system.Turn the battery disconnect switch to the OFF position and lockout the battery disconnect switch with a safety lock.Place a Special Instruction, SEHS7332, "Do Not Operate" tag at the start switch and battery disconnect location to inform personnel that the machine is being worked on.
An open is a failure of an electrical circuit that results in no flow of electrical current. An open circuit is usually caused by failed electrical wires or a poor connection of electrical connectors. If an electrical wire or a connection is broken, the flow of electrical current through the circuit is interrupted. A normally closed circuit will have less than 5 ohms of resistance. The following procedure explains the test for an open circuit:ReferenceFor a complete electrical schematic, refer to Electrical System Schematic for the machine that is being serviced.TEST FOR AN OPEN CIRCUIT.
Identify the connectors and the wire numbers of the suspect circuits. Use the Electrical System Schematic of the machine to identify the circuits.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the component and the ECM from the wiring harness.
At one of the disconnected harness connections, place a jumper wire from the contact of the suspect wire to frame ground.
At the other connector of the machine harness, use the multimeter probes to measure the resistance from the contact of the suspect wire to frame ground.Expected Result: The resistance is less than 5 ohms.OK - The resistance is less than 5 ohms. The harness circuit is correct.Stop. NOT OK - The resistance is greater than 5000 ohms. There is an open in the machine harness.Repair: Repair the machine harness or replace the machine harness.Stop.


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