1R7851 COUNTER WEIGHT Caterpillar parts
E120
Rating:
Alternative (cross code) number:
CA1R7851
1R-7851
1R7851
CA1R7851
1R-7851
1R7851
Weight: 0.20 pounds 0 kg.
EXCAVATOR,
Compatible equipment models: 1R7851:
Number on catalog scheme:
2
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Information:
Probable Causes
Electrical connectors
Communication adapter and/or cables
Electrical power supply to the service tool connector
Electronic service tool
Electrical power supply to the ECM
Personality module
CAT Data LinkRecommended Actions
Electrical Connectors
Check for correct installation of ECM connectors J1/P1 and J2/P2 and the service tool connector. Refer to Troubleshooting, "Electrical Connectors - Inspect".Communication Adapter and/or Cables
Disconnect the communication adapter and the cables from the service tool connector. Reconnect the communication adapter to the service tool connector.
Verify that the correct cable is being used between the communication adapter and the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".Electrical Power Supply to the Service Tool Connector
Verify that battery voltage is present between terminals A and B of the service tool connector. If the communication adapter is not receiving power, the display on the communication adapter will be blank.Electronic Service Tool
In order to eliminate the electronic service tool as the problem, connect the electronic service tool to a different engine. If the electronic service tool experiences the same problem on a different engine, check the electronic service tool and related equipment in order to determine the cause of the problem.Electrical Power Supply to the ECM
Check power to the ECM. Refer to Troubleshooting, "Electrical Power Supply Circuit - Test".Note: If the ECM is not receiving battery voltage, the ECM will not communicate.Personality Module
Ensure that the correct personality module is properly installed in the ECM.Note: The personality module that is provided in a new ECM is blank. The engine will not start and the engine will not communicate with the electronic service tool until the personality module has been flashed. Refer to Troubleshooting, "Flash Programming".CAT Data Link
Troubleshoot the CAT Data Link for possible problems. Refer to Troubleshooting, "CAT Data Link Circuit - Test".
Electrical connectors
Communication adapter and/or cables
Electrical power supply to the service tool connector
Electronic service tool
Electrical power supply to the ECM
Personality module
CAT Data LinkRecommended Actions
Electrical Connectors
Check for correct installation of ECM connectors J1/P1 and J2/P2 and the service tool connector. Refer to Troubleshooting, "Electrical Connectors - Inspect".Communication Adapter and/or Cables
Disconnect the communication adapter and the cables from the service tool connector. Reconnect the communication adapter to the service tool connector.
Verify that the correct cable is being used between the communication adapter and the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".Electrical Power Supply to the Service Tool Connector
Verify that battery voltage is present between terminals A and B of the service tool connector. If the communication adapter is not receiving power, the display on the communication adapter will be blank.Electronic Service Tool
In order to eliminate the electronic service tool as the problem, connect the electronic service tool to a different engine. If the electronic service tool experiences the same problem on a different engine, check the electronic service tool and related equipment in order to determine the cause of the problem.Electrical Power Supply to the ECM
Check power to the ECM. Refer to Troubleshooting, "Electrical Power Supply Circuit - Test".Note: If the ECM is not receiving battery voltage, the ECM will not communicate.Personality Module
Ensure that the correct personality module is properly installed in the ECM.Note: The personality module that is provided in a new ECM is blank. The engine will not start and the engine will not communicate with the electronic service tool until the personality module has been flashed. Refer to Troubleshooting, "Flash Programming".CAT Data Link
Troubleshoot the CAT Data Link for possible problems. Refer to Troubleshooting, "CAT Data Link Circuit - Test".
Caterpillar parts catalog:
Parts counter Caterpillar catalog:
0990735
COUNTER WEIGHT
E300, E300B
E300, E300B
G27222200
COUNTER WEIGHT
Caterpillar
Caterpillar