Hitachi FH130-3: Troubleshooting Electrical and Hydraulic Issues

[MikePhua]

The Hitachi FH130-3, a crawler excavator produced in the late 1990s, has been a reliable workhorse for many operators. However, like any heavy machinery, it is not without its challenges. This article delves into some common issues faced by owners and provides insights into possible causes and solutions.
Electrical System Anomalies
One recurring problem reported by operators is the persistent illumination of the power mode indicator lights, even when the ignition is off. A notable instance involved a 1997 FH130-3 where the power mode lights remained on until fuse number 6 (5A) was removed. Once the fuse was pulled, the machine would start, and the fuse could be reinserted to restore dashboard functionality. However, turning off the engine would cause the power mode LEDs to stay lit until the fuse was removed again, and the relay above the batteries would disengage, cutting all power. This suggests a potential issue with the electrical relay or the fuse circuit.
Hydraulic System Challenges
Hydraulic issues are another area of concern. Some operators have reported overheating of the engine after approximately 30 minutes of use. Despite cleaning the radiator and ensuring no pressure in the radiator system, the problem persisted. This could indicate a malfunctioning water pump or a blockage in the hydraulic system, leading to inadequate cooling.
Fuel Delivery and Engine Performance
Engine performance problems, such as struggling to stay running and inability to rev up, have also been noted. In one case, the engine would start but wouldn't rev up, resembling symptoms of fuel starvation. The issue was suspected to be related to the injector pump, which can be costly to replace. Before considering a replacement, it's advisable to inspect the fuel lines for air leaks or blockages and ensure the fuel filter is clean.
Undercarriage Wear and Maintenance
The undercarriage of the FH130-3 is subject to significant wear due to constant contact with the ground. Regular maintenance is crucial to ensure optimal performance. For instance, a video demonstration showed the process of replacing rollers, idlers, sprockets, and recoil units on the FH130-3, highlighting the importance of timely undercarriage repairs to maintain machine stability and efficiency.
Conclusion
While the Hitachi FH130-3 is a robust and dependable excavator, it is not immune to mechanical and electrical issues. Regular maintenance, timely troubleshooting, and understanding the common problems associated with this model can help operators keep their machines running smoothly. By addressing issues promptly and consulting with experienced technicians when necessary, the FH130-3 can continue to serve effectively in various construction and excavation tasks.