RING-RETAINING 1T1004 - Caterpillar

Note: If the symptom is intermittent and the symptom cannot be repeated, refer to Troubleshooting, "Power Is Intermittently Low or Power Cutout Is Intermittent". If the symptom is consistent and the symptom can be repeated, continue with this procedure.Probable Causes
Check for Diagnostic codes and event codes
Slow cranking speed
Battery condition
Keyswitch power to the Electronic Control Module (ECM) and the Fuel Control Valve
ECM supply voltage
Engine speed/timing signal
Low-pressure fuel system
High-pressure fuel system
Fuel quality
Starting aids
Gear train problemRecommended Actions
Table 1
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Codes and Event Codes
A. Connect Caterpillar Electronic Technician (ET) to the service tool connector. Check for active diagnostic codes and event codes.
1. Look for active diagnostic codes or active event codes that are related to the following items:
- Low-pressure fuel system
- High-pressure fuel system
- Engine speed/timing sensors
- Shutdown devices
2. Check for event codes that are logged repeatedly. Repeated codes may be evidence of an impending problem. Check for logged events that have a severity of level 3.
3. Use Cat ET to confirm the status of any shutdown devices that are installed on the application. If the application has any shutoff devices that are latched mechanically, ensure that the devices have been reset. Also, check the status of any aftermarket shutdown devices that may be installed on the application.
Codes
Result: No codes are active or logged.
Proceed to the next step.
Result: Codes are active or logged. One or more codes are related to the high-pressure fuel system, the low-pressure fuel system, the engine speed/timing circuit, and shutdown devices.
Repair: Use the appropriate circuit test to troubleshoot any active diagnostic codes.
Proceed to the next step.
Result: If engine starting is being prevented by one of these devices, refer to the OEM information for details.
If the problem is not resolved, proceed to the next step.
2. Check for Slow Cranking Speed
A. Check the air inlet system for restrictions and/or for leaks.
1. Use Cat ET to check the engine speed while you crank the engine. If the engine cranks too slowly, the engine will not start.
2. Check for the following problems:
- Low voltage for an electric starting system
- Low air pressure for an air start system
- Excess parasitic load
- Engagement of a single starting motor on a dual starting motor system
Speed
Result: The engine speed is greater than 100 rpm for a duration of four revolutions.
Proceed to the next step.
Result: The engine speed is not greater than 100 rpm for a duration of four revolutions.
Proceed to the next step.
Repair: Or replace all that is necessary.
If the problem is not resolved, proceed to the next step.
3. Check the Battery Condition
A. Check the charge on the engine batteries.
B. Load-test the batteries. Refer to Special Instruction, SEHS9249, "Use of 4C-4911 Battery Load Tester for 6 V, 8 V, and 12 V Lead Acid Batteries".
6 V, 8 V, and 12 V
Result: