cat excavator hydraulic system troubleshooting


As a website operator, I have noticed that one of the most common issues cat excavator owners face is hydraulic system failures. The hydraulic system plays a crucial role in the performance of the machine, and any malfunction can lead to decreased productivity, increased maintenance costs, and, more importantly, the risk of accidents. In this article, we will discuss the common hydraulic system problems encountered on cat excavators and how to troubleshoot them.

Low Fluid Levels

The hydraulic system requires an adequate amount of hydraulic fluid to operate correctly. Low fluid levels are one of the most common reasons for a hydraulic system failure. This could be due to leaks, fluid evaporation or incorrect fluid monitoring. To troubleshoot this problem, the first thing to check is the hydraulic fluid level, which is typically done using a dipstick located on the hydraulic tank. If the fluid level is low, refill with the recommended fluid type and check for leaks.

Clogged Filters

Filters play a vital role in preventing contaminants from entering the hydraulic system. Over time, filters become clogged due to dirt, debris, and other contaminants, leading to a drop in pressure and preventing the proper flow of hydraulic fluid. To troubleshoot this problem, inspect and replace the filters regularly. This is typically recommended every 250 hours or after the hydraulic system has been repaired.

Contaminants in Fluid

Contaminants such as water, dirt, and metal shavings can cause damage to hydraulic components such as pumps, valves, and cylinders. This often results in sluggishness, reduced power, and abnormal noises. The hydraulic fluid must be regularly inspected and changed to prevent such contamination. Hydraulic fluid analysis can be conducted to monitor fluid quality and detect the presence of contaminants.

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Worn or Damaged Parts

The hydraulic system comprises many parts such as hoses, fittings, cylinders, and pumps, which are susceptible to wear and damage over time. Worn or damaged parts can cause leaks, pumping inefficiency, and other issues. To troubleshoot this problem, inspect the hydraulic system components regularly, and replace any damaged or worn parts.


Cat excavator hydraulic system failures can lead to negative implications for productivity, safety, and maintenance costs. Regular inspection, maintenance, and troubleshooting are essential for troubleshooting hydraulic system problems. When it comes to hydraulic system troubleshooting, the proper identification of problems is always the best starting point for effective maintenance. With these tips, cat excavator owners can avoid costly hydraulic system failures and ensure their machines are operating at maximum performance.