Purchased a 2014 T770 at an auction without inspecting it beforehand. Despite the good price, I took a risk. The machine operates well, but when I tried to change the fluids, I discovered water contamination. Upon further investigation, I found that the hydraulic reservoir cap was broken, leaving only the threads/plug. The bottom of the cap had also separated from the threads, allowing water to enter the tank. Thankfully, I have a good relationship with the auction house and they provided me with the previous owner's contact information. He was honest and willing to address the issue. He mentioned that the cap broke off around 200-300 hours ago and believed it was still watertight due to the remaining components. I flushed 15 gallons of hydraulic fluid through the system until the oil was clean. The machine appears to have been well-maintained despite its age. I have concerns about the long-term effects of water contamination and if additional steps should be taken to remove any remaining water from the system. It is challenging to completely eliminate the water with each drain. Your insights on whether the machine is at risk and any further actions I can take would be appreciated. Thank you.
The presence of water in hydraulic systems can lead to detrimental effects. The amount and duration of water exposure can deteriorate additives and promote corrosion, compromising the protection of critical surfaces. It is important to regularly inspect the hydraulic filter for any signs of contamination, such as cloudy oil. Consider analyzing both old and new oil samples to determine the water parts per million (ppm) content. There are industry specifications for acceptable levels of water in hydraulic systems.
Answer: - Water contamination in a hydraulic system can lead to corrosion, reduced lubrication efficiency, and potential damage to components such as pumps, valves, and cylinders.
Answer: - Water can enter a hydraulic system through broken seals, damaged caps, or condensation. Signs of contamination include milky or cloudy hydraulic fluid, reduced system performance, and increased wear on components.
Answer: - Flushing the system with clean hydraulic fluid, using water-absorbing filters, and ensuring proper maintenance of seals and caps can help remove water from a hydraulic system.
Answer: - Long-term effects of water contamination can include accelerated wear on components, reduced system efficiency, and potential system failure if not addressed promptly.
Answer: - While the machine appears well-maintained, it is still at risk of damage from residual water contamination. Additional steps such as regular monitoring, using water-detecting sensors, and consulting with a hydraulic system specialist can help mitigate risks.
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