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+--- Thread: Caterpillar 268B No-Start Issue After Fuel Pump and/or Filter Failure (/thread-6270.html)
Caterpillar 268B No-Start Issue After Fuel Pump and/or Filter Failure - MikePhua - 07-04-2025
After experiencing a fuel pump or fuel filter failure, the Caterpillar 268B skid steer may fail to start. Even though power is reaching the engine start relay, the machine still won't crank. Below are common troubleshooting steps and solutions to resolve this issue.
Problem Description
Following a fuel pump or filter failure, the Caterpillar 268B skid steer fails to start. Although power is being supplied to the engine start relay via the switch, the engine still won't turn over. Users have verified power at the relay by using a jumper wire, confirming that the power is present, yet the machine does not start.
Common Causes and Solutions
- Check the Fuel System
The first step is to check the fuel system for proper operation. A faulty fuel pump or clogged filter could prevent fuel from reaching the engine, causing a no-start condition. Ensure that the fuel pump is working correctly and that the fuel filter is not obstructed. If the fuel pump is damaged, it should be replaced, and the fuel filter should be cleaned or replaced as well.
- Inspect the Starter Relay and Wiring
Even though power reaches the starter relay, it is still possible that the relay or its connections are faulty. Inspect the relay for proper function and check the wiring for corrosion or damage. If issues are found, replacing the relay or repairing the wiring might be necessary.
- Battery and Connections Check
In some cases, insufficient battery voltage or electrical connection issues can cause the machine not to start. Verify that the battery voltage is within the normal range and that the battery connections are secure. If the battery voltage is low, try charging or replacing the battery and ensure the connections are clean and tight.
- Examine the Engine Starting System
If the fuel and electrical systems are functioning properly, the next step is to check the engine's starting system. A faulty starter motor or ignition system could also prevent the machine from starting. If issues are found, inspect the starter motor for proper operation and replace it if necessary.
- Reset and Restart the System
After addressing the issues mentioned above, try disconnecting the power for a few minutes and then restarting the system. In some cases, the system may remain in an error state due to a fault, and a reset can help clear any potential error codes or protective modes.
The Caterpillar 268B no-start issue after a fuel pump or filter failure could be related to the fuel system, starter relay, battery, or the starting motor. By systematically checking these components and addressing the faults, most users can restore normal operation. If troubleshooting does not resolve the issue, it is advisable to contact Panswork’s professional repair service for a thorough inspection and solution.