PULLEY ASSEM. 5M7490 - Caterpillar

Table 1
Sales Model New Part Number Former Part Number(1)
797 Retrofit LRC Export 548-4814 505-8856
793F Tier 2 548-4809 505-8852
793F LRC 548-4808 505-8855
797F Tier 2 548-4803 505-8851
797F LRC 548-4802 505-8854
797F HAA LRC 548-4805 541-0069
797F Tier 2 Custom 548-4804 486-5853
(1) The former part number listed is for reference only and may differ.The 797F Tier II custom file is applicable only to the machines with serial numbers listed in Table 2.
Table 2
Prefix / Serial Number List
S/N:LAJ00227
S/N:LAJ00228
S/N:LAJ00311
S/N:LAJ00312
S/N:LAJ00313
S/N:LAJ00317
S/N:LAJ00322
S/N:LAJ00327 Note: For 793F and 797F applications, it is recommended to update the Advisor Software to 552-6122 Monitor Software Gp which has improved logic for -7 code check engine lights.Troubleshooting Procedure
Table 3
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Establish communication between Cat® Electronic Technician (ET) and the engine ECM. Cat ET must be configured for Dual Data Link Communications to perform this procedure. Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Determine the code that is associated to an injector. Codes
Result: A -2 code is present.
Repair: Perform the following procedure:
1. Do not clear the diagnostic code.
Access the Fuel System Verification Test by accessing the following display screens:
- Diagnostics
- Diagnostic Tests
- Fuel System Verification Test
3. Perform the Fuel System Verification Test.
Result: If the injector passes the test, the injector is "OK". Cat ET will clear the code.
Result: If the injector fails the test, perform the following procedure:
a. Replace the injector.
b. Flash program the trim file for the new injector into the ECM. Refer to Troubleshooting, "Injector Trim File - Install", if necessary.
c. Perform the Fuel System Verification Test again. This test will clear the active diagnostic code for the new injector. Verify that the original condition has been resolved.
Result: If the test is "Aborted", correct the condition creating the problem and rerun the test.
Result: A -7 code is present.
Repair: Perform the following procedure:
1. Do not clear the diagnostic code.
Access the Fuel System Verification Test by accessing the following display screens:
- Diagnostics
- Diagnostic Tests
- Fuel System Verification Test
3. Perform the Fuel System Verification Test.
If the injector passes the test, the injector is "OK". Cat ET will clear the code.
Result: If the injector fails the test, perform the following procedure:
a. Access the Logged Diagnostic Codes in Cat ET.
b. Observe the first logged occurrence of the -7 code on the affected cylinder.
c. Schedule the injector for replacement prior to exceeding 1500 service meter hours from the time of first occurrence on the affected cylinder. The injector does not require immediate replacement.
d. Replace the injector at the scheduled interval.
e. Flash program the trim file for the new injector into the ECM. Refer to Troubleshooting, "Injector Trim File - Install", if necessary.
f. Perform the Fuel System Verification Test again. This test will clear the active diagnostic code for the new injector. Verify that the original condition has been resolved.
Result: If the test is "Aborted", correct the condition creating the problem and rerun the test.