How To Flush Water Out Of Hydraulic System

I was recently asked about the procedure for flushing a hydraulic system to change from one type of fluid to another. Among the ideas mentioned regarding the use of brake cleaners, diesel fuel or some type of acid cleaner Read: how to drain water from the hydraulic system However, brake cleaners include certain chemicals such as acetone and tetrachlorethylene. These solvents are known to cause problems for nitrile, neoprene, millable polyurethane and silicone seals. Ethylene-propylene (EPDM) seals have very poor resistance to solvents and petroleum, and are not recommended when in contact with aromatic hydrocarbons or diesel. Therefore, depending on the type of O-rings and seals in your hydraulic system, solvents used in brake cleaners and diesel fuel can dry or damage your system’s O-rings. friend. There is also the issue of compatibility with the new fluid that has been selected. For these reasons, it’s important to understand how to properly flush or use an experienced drain service provider who can help you get the job done. In the Machine Lubrication article titled “Cleaning and Draining Basics for Hydraulic Systems and Similar Machinery,” Tom Oised outlined the process for comprehensive cleaning of a hydraulic system. . This would be the only “one size fits all” solution and an example of best practices. It involves mechanical and chemical cleaning of both components and systems. Of course, not everyone will perform a complete water change along with mechanical and chemical cleaning of individual components and systems every time a fluid change is performed. So let’s examine what should be done at a minimum to clean a hydraulic system.

Step 1

Contents

While the fluid is at operating temperature, drain the system completely, paying attention to the reservoir, all lines, cylinders, accumulator, filter housing, or any areas of fluid accumulation. Also, replace the filters.

Step 2

With a lint-free rag, clean all the sludge and residue in the sump. Make sure that the entire reservoir is free of any soft or loose paint.

Step 3

Read more: how to connect a ps4 to a dell monitor Flush the system with a lower viscosity fluid similar to that used. Reynolds numbers between 2,000 and 4,000 should be chosen to achieve sufficient turbulence to remove particles from the stream. Valves stroke regularly to ensure they are completely flushed. The liquid must be filtered and continued to drain until it reaches a level that exceeds the system’s target cleanliness level. For example, if the target is ISO 15/13/11, continue flushing the system until ISO 14/12/10 is reached.

Step 4

Drain the rinse water as hot and as quickly as possible. Replace the filters and check/clean the reservoir again.

Step 5

Fill the system with the liquid used to about 75 percent. Bleed/vented pump. If the pump has a pressure drop or bypass, it must be enlarged. Run the pump for 15 seconds, then stop and let it sit for 45 seconds. Repeat this process a few times to start the pump.

Step 6

Run the pump for one minute when bypassing or depressurizing. Stop the pump and let stand for one minute. Close the bypass and allow the pump to operate under load for no more than five minutes. Allow the drain valve to rise to confirm that it has also been discharged. Do not operate the actuator at this time. Stop the pump and let the system sit for about five minutes.

Step 7

Start the pump and operate the actuators in turn, allowing the liquid to return to the reservoir before moving on to the next actuator. After operating the last actuator, turn off the system. Monitor the liquid level in the storage tank. If the level drops below 25 percent, add more liquid and fill it up to 50 percent.

Step 8

Fill the tank to 75 percent and run the system for a period of 5 minutes. At each shutdown, air exits the system. Pay attention to the sound of the system to determine if the pump is humming.

Step 9

Run the system for 30 minutes to bring it back to normal operating temperature. Turn off the system and replace the filters. Inspect the tank for obvious signs of cross-contamination. If there is any sign of cross contamination, flush and re-flush the system.

Step 10

After six hours of operation, turn off the system, change the filter, and sample and test the liquid.

Step 11

The sampling frequency should be increased until you are sure that the fluid in the system is stable. Read more: how to use glow in dark spray paint Some adhesive machine deposits require more aggressive tactics than high speed flushing, so you must match flushing tactics and strategies to the problem you’re dealing with. try to solve by flushing. Once you understand the problem inside the machine that needs to be cleaned, you can choose the right flushing strategy to fix it. This issue has been described in Jim Fitch’s three-part series on Machine flushing, which can be read at topqa.info/Read/609/oil-flush, topqa.info/Read/634/oil-flushing- tactics and topqa. info / Read / 657 / flushing-oil. At this point, it is clear that a fluid change is more than just a flush and fill operation. Care must be taken to confirm that the system is as clean as possible before introducing new fluid. Most changeover procedures suggest that some old liquid will need to be drained from the bottom or be slid off the top of the tank after a period of time. Just because the changeover is complete doesn’t mean you’re “out of the woods”. Your system will need to be closely monitored for a while to ensure that the discharge is thorough. Taking the time to verify that the system is completely drained and removing old fluid before introducing new fluid will help ensure a healthier hydraulic system. Read more about hydraulic best practices: Seven most common hydraulic equipment failures Symptoms of common hydraulic problems and their root causes Negative effects of suction line filtration How do you know if you are using the right oil hydraulic? Read more: how to use lindy rig