7S8621 GEAR (59 Teeth) Caterpillar parts
561D, D5, D5B
Rating:
Alternative (cross code) number:
CA7S8621
7S-8621
7S8621
CA7S8621
7S-8621
7S8621
Weight: 3 pounds 1 kg.
PIPELAYER, TRACK-TYPE TRACTOR,
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2023-11-03
2023-10-20
2023-10-10
2023-10-10
2023-09-11
2020-08-06
2020-08-06
Number on catalog scheme:
20
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Information:
Use this procedure to troubleshoot a problem with the power to the engines Electronic Control Module (ECM). Also, use this procedure if one of the following diagnostic codes is active or easily repeated.
Table 1
J1939 Code and Description CDL Code and Description Comments
168-3
Battery Potential / Power Input #1 : Voltage Above Normal 168-3
Battery Potential / Power Input #1 : Voltage Above Normal The battery supply voltage is less than 18 VDC on 24 VDC systems for 0.5 seconds or the battery supply voltage is less than 9 VDC on 12 VDC systems for 0.5 second.
The engine Electronic Control Module (ECM) has been powered for 3 seconds.
The engine is running for at least 3 seconds.
168-4
Battery Potential / Power Input #1 : Voltage Below Normal 168-4
Battery Potential / Power Input #1 : Voltage Below Normal The 24 VDC voltage falls below 18 VDC for .5 seconds.
The 24 VDC voltage must return above 18.2 VDC for 3 seconds in order for the diagnostic to reset.
The engine is running for at least 3 seconds.
5758-11
Aftertreatment #1 Intake Gas Sensor Power Supply : Other Failure Mode 3781-11
Aftertreatment #1 Intake NOx Level Sensor Power Supply : Other Failure Mode The ECM detects voltage that is below the acceptable value.
5759-11
Aftertreatment #1 Outlet Gas Sensor Power Supply : Other Failure Mode 3619-11
Aftertreatment #1 Outlet #1 NOx Level Sensor Power Supply : Other Failure Mode The ECM detects voltage that is below the acceptable value.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A -3 code is active or logged.
Proceed to Test Step 2.
Result: A -4 code is active or logged.
Proceed to Test Step 3.
2. Check the Charging Circuit
Charging Circuit
Result: The charging system is OK.
Proceed to Test Step 3.
Result: The charging system is NOT OK.
Repair: There is a problem with the charging system. Refer to Special Instruction, REHS0354, "Charging System Troubleshooting" for additional information.
Verify that the repair eliminated the problem.
3. Inspect the Batteries
A. Charge the batteries, if necessary. Refer to Special Instruction, SEHS7633, "Battery Test Procedure" for additional information.
B. Load-test the batteries. Refer to Special Instruction, SEHS9249, "Use of 4C-4911 Battery Load Tester for 6, 8 V and 12 V Lead Acid Batteries" for additional information.
Batteries
Result: The batteries pass the load test. The measured voltage is between 11.5 VDC and 13.5 VDC for a 12 V system. The measured voltage is between 23.0 VDC and 27.0 VDC for a 24 V system.
Repair: Verify that the "System Operating Voltage Configuration" is correctly configured in the Engine ECM configuration parameters.
Verify that the repair eliminated the problem.
Result: The battery voltage is low or the battery did not pass the load test.
Repair: Repair or replace the batteries.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
Table 1
J1939 Code and Description CDL Code and Description Comments
168-3
Battery Potential / Power Input #1 : Voltage Above Normal 168-3
Battery Potential / Power Input #1 : Voltage Above Normal The battery supply voltage is less than 18 VDC on 24 VDC systems for 0.5 seconds or the battery supply voltage is less than 9 VDC on 12 VDC systems for 0.5 second.
The engine Electronic Control Module (ECM) has been powered for 3 seconds.
The engine is running for at least 3 seconds.
168-4
Battery Potential / Power Input #1 : Voltage Below Normal 168-4
Battery Potential / Power Input #1 : Voltage Below Normal The 24 VDC voltage falls below 18 VDC for .5 seconds.
The 24 VDC voltage must return above 18.2 VDC for 3 seconds in order for the diagnostic to reset.
The engine is running for at least 3 seconds.
5758-11
Aftertreatment #1 Intake Gas Sensor Power Supply : Other Failure Mode 3781-11
Aftertreatment #1 Intake NOx Level Sensor Power Supply : Other Failure Mode The ECM detects voltage that is below the acceptable value.
5759-11
Aftertreatment #1 Outlet Gas Sensor Power Supply : Other Failure Mode 3619-11
Aftertreatment #1 Outlet #1 NOx Level Sensor Power Supply : Other Failure Mode The ECM detects voltage that is below the acceptable value.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: A -3 code is active or logged.
Proceed to Test Step 2.
Result: A -4 code is active or logged.
Proceed to Test Step 3.
2. Check the Charging Circuit
Charging Circuit
Result: The charging system is OK.
Proceed to Test Step 3.
Result: The charging system is NOT OK.
Repair: There is a problem with the charging system. Refer to Special Instruction, REHS0354, "Charging System Troubleshooting" for additional information.
Verify that the repair eliminated the problem.
3. Inspect the Batteries
A. Charge the batteries, if necessary. Refer to Special Instruction, SEHS7633, "Battery Test Procedure" for additional information.
B. Load-test the batteries. Refer to Special Instruction, SEHS9249, "Use of 4C-4911 Battery Load Tester for 6, 8 V and 12 V Lead Acid Batteries" for additional information.
Batteries
Result: The batteries pass the load test. The measured voltage is between 11.5 VDC and 13.5 VDC for a 12 V system. The measured voltage is between 23.0 VDC and 27.0 VDC for a 24 V system.
Repair: Verify that the "System Operating Voltage Configuration" is correctly configured in the Engine ECM configuration parameters.
Verify that the repair eliminated the problem.
Result: The battery voltage is low or the battery did not pass the load test.
Repair: Repair or replace the batteries.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).
Caterpillar parts catalog:
Parts gear Caterpillar catalog:
D5, D5B, D5E
D5, D5B
D5, D5B
D5, D5B
D5, D5B
561D, D5, D5B
814, 950, 955K, 955L, 966C, D5, D5B
814, 950, 955K, 955L, 966C, D5, D5B
814, 950, 955K, 955L, 966C, D5, D5B
814, 950, 955K, 955L, 966C, D5, D5B
814, 950, 955K, 955L, 966C, D5, D5B
615, 615C, 950, 955L, 966C, D25C, D5B
D6C, D6D
D6C, D6D
D6C, D6D
D6C, D6D
D6C, D6D
D6C, D6D
8S3498
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941, 951B, D4D
941, 951B, D4D
3S4382
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955K, 955L
955K, 955L
955K, 955L
955K, 955L
1P2186
GEAR (8 Teeth)
55, D5B, D6D
55, D5B, D6D
1P6746
GEAR (8 Teeth)
55, D6D
55, D6D