+- Excavator Forum (https://www.panswork.com)
+-- Forum: Diesel Power Talking (https://www.panswork.com/forum-1.html)
+--- Forum: Operator Talking (https://www.panswork.com/forum-44.html)
+--- Thread: 2016 Bobcat T630 with Doosan Engine: Issues and Troubleshooting (/thread-6388.html)
2016 Bobcat T630 with Doosan Engine: Issues and Troubleshooting - MikePhua - 07-04-2025
In a discussion on Panswork, a user shared their experience with a 2016 Bobcat T630 loader that is equipped with a Doosan engine. The user reported issues with the machine’s performance, particularly related to power loss and difficulty starting, which seemed to be linked to the Doosan engine. This raised concerns about the engine’s performance and maintenance, leading to a broader discussion about possible causes and solutions.
Engine Issue Description
The user described difficulties starting the machine, particularly during cold starts, where the engine took an unusually long time to start. Some users also mentioned that after the engine started, the machine experienced unstable operation, with insufficient power, difficulty accelerating, or maintaining speed. These issues appeared to be related to internal engine faults rather than external factors like fuel or battery issues.
Potential Causes of the Problem
Several users in the discussion suggested possible causes for these issues:
- Fuel System Issues
Some users pointed to potential problems with the fuel pump or injectors. If the injectors are clogged or malfunctioning, they may cause insufficient fuel supply, leading to starting issues and poor engine performance. A clogged fuel filter might also restrict fuel flow, affecting engine operation.
- Air Intake System Problems
A blocked air filter or leaks in the intake system could also reduce the airflow to the engine, affecting its performance. If the air filter is dirty or clogged, the engine may not receive enough air, leading to inefficient combustion and resulting in power loss.
- Electrical System Problems
Another potential cause discussed was an electrical issue, such as a weak or faulty starting battery or starter motor. If the battery voltage is insufficient or there is an issue with the electrical connections, the engine may struggle to start.
- Internal Engine Issues
Some users suggested that internal engine problems, such as worn piston rings, damaged cylinder heads, or faulty valves, could be causing low compression, making it difficult for the engine to start and perform at full power.
In the discussion, some users shared their troubleshooting efforts. Initially, many checked the fuel system, including the fuel pump, injectors, and fuel filter. Some users also replaced the air filter and inspected the intake system, finding that a dirty air filter was indeed limiting airflow, which seemed to improve performance once replaced.
Additionally, some users replaced the starting battery and inspected the electrical wiring. Several users reported that replacing the battery helped improve the starting issue, though the power loss and performance problems persisted for some.
Conclusion and Recommendations
For users of the 2016 Bobcat T630 with a Doosan engine, addressing starting difficulties and power loss requires checking and maintaining several key components:
- Fuel System Inspection: Ensure the fuel pump, injectors, and fuel filter are working properly to avoid fuel supply issues.
- Air Intake System Inspection: Clean or replace the air filter and check for leaks or blockages in the intake system.
- Electrical System Check: Ensure the battery is fully charged, and check the starter motor and electrical connections for any faults.
- Internal Engine Inspection: If the issue persists, further inspection of the internal engine components, such as piston rings, cylinder heads, or valves, may be necessary.
For additional insights or troubleshooting experiences, users are encouraged to continue sharing their knowledge and solutions on Panswork, where other heavy equipment operators can provide valuable advice.