My 305CR excavator experienced a stall under a heavy load and is now failing to restart. While digging, it almost stalled a few times before ultimately shutting down during high-load excavation. Upon attempting to restart, it initially turned over but then acted like the battery was depleted. A small amount of grey smoke was noted emanating from the rear of the engine, near the hydraulic pump, after the stall. While investigating with an infrared thermometer, I found no areas of overheating on the engine or pump. I suspect the issue may be related to the hydraulic pump, as there was a intermittent whining noise at high RPM prior to the stall, which I was unable to pinpoint. Any assistance would be greatly appreciated as I delve into the service manual for further troubleshooting.
In the latest update, I successfully jumpstarted the excavator, but it is still unable to start despite cranking over quickly. Dark grey smoke is emitted when trying to start, indicating fuel is reaching the engine. Fluid levels appear normal with no signs of burnt or milky oil, or cross-contamination. It appears further investigation into the service manual is warranted to address the issue.
If you're experiencing smoke, your engine should start properly. It's important to verify the power supply to the glow plugs and assess their current draw to ensure optimal functionality.
If you notice dark grey smoke coming from your vehicle, it could indicate a problem with the air intake. This issue may cause the engine to stall after a few seconds of cranking, which could be a sign of a serious hydraulic problem. It's important to address this issue promptly to prevent further damage and find a solution that is easy and effective.
Is the fuel shut off fully open?
If you detach the hydraulic pump from the engine, you can determine whether the engine is the issue. This diagnostic step will help identify the source of the problem, whether it's related to the engine or hydraulic system.
Answer: Answer: The stall issue could be related to various factors, such as fuel system problems, hydraulic pump issues, electrical problems, or engine overheating. Further troubleshooting is required to identify the exact cause.
Answer: Answer: The presence of grey smoke could indicate a potential issue with the hydraulic system, such as a leak or malfunction. It is important to further investigate this area for any visible damage or abnormalities.
Answer: Answer: The whining noise could be a sign of a problem with the hydraulic pump or a related component. It is recommended to inspect the hydraulic system thoroughly and seek assistance from a professional if needed to determine the source of the noise.
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