5 Common Reasons for Hydraulic Failure

5 Common Reasons for Hydraulic Failure

November 30, 2022

A few factors should be considered to maintain a hydraulic pump in the right working conditions. Hydraulic hose burst is a common issue faced by operators using excavators. However, it shouldn’t be a problem if the entire hydraulic system is sound, leading us to look into the five common reasons for hydraulic failure.

1. Tube Erosion

With a high velocity of concentrated fluids passing through the internal tubes, erosion is possible as there might be particles that will gradually erode the inner tube. As the slow inner tube erosion occurs, it’s easy for an external leak to develop. 

2. Fluid Incompatibility

Not all fluids in the hydraulic system are compatible with the hoses in use. For instance, when a different liquid that is incompatible is applied to a high-quality hose, it might lead to the hose disintegrating from the inside and swelling. When the hose deteriorates, it’s a severe problem as particulate hydraulic contamination is inevitable. 

3. High Temperatures and Heat Aging

Exposure of hoses to extreme temperatures causes them to lose flexibility and become stiffened. The inner elastomeric tube is composed of plasticizers which, when exposed to high temperatures, will harden and begin cracking. The hardening and breaking start from inside but, with time, reaches the outer surface of the hose, posing a severe risk of hydraulic failure.

4. Abrasion

Since hydraulic hoses are not stationary, they are subject to abrasion as pressure begins changing within them. One of the most challenging issues is when the hoses rub against metal edges, leading to grazing, a common cause of hydraulic failure. Through abrasion, the reinforcing steel wire gets exposed, which will affect the functioning of the hydraulic system. 

5. Water Contamination 

When water mixes with the hydraulic fluid within the system, it is assumed to be one of the biggest blunders. The internal components start to erode gradually with too much water within the hydraulic system. In addition to corrosion, the water within the hydraulic system is still a threat as it might freeze, leading to the pump freezing.

Hydraulic Troubleshooting

Below are various ways you can apply to solve hose bursts or hydraulic failures based on the type of problem encountered within the system. 

System Inoperative

When the system starts to show signs of inoperative, we should look into the oil levels within the system. If there’s insufficient oil, then it should be refilled. It is also essential to refer to specifications to avoid the wrong oil in the system.

Erratic System Operation

When the system starts operating erratically, check on the air system, especially the suction side, in case of any leaks and repair immediately. Avoid adding cold oil directly, but you should provide ample warm-up period for the new oil into the system. Look for any damaged or dirty components and repair them accordingly.

Oil System Overheating 

With oil system overheating issues, check on the oil passing through the relief valve excessively and reset it to neutral, especially when not used. Then, use the appropriate oil as per the recommendations. 

Are you having problems with your hydraulic system? Look no further, as Royal Brass Incorporated has covered you. For our high-end and excellent services, kindly call us at (408) 297-6642, or reach out to us online today. 

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