How Can I Fix a Hydraulic Leak?

Hydraulic systems are used in a variety of different pieces of machinery and equipment today.  Hydraulics are often used in applications that need a significant amount of force to be applied, or when large pieces of equipment need to be manipulated or rotated.  Hydraulic systems can be found on heavy equipment or industrial machines, but also on many boats and other small lawn and garden equipment.

A hydraulic system consists of:

  • A reservoir of hydraulic fluid or hydraulic oil
  • A pump
  • A series of hoses and valves
  • hydraulic rams or motors.

When one of the valves are actuated, the hydraulic pump draws fluid from the reservoir and pushes it at high pressure through the hoses to the proper rams or motors moving the equipment.  Since most hydraulic systems are designed to move heavy equipment or create high pressures, the hydraulic fluid is often at very high pressures, from 1000 PSI to more than 5000 PSI.

Due to the high pressure, and constant motion of the rams, motors and pump, it’s not unusual to find leaks in your hydraulic system even with proper maintenance.  You will notice these leaks possibly by a lack of power or force in your system, or more obviously in a fluid leak or drip.  Replacing hydraulic seals is a difficult job that often requires specialty tools and a detailed knowledge of the system.  Also, the close tolerances and smooth machined surfaces in the system make many of the components susceptible to damage if improperly handled or if the wrong tool is used.

If you notice a loss of power or have a leak in your system, the best way to fix your problem is to use BlueDevil Hydraulic Stop Leak.  BlueDevil Hydraulic Stop Leak is a unique plasticizer that does not contain petroleum distillates.  BlueDevil Hydraulic Stop Leak will absorb into the seals in your hydraulic system restoring them back to their original size and flexibility without clogging or harming other components in any
way.  BlueDevil Hydraulic Stop Leak will mix with the hydraulic fluid in your system and can stay there permanently, or even be retreated.

BlueDevil Hydraulic Stop Leak works so well it is guaranteed to make a permanent seal.  Order BlueDevil Hydraulic Stop Leak here.

BlueDevil Hydraulic Stop Leak

You can also pick up BlueDevil Hydraulic Stop Leak at the following auto parts stores:

  • Bennett Auto Supply
  • CarQuest Auto Parts
  • Prime Automotive
  • AutoZone
  • Advance Auto Parts
  • Pep Boys
  • NAPA

 

Pictures Provided by: www.customhydraulics.ca, www.maxmachinery.com and www.tractorbynet.com

60 responses to “How Can I Fix a Hydraulic Leak?

  1. Can your hydraulic fluid stop leak be used in the hydraulic oil system in a convertible top for a 1994 Mercedes sl500. How does it compare to the lucas hydraulic stop leak and booster. Thank you, Mike

    1. Michael-

      Yes, you may use the BlueDevil Hydraulic Stop Leak to seal a leak in the hydraulics for your convertible top. We have successfully used it for this in the past. You will only need to add about 1 ounce of the BlueDevil due to the small capacity. Keep in mind, it may take a few days before you notice results. Overall, the product carries a success rate of about 95%.

      Feel free to contact us at 888-863-0426 with any questions.

      Thank you!

      -BDP

    2. Hi, my saab 2004 has a ram in its roof which is leaking. I have tried some thing already bt could not work. I live in western australia. First tell me that is really going to work??? And how can i get it?
      Waiting
      Arshad Ali

    1. Clay-

      You would be able to use the BlueDevil Power Steering Stop Leak for your boat. As long as you are not losing fluid too quickly, you should be able to see some great results.

      Thank you!

      -BDP

  2. Noticed a small amount of hydraulic fluid coming from the top of the hydraulic cylinder on my outboard engines trim and tilt. How much leak stop should i put in .

    1. Guy-

      No, BlueDevil Hydraulic Stop Leak does not harden or thicken at any point. However, it is not designed to seal the type of leak you are experiencing. BlueDevil Hydraulic Stop Leak is specifically made to stop fluid loss originating from rubber seals/gaskets.

      Thank you!

      -BDP

      1. I’m sorry, please explain why your hydraulic leak stop isn’t intended to stop a leak on a hydraulic cylinder? I’m at a loss of what it is intended for if it cannot be used to stop that type of leak.

        1. John-

          In most cases a hydraulic cylinder leak is due to the hydraulic seals leaking. If that is the case, BlueDevil Hydraulic Stop Leak will work to stop any fluid loss.

          Thank you!

          -BDP

  3. Please sir,help us here u see the hydraulic cylinder leaking we Av tried to weld it but it is leaking give us the real solution

    1. Maranga-

      Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the issues you are having and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  4. I have a john deere z960a lawn mower and the wheel motors are leaking fluid can I use this product in my hydralic system with out any problem

    1. Paul-

      Yes, the BlueDevil Hydraulic Stop Leak would be safe to use in your John Deere lawn mower. You will be using 1 oz of the product per quart of fluid in the system. Feel free to contact our technical support team at 888-863-0426 with any other questions.

      Thank you!

      -BDP

    1. Jason-

      BlueDevil Hydraulic Stop Leak is compatible to use in the trim and tilt. We recommend adding 1 ounce of BlueDevil per every 1 quart of capacity.

      Feel free to contact our tech support team at 888-863-0426 with any further questions.

      Thank you!

      -BDP

  5. Hi,

    One of my trim cylinders on my boats outdrive developed a small leak on the top seal. The system uses ATF dex 2 fluid. Can this be mixed with this fluid or should I use your Automatic transmission stop leak product?

    Thanks

    1. Travis-

      Yes, BlueDevil Hydraulic Stop Leak is compatible to use in the ATF Dex 2 Fluid. You should add 1 ounce of BlueDevil per every 1 quart of fluid capacity. Once added, you can expect to start seeing results after about 1 – 2 hours of use.

      Thank you!

      -BDP

      1. Thanks for the reply, much appreciated. My local auto parts store only stocks your transmission stop leak product, would that be just as effective as your hydraulic stop leak? I am just trying to avoid ordering this online

        1. Travis-

          Yes, it would be compatible to use BlueDevil Transmission Sealer. When applying the product use the same ratio: 1 ounce of BlueDevil treats 1 quart of fluid capacity.

          Thank you!

          -BDP

    1. Jim-

      Yes, the BlueDevil Hydraulic Stop Leak is safe for use in your Exmark zero turn mower. The product does not harden or thicken in any way, so it would not have any adverse affects on the pump operation.

      Thank you!

      -BDP

  6. I have an electric log-splitter which seems to be leaking a small amount of fluid through two of the hoses. The leak is not at a fitting — it seems to be coming right through the hose. However the hose does not seem to be worn at all. What can I do about it?

    1. Keith,

      Thanks for your question about your log splitter. If you are getting hydraulic fluid leaking through the hose then it is most likely that there are some hairline cracks in the hose and your best bet would be to replace it. You may be able to purchase a replacement hose from the manufacturer, or you can try getting a new hydraulic hose made at one of your local auto parts stores.

      Thanks again for your question!
      -BD Auto Pro

    1. Billy-

      The BlueDevil Hydraulic Stop Leak will revitalize and recondition the rubbers in the system, and swell or expand them back to their original state. It will not overexpand the rubber or damage any new or rebuilt seals. Feel free to contact our technical support team at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  7. I have a end dump trailer hydraulic piston leak on the rings. Will this product work? And how much would I used?

    1. Victor-

      Based on your description, we recommend using the BlueDevil Hydraulic Stop Leak. You will be using one oz of the product per quart of fluid in the system.

      Thank you!

      -BDP

  8. Hi I have a 95 Chrysler Sebring LX, my power steering system is constantly leaking and making whining noise when I turn the steering wheel, I been adding power steering fluid on a lot, the step leak by Lucas is not helping out at all whatsoever, so if I buy your hydraulic system stop leak and add one oz in it, that will stop the leak and I can be satisfied with the results in a matter of days,

    1. Brad-

      Thank you for asking about your Chrysler Sebring. Based on your description, it sounds like you may have an issue with the power steering pump. Unfortunately, we do not manufacture a product intended to seal a leaking power steering pump. A hard part repair may be your best option.

      Hope this helps!

      -BDP

    1. W.B.-

      Yes, the BlueDevil Hydraulic Stop Leak would be able to seal the leak on your Terex. You will be using one ounce of the product per quart of fluid in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  9. WE HAVE A 1984 JOHNSON OUTBOARD 115 HP MOTOR – THE TRIM/TILT HYDRAULIC MOTOR STOPPED WORKING FOR THE
    UP/DOWN TILT MOVEMENT – EVERYTHING SEEMS TO WORK OK, BUT IT APPEARS THE MOTOR IS NOT PUMPING AS THE OIL MUST BE LEAKING PAST THE SEALS OR WHATEVER – WILL YOUR HYDRAULIC SEALER WORK TO FIX THE PROBLEM?

    1. Capt. Ellis Stanley-

      Thank you for asking about your Johnson outboard motor. Based on your description, we would recommend using the BlueDevil Hydraulic Stop Leak. You will be using one ounce of the product per quart of fluid in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  10. I have a Stingray 185 lx with a Penta engine and stern drive.
    The Trim hydraulic pump is leaking at the hose fitting.
    Looks like the fluid is leaking out the threads and the metal fitting.

    Replaced the oring, but still have a leak. Will your Hydraulic Stop Leak work on the fitting thread leak?

    1. Paul-

      Thank you for asking about your Stingray 185 lx. The BlueDevil Hydraulic Stop Leak in only intended for the rubbers in the system. Based on your description, it seems like your leak is coming from the metal fitting, which the product would not have any effect on. A hard part repair may be your best option.

      Hope this helps!

      -BDP

  11. Can it be used in farm tractors that share fluid between the transmission and the hydraulics system
    I have a Long 560 tractor with small trans/hydraulic leak out of the weep hole on the bottom

    1. Dana-

      Yes, it is safe to use the BlueDevil Hydraulic Stop Leak on your farm tractor. You will be using 1 oz. of the product per quart of fluid in the system.

      Thank you!

      -BDP

  12. Hi
    I have a 1999 Jaguar XK8. A portion of one of its hydraulic hoses that operate the convertible roof had been replaced and reconnected to the old hose with a fitting that goes on top of the hose’s outer skin. This fitting is now leaking oil probably because the skin of the old hose cracked (it’s a known problem). The system uses Pentosin CHS-11 hydraulic fluid.
    Can your product help to seal the leak between the fitting and the hose?
    Is it safe to use your product with Pentosin CHS-11?

    Thank you

    1. Sam-

      Thank you for asking about your Jaguar XK8. The BlueDevil Hydraulic Stop Leak is intended for the rubber seals in the system. It will revitalize and recondition the rubbers in the system and swell, or expand them back to their original state. Yes, the product is compatible with Pentosin CHS-11. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

    1. Brian-

      Thank you for asking about your Nissan. The BlueDevil Hydraulic Stop Leak is only intended for rubber seals/gaskets. Unfortunately, BlueDevil doesn’t manufacture a product for the type of leak you have described. A hard part repair may be your best option.

      Thank you!

      -BDP

    1. Ron-

      Thank you for asking about your JC Mini CC. Typically, you would start to see improvement after about 100 miles of driving. Depending on the size of the leak, it may take up to around 200 miles before you see the full benefit of the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  13. Can your product will be used in aluminium cold rolling mill hydraulic system where we are using a heavy normal paraffin based hydraulic oil with viscosity of 32cst?
    What are the side effects if your product will fall on our aluminum strip and get rolled.? Do you have any reference In aluminum cold rolling mill where your product is used successfully.

    1. Vinayak-

      Thank you for your question. The BlueDevil Hydraulic Stop Leak is only intended for, and will only have an affect on the rubbers in the system. It does not harden or thicken in anyway, so it would not have any adverse affects on the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  14. I work on hydraulic traffic gates and have some slow leaking hose connections would this stop the leaks and if so would it effect the pump or valves in any way?

  15. We have a leak on a dental chair located in a mission clinic in Haiti where we are unable to find someone who can repair. Would this product be safe to use for this application?

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