How Can I Fix a Hydraulic Leak?

#driveyourlife

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.

What is a hydraulic system?

  • 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.

How do you fix a hydraulic leak?

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 for a quick, easy fix.

BlueDevil Products can be found on Amazon.com or at AutoZone, Advance Auto Parts, O’Reilly Auto Parts, NAPA, and other major auto parts retailers.

242 responses to "How Can I Fix a Hydraulic Leak?"

242 Comments

  1. Michael Trifaro on September 27, 2015 at 10:48 pm

    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

    • BlueDevil Pro on September 28, 2015 at 11:21 am

      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

      • Matt on December 21, 2016 at 1:33 pm

        What about in my boat steering system. Would it help there? I have found a small leak in one of the lines which I will be patching. I believe it is a low pressure system since the cap of loosely fitted.

        • BlueDevil Pro on December 21, 2016 at 2:48 pm

          Matt-

          Based on your description, we actually recommend using the BlueDevil Power Steering Stop Leak http://store.gobdp.com/power-steering-stop-leak-00232/. The product is only intended for the rubber seals/gaskets, however, so it would depend on the type of material your line is made of. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

        • Gary on August 11, 2023 at 8:41 pm

          How about the hydraulics on a travel trailer. The sliders are leaking, and leveling legs lose pressure.

      • Jordan T Febrey on September 26, 2020 at 7:18 pm

        Will blue devil work in a resivore with 15w-40 rotella oil it’s a case 446 tractor with Johnson loader its leaking from both tilt cylinders

        • BlueDevil Pro on September 28, 2020 at 8:47 am

          Jordan-

          Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use with 15w-40 Rotella oil. You should expect to start seeing results after 1-2 hours of operation.

          Thank you!

          -BDP

          • Suraj Kannan on October 12, 2020 at 4:18 pm

            Will it work for 2013 Jeep Grand Cherokee power steering pump leak? I’ve been told to only use the specified power steering fluid for this car, so I am bit concerned to use any stop leak fluids. Do you think it might work?



          • BlueDevil Pro on October 13, 2020 at 9:33 am

            Suraj-

            Thank you for asking about your Jeep Grand Cherokee. Unfortunately, BlueDevil would not be able to seal a leaking power steering pump. Because of the extreme pressure and the pump pushing fluid through the system, the product would not be able to stay in the pump to be able to seal it. Replacing the power steering pump would be your best option.

            Thank you!

            -BDP



          • Shannon Necaise on September 27, 2021 at 9:18 am

            Will this repair a leak in the convertible roof hydraulic lines of a 2012 BMW Z4?



          • BlueDevil Pro on September 27, 2021 at 11:49 am

            Shannon-

            BlueDevil Hydraulic Stop Leak would work to seal leaks coming from rubber seals/gaskets. It would not be able to seal leaking lines or hoses. Replacing the lines may be your best option.

            Thank you!

            -BDP



      • chase on February 7, 2022 at 8:06 pm

        How much should I put in the hydraulic system on my 30 hp farm tractor? Will it stop the hydraulic cylinder leaks I have ?

        • BlueDevil Pro on February 8, 2022 at 9:06 am

          Chase-

          You would use one oz. of the BlueDevil Hydraulic Stop Leak per quart of hydraulic fluid in the system. The product is intended to treat rubber seals. If the leak is coming from an o ring or another rubber component, and you are not losing fluid too quickly, the product should be able to seal.

          Thank you!

          -BDP

        • Keith Fuller on March 29, 2022 at 1:29 pm

          Can the sealwr be used in a bucket truck running a AW 22 non conductive hydraulic fluid?

          • BlueDevil Pro on March 30, 2022 at 8:29 am

            Keith-

            The BlueDevil Hydraulic Stop Leak is safe and compatible for the application you’ve described. You will use one oz. of the product per quart of fluid capacity. Feel free to contact our technical support line at 888-863-0426 with any other questions.

            Thank you!

            -BDP



      • Anthony Stevens on May 25, 2022 at 4:33 am

        Have a small leak from hydraulic roof ram in my Jaguar 1999 XK8.

        Outdated your product be safe to use and if so is it available in UK

        • BlueDevil Pro on May 25, 2022 at 8:41 am

          Anthony-

          Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use in your Jaguar XK8. You will use one oz. of the product per quart of fluid capacity. Expect to start seeing results after 1-2 hours of operation.

          Thank you!

          -BDP

      • Crissy on June 10, 2022 at 11:37 am

        Can it work on leaking hydraulic line on a bucket truck

        • BlueDevil Pro on June 10, 2022 at 4:18 pm

          Crissy-

          The BlueDevil Hydraulic Stop Leak would only have an effect on rubber seals/gaskets. It would not seal leaking pressure lines or hoses. Replacing the line would be your best option.

          Thank you!

          -BDP

          • Bill Fink on August 31, 2022 at 12:22 am

            John Deere backhoe 1973 that has 30w non deterrent oil for hydraulic oil. What would you suggest for it because someone put it wrong oil and all cylinders started leaking.



          • BlueDevil Pro on August 31, 2022 at 8:32 am

            Bill-

            Thank you for asking about your John Deere Backhoe. How quickly are you losing oil? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



    • Arshad Ali on March 31, 2016 at 10:50 am

      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

    • anthony vogler on June 14, 2023 at 11:53 am

      Can I put Blue Devil hydraulic stop
      leak in the hydraulic system of my Scag Turf Tiger.
      Thanks, Tony

      • BlueDevil Pro on June 14, 2023 at 4:56 pm

        Anthony-

        Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use in the application you’ve described. You will use one oz. of the product per quart of fluid. Expect to start seeing results after 1-2 hours of operation.

        Thank you!

        -BDP

    • Dane Mulligan on July 3, 2023 at 5:28 pm

      Hey Michael,
      I was checking out this product and discovered your post. As it turns out – I own a 94 Mercedes SL500, too.
      Your question to Blue Devil is from 2015; it’s currently July of 2023. So the chances are slim you get this; but I’d love to know if this product worked or had any problems. My main lift cylinder/drivers side is leaking big time.
      Feel free to text me at 541-399-6878.
      Hope to hear from you – thanks!
      Dane

      • BlueDevil Pro on July 5, 2023 at 9:13 am

        Dane-

        Feel free to contact our technical support line at 888-863-0426 with any questions.

        Thank you!

        -BDP

      • Alma on July 25, 2023 at 11:40 am

        Can I use bluedevil stop leak on a hydralic motor for a floor chain trailer

        • BlueDevil Pro on July 25, 2023 at 1:42 pm

          Alma-

          Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use for the application you’ve described. You will use one oz. of the product per quart of hydraulic fluid/oil. You should expect to start seeing improvement after 1-2 hours of operation.

          Thank you!

          -BDP

  2. Clay on October 10, 2015 at 10:40 pm

    Can you use the product a Volvo 4.3l boat engine for a power steering leak? It is leaking from the ram seals I think

    • BlueDevil Pro on October 13, 2015 at 4:04 pm

      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

  3. Frank on October 17, 2015 at 9:09 pm

    Can this product be used in system using TD-3 hydraulic fluid

    • BlueDevil Pro on October 21, 2015 at 11:49 am

      Frank-

      Yes, the BlueDevil Hydraulic Stop Leak can be used with TD-3 hydraulic fluid. You will be using one oz of the product per quart of fluid in the system.

      Thank you!

      -BDP

  4. George on October 19, 2015 at 6:03 pm

    Would this work on a 03 Mercedes cl500 hydraulic suspension system. There’s a leak In the hydraulic pump I think.

    • BlueDevil Pro on October 21, 2015 at 11:02 am

      George-

      Yes, you would be able to use the BlueDevil Hydraulic Stop Leak in your Mercedes. You will be using one oz of the product per quart of fluid in the system.

      Thank you!

      -BDP

      • Josr on August 9, 2019 at 4:17 pm

        In mine it blow the valve block and started leaking realy bad

        • BlueDevil Pro on August 12, 2019 at 9:35 am

          Josr-

          If you are losing fluid at a rapid rate, the only option may be replacing the valve.

          Thank you!

          -BDP

        • Scotty mccoy on January 2, 2021 at 7:51 pm

          Well this work and a John Deere 455 garden tractor? the hydraulic cylinder that works my three point hitch has a leaky seal. It uses low velocity hydro oil. this be compatible? If so what is the percentage of this stop leak do I use? Thanks

          • BlueDevil Pro on January 4, 2021 at 1:54 pm

            Scotty-

            Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use on your John Deere. You would use one oz. of the product per quart of fluid in the system. Expect to start seeing results after 1-2 hours of operation.

            Thank you!

            -BDP



    • John on June 12, 2016 at 10:12 am

      Hi George did this work in your ABC system?? I have the same issue this morning

  5. john mataitis on November 2, 2015 at 1:06 pm

    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 .

    • BlueDevil Pro on November 2, 2015 at 3:14 pm

      John-

      Thank you for your question. You will be using one oz of the BlueDevil Hydraulic Stop Leak per quart of fluid in the system.

      Thank you!

      -BD:

  6. Guy on January 26, 2016 at 3:15 pm

    I have a cardboard baler the top of hydraulic cylinder is leaking will this product gum up motor and the pump system?

    • BlueDevil Pro on January 26, 2016 at 4:02 pm

      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

      • John on January 29, 2016 at 6:01 pm

        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.

        • BlueDevil Pro on February 1, 2016 at 10:37 am

          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

  7. maranga job kenya on March 8, 2016 at 12:00 am

    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

    • BlueDevil Pro on March 10, 2016 at 11:16 am

      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

  8. Paul on March 30, 2016 at 11:29 pm

    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

    • BlueDevil Pro on March 31, 2016 at 9:30 am

      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

  9. Jason on April 4, 2016 at 11:10 am

    Have you had anyone use or have any feedback for use in the trim and tilt of outboard motors?

    • BlueDevil Pro on April 7, 2016 at 8:52 am

      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

      • Richard Fortin on July 11, 2020 at 3:30 pm

        may i use for floor jack

        • BlueDevil Pro on July 13, 2020 at 9:37 am

          Richard-

          Yes, the product would be safe and compatible to use on a floor jack. Use one oz. of the product per quart of fluid. Feel fee to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

  10. Travis Crawford on April 4, 2016 at 3:28 pm

    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

    • BlueDevil Pro on April 5, 2016 at 4:33 pm

      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

      • Travis on April 8, 2016 at 1:28 am

        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

        • BlueDevil Pro on April 8, 2016 at 8:43 am

          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

  11. Jim on April 9, 2016 at 8:54 am

    Is this fluid safe for use in Exmark zero turn mowers. Concern is hydro pump operation.

    • BlueDevil Pro on April 11, 2016 at 12:52 pm

      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

  12. Keith Miller on April 15, 2016 at 1:17 pm

    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?

    • BlueDevil Pro on May 12, 2016 at 4:59 pm

      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

  13. Billy on May 1, 2016 at 7:58 am

    Will blue devil damage my fresh rebuilt cylinder seals on backhoe.

    • BlueDevil Pro on May 2, 2016 at 10:14 am

      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

  14. Victor on May 4, 2016 at 9:45 am

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

    • BlueDevil Pro on May 4, 2016 at 11:38 am

      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

  15. Brad King on May 23, 2016 at 10:51 am

    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,

    • BlueDevil Pro on May 25, 2016 at 2:14 pm

      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

  16. W.B.Yates on May 24, 2016 at 7:03 am

    The wheel seals on my terex telehandler are leaking …will your product stop the leak?

    • BlueDevil Pro on May 25, 2016 at 8:47 am

      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

  17. CAPT. ELLIS STANLEY on May 24, 2016 at 10:41 pm

    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?

    • BlueDevil Pro on May 27, 2016 at 9:56 am

      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

    • Kevin on January 26, 2018 at 11:22 am

      My JCB 3DX super got a crack on its loader valve block & leaking oil. Can I use blue devil to stop the leak??

      • BlueDevil Pro on January 26, 2018 at 2:42 pm

        Kevin-

        Unfortunately our product is not designed to seal a crack. BlueDevil Hydraulic Stop Leak is made to stop leaks coming from rubber seals and gaskets.

        Feel free to contact us with any questions.

        Thank you!

        -BDP

  18. Paul Morinishi on June 6, 2016 at 10:31 pm

    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?

    • BlueDevil Pro on June 17, 2016 at 9:11 am

      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

  19. Dana on July 30, 2016 at 2:32 pm

    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

    • BlueDevil Pro on August 1, 2016 at 2:59 pm

      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

  20. Sam on August 7, 2016 at 5:13 pm

    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

    • BlueDevil Pro on August 10, 2016 at 3:09 pm

      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

      • Sam on August 10, 2016 at 7:16 pm

        It looks like this is not applicable to my situation.
        Thank you for the professional response – much appreciated.

  21. Craig on August 16, 2016 at 10:58 am

    Is it safe to use in a 210c John deer backhoe? I seem to have small weeping leaks on 3 of the Rams, from the seals.

  22. Brian Mahon on August 18, 2016 at 2:50 am

    My clutch hydraulic slave cylinder on my Nissan van is leaking will BlueDevil seal it

    • BlueDevil Pro on August 18, 2016 at 1:15 pm

      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

  23. Ron on September 1, 2016 at 2:07 am

    I bought this formy jc mini cc from leaking hydraulic oil from An unknown area and it let it run for a hour . No results

    • BlueDevil Pro on September 1, 2016 at 9:08 am

      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

  24. Vinayak gawali on September 11, 2016 at 12:14 pm

    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.

    • BlueDevil Pro on September 12, 2016 at 12:16 pm

      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

  25. Aarronmvi on September 29, 2016 at 3:03 am

    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?

    • BlueDevil Pro on September 29, 2016 at 11:09 am

      Aarronmvi-

      Based on your description, we would recommend using the BlueDevil Hydraulic Stop Leak, http://store.gobdp.com/hydraulic-stop-leak-00238-00239/ . The product will only have an effect on the rubbers in the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  26. cwhaz on November 24, 2016 at 11:12 am

    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?

  27. David Hall on January 10, 2017 at 10:38 pm

    Will this product work with mil spec 5606 fluid? Its for an Altec 37g boom lift.

    • BlueDevil Pro on January 11, 2017 at 8:41 am

      David-

      Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use with mil spec 5606 fluid. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  28. Tim on January 11, 2017 at 9:24 pm

    Hi
    I have a 2012 Cat 262 skidsteer with a leaky hydraulic pump seal. Will your product work on my skidsteer?

    • BlueDevil Pro on January 12, 2017 at 9:07 am

      Tim-

      Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use in your Cat 262 skidsteer. You should expect improvement after about 2 hours of operation.

      Thank you!

      -BDP

  29. Cesar on February 22, 2017 at 3:42 pm

    Will this work in a stand up forklift, Clark? Using Hydraulic oil 68. Thanks for your time.
    CG—

    • BlueDevil Pro on February 23, 2017 at 9:11 am

      Cesar-

      Yes, the BlueDevil Hyrdraulic Stop Leak (http://store.gobdp.com/products/) is safe and compatible to use in your stand up forklift using Hydraulic oil 68. You should expect to see results after about 2 hours of operation.

      Thank you!

      -BDP

  30. Kara on March 12, 2017 at 5:17 pm

    Will this fix hydraulic pump leak on Nissan convertible?
    Thanks
    K

    • BlueDevil Pro on March 13, 2017 at 9:42 am

      Kara-

      If it is the rubber seal or gasket leaking then BlueDevil Hydraulic Stop Leak will work to stop the leak.  You should add 1 ounce of BlueDevil Hydraulic Stop Leak per every 1 quart of capacity; do not add more than recommended amount.  Expect to start seeing results after approximately 1 – 2 hours of use.

      Thank you!

      -BDP

      • Kent on April 22, 2024 at 10:34 am

        I have a TimberPro 735B tree harvester with piston pumps. There is a leak on the Danfoss valve bank. The seals between the sections seep slowly. Would this product be ok to use? I run a synthetic AW46 hydraulic fluid.

        • BlueDevil Pro on April 22, 2024 at 11:51 am

          Kent-

          Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use in your TimberPro with synthetic hydraulic fluid. You would use one oz. of the product per quart of fluid. Expect to start seeing results after 1-2 hours of operation.

          Thank you!

          -BDP

  31. Toni on April 3, 2017 at 2:15 pm

    I have a motorhome with hydraulic leveling jacks, brand name is PowerGear. They use red ATF fluid and a couple of them are leaking intermittently. Will Hydraulic Stop Leak provide benefit for this?

    • BlueDevil Pro on April 4, 2017 at 10:42 am

      Toni-

      Thank you for asking about your Motorhome. The BlueDevil Hydraulic Stop Leak (http://store.gobdp.com/hydraulic-stop-leak-00238-00239/) is only intended for the rubber seals/gaskets in the system. If the leak is coming from one of those rubber seals/gaskets, then we would recommend using the product for this type of application.

      Thank you!

      -BDP

  32. john rogers on April 15, 2017 at 8:44 am

    I have a john deere 425 lawn tractor with a hydrostatic trans. it seems to be loosing fluid somewhere . would blue devil work and be safe to use on my jd 425. thank you for your help

  33. Elizabeth Jones on April 18, 2017 at 9:09 pm

    Will it work on a Kubota tractor hydraulic fluid leak.

    • BlueDevil Pro on April 19, 2017 at 11:00 am

      Elizabeth-

      Yes, BlueDevil Hydraulic Stop Leak has been successful in this exact application in the past. You should apply 1 ounce of BlueDevil per every 1 quart of fluid capacity. Expect to start seeing results after approximately 1 – 2 hours of use of your tractor.

      Thank you!

      -BDP

  34. RONNIE on April 29, 2017 at 5:54 am

    WILL THIS WORK WITH pentosin chf 7.1

    • BlueDevil Pro on May 1, 2017 at 10:03 am

      Ronnie-

      Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use with pentosin chf 7.1. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

      • RONNIE on May 1, 2017 at 12:07 pm

        VERY GOOD WANT TO USE IT IN MY SLS PUMP FOR MY BMW
        WHAT IS THE CORRECT AMOUNT TO USE?

        • BlueDevil Pro on May 1, 2017 at 1:19 pm

          Ronnie-

          You will be using one oz. of the product per quart of fluid in the system.

          Thank you!

          -BDP

  35. E Forestry LLC on April 30, 2017 at 1:45 am

    We have a 1996 Tigercat 720 Feller Buncher with 4 hydraulic pumps and a 14 section Valve body it is seeping hydraulic oil many places where pieces come together. Would Blue Devil assist in stopping leaks in a system that holds 70 Gallon of hydraulic fluid ?

    • BlueDevil Pro on May 1, 2017 at 10:59 am

      E Forestry LLC-

      The BlueDevil Hydraulic Stop Leak would be able to stop the leaks in your Tigercat 720 Feller Buncher, however, you would be using one oz. of the product per quart of fluid in the system. For a 70 gallon system, you would need a little more than 2 gallons of the BlueDevil Hyrdraulic Stop Leak (http://store.gobdp.com/hydraulic-stop-leak-00238-00239/) to properly treat the system. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  36. Randy on May 5, 2017 at 6:13 pm

    Hi,
    I have a Cat 303.5C CR mini excavator using CAT HYDO ADVANCED 10 HYDRAULIC OIL SAE 10W. Is you product safe to use with this hydraulic system? If a trace die is added to the system as well to assist in finding the leak, with this have any negative interaction with your product?

    Thanks

    • BlueDevil Pro on May 8, 2017 at 8:56 am

      Randy-

      Yes, you would be able to add the BlueDevil Hydraulic Stop Leak to the system you have described. The product 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

  37. Ken on May 29, 2017 at 9:26 am

    I have a slow leak that I have not been able to locate on my boat. It has a SeaStar hydraulic fluid steering system for inboard boats. I have two helms and an autopilot hooked up to the system. Can this product be safely used in this system and if so how much should I use? I am not sure how much fluid the entire system holds since I’ve never filled it completely.

    • BlueDevil Pro on May 31, 2017 at 8:22 am

      Ken-

      Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use on a SeaStar hydraulic fluid system. You will use one oz. of the product per quart of fluid in the system. You may want to contact the dealer for a capacity of the hydraulic fluid to properly treat the system.

      Thank you!

      -BDP

  38. Ray Whitehead on June 3, 2017 at 8:53 am

    Hi, I have a 50″ Bad Boy zero turn mower which has a small leak on the right side wheel unit. It appears to be leaking from a small inspection cap that is held on by two bolts. I don’t feel confident enough to remove the cap to see if it has a seal and what else might pop out as well the cap is removed. Would it be safe to use the Blue Devil Hydraulic Stop Leak in the hydraulic system? The system uses 20w 50 motor oil.

    • BlueDevil Pro on June 5, 2017 at 11:17 am

      Ray-

      Yes, the BlueDevil Hydraulic Stop Leak would be safe and compatible to use on your Bad Boy mower using 20W-50 motor oil. The product 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

  39. lea mayer on June 20, 2017 at 1:18 pm

    I have an Insuladome skylight very large.
    The piston/fluid has a leak. the skylight does not open or close. it is dead. Do you think your product Blue Devil would fix the leak? what about the piston. Point I am trying to make I want to open the skylight.

    • BlueDevil Pro on June 21, 2017 at 10:16 am

      Lea-

      Thank you for asking about your Insuladome skylight. In order to get the benefit of using the BlueDevil Hydraulic Stop Leak, the skylight would actually need to be able to operate. Replacing the piston may be your best option.

      Thank you!

      -BDP

  40. Purushotam Pyakurel on July 29, 2017 at 1:04 am

    Can I used this product in Hydraulic tank leaking of our 50ton hydraulic crane ?

    Thank you.
    Purushtoam Pyakurel

    • BlueDevil Pro on July 31, 2017 at 10:30 am

      Purushotam-

      Yes, you can use the BlueDevil Hydraulic Stop Leak in the hydraulic crane you have described. one gallon of the product would treat up to 20 gallons of fluid.

      Thank you!

      -BDP

  41. Dennis Fox on August 4, 2017 at 1:48 pm

    I have an ASV skid steer leaking hydraulic fluid from the main valve spool assembly at the output fitting. I have changed the fitting twice and still leaking. May be a hairline crack at fitting port on spool. Would Blue Devil possibly stop this?

    • BlueDevil Pro on August 4, 2017 at 3:28 pm

      Dennis-

      Thank you for asking about your ASV skid steer. The BlueDevil Hydraulic Stop Leak in only intended for rubber seals/gaskets in the hydraulic system. Based on your description, it is difficult to say exactly where the leak is coming from, however, the product does not harden or thicken in anyway, so it would not have any adverse affects on the system, regardless of where the leak is coming from. With the product, you should expect to see results after about 1-2 hours of operation.

      Hope this helps!

      -BDP

  42. mark harris on August 4, 2017 at 2:21 pm

    I have a dump trailer with a falcon pump and plastic reservior . the seal between the two seems to be leaking . the pump uses atf fluid. will it stop the leak?

    • BlueDevil Pro on August 7, 2017 at 12:32 pm

      Mark-

      Unfortunately our products are not designed to stop the type of leak you are dealing with.

      Thank you!

      -BDP

  43. Dan on August 22, 2017 at 6:30 pm

    I have a 318 John Deere garden tractor with a leaky hydraulic steering ram. The ram is welded, it can be cut apart, seals replaced and welded back together-this, because of the risk of damaging the new seals is crazy expensive! Will BlueDevil work for this type of ram?

    • BlueDevil Pro on August 23, 2017 at 8:31 am

      Dan-

      Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use on your 318 John Deere garden tractor. You should expect to see results after about 100-200 miles of driving.

      Thank you!

      -BDP

  44. Andrew Gysi on October 24, 2017 at 8:40 am

    I have a Gravely Promaster 300 mower with a hydraulic deck lift. I noticed the other day that there was some hydraulic fluid leaking from the cylinder. Does this product seal mower hydraulic cylinders from small leaks?

    Thanks!

    Drew

    • BlueDevil Pro on October 24, 2017 at 3:11 pm

      Andrew-

      Thank you for asking about your Gravely Promaster 300 mower. The BlueDevil Hydraulic Stop Leak is intended to restore dried, cracked, and shrunken rubber seals. If the leak is indeed coming from one of those seals, you would be a great candidate for the product.

      Thank you!

      -BDP

  45. Brandon on February 6, 2018 at 11:41 pm

    I have a case 450c bulldozer that is leaking around the rear end/transmission seals. Is this product safe to use with TCH transmission fluid that is required for the rear end/ transmission?

    • BlueDevil Pro on February 7, 2018 at 9:25 am

      Brandon-

      Yes, BlueDevil is compatible and safe to use with TCH transmission fluid. You will use one oz. 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

  46. Tony on May 23, 2018 at 8:58 pm

    They tell me the seals on the rack and pinion on my ’04 Dodge Caravan are leaking. Would Blue Devil help this condition?
    Thanks in advance,

    Tony Joy

    • BlueDevil Pro on May 24, 2018 at 8:42 am

      Tony-

      Thank you for asking about your Dodge Caravan. Based on your description, you would be a good candidate for the BlueDevil Power Steering Stop Leak (https://store.gobdp.com/power-steering-stop-leak-00232/). You will start by adding 1/3 of the bottle into your power steering reservoir, and should expect to see results after approximately 100-200 miles of driving.

      Thank you!

      -BDP

  47. Duane Lorack on June 29, 2018 at 10:56 pm

    Have a 580 case backhoe and has a cylinder leaking on the boom. Will this work in a case 580 hydraulic system.

    • BlueDevil Pro on July 2, 2018 at 9:08 am

      Duane-

      Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use in a case 580 hydraulic system. You will use one oz. of the product per quart of fluid in the system.

      Thank you!

      -BDP

  48. Roger Jones on August 14, 2018 at 9:57 pm

    Hello, I have a Class A motor home with hydraulic jacks. Camping World informed me that I have a leak and they want to replace the hoses going to the back Jacks. I told them not to work on the leak. When I got the coach back I look at the lines and there is a small leak at the valve connector. Can the BlueDevil Hydraulic Stop Leak be used to stop the leak at the valve for hydraulic jacks on an RV?

    • BlueDevil Pro on August 15, 2018 at 8:46 am

      Roger-

      Yes, the BlueDevil Hydraulic Stop Leak is safe and compatible to use on an RV. You will use one oz. 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

  49. George Tanner on August 22, 2018 at 11:20 am

    I have 2006 Range Rover sport with ACE anti-roll bars, the rear one is leaking fluid which i take its coming from a seal in the ram, the fluid i am using is Cold Climate PSF, will your Blue Devil stop my leak please.
    Thank you…

    • BlueDevil Pro on August 22, 2018 at 2:04 pm

      George-

      Thank you for asking about your Range Rover Sport. As long as the leak is not more than a seep or a light drip, you would be a good candidate for the BlueDevil Hydraulic Stop Leak. You should expect to see results after approximately 1-2 hours of operation.

      Thank you!

      -BDP

    • Wayne Cherrington on January 29, 2019 at 3:28 am

      Hi I have the same problem with my range rover sport did this fix your leak?
      Kind regards
      Wayne Cherrington.

      • BlueDevil Pro on January 29, 2019 at 9:32 am

        Wayne-

        Feel free to contact our technical support line at 888-863-0426 with any questions.

        Thank you!

        -BDP

  50. Roland scroggs on August 24, 2018 at 1:09 pm

    I have a 1970 Ford 3000 with a small hy d relic leak i put half gallon in pump witch is in diff. Stopped leak but now 3 point lift will not work

    • BlueDevil Pro on August 27, 2018 at 9:07 am

      Roland-

      Thank you for asking about your Ford 3000. Based on your description, we recommend draining the fluid completely and refilling it with your regular hydraulic fluid. Being that the leak has stopped, you should be good to go at this point.

      Thank you!

      -BDP

  51. Eddie on September 1, 2018 at 11:44 am

    Have a boat with Volvo pinta power sterring with leaking hydraulic ram at the seal. Recently replaced the seals. Lasted for about 6-8 hours. Now it drips at the piston ram seal when running. About a drip every 2-3seconds. I added a oz of your product. Does it have to run constantly to have the desired effect? Will the product with this?

    • BlueDevil Pro on September 4, 2018 at 11:44 am

      Eddie-

      It does not have to be a continuous run, however, you should expect to see results after approximately 1-2 hours of operation.

      Thank you!

      -BDP

  52. Marilyn on October 6, 2018 at 1:12 pm

    I have a B 7300 kubota it is leaking hydrostat fluid… dealer told me to only use kubota brand hydrostat oil in it… will this cause any problems by mixing them?

    • BlueDevil Pro on October 8, 2018 at 9:18 am

      Marilyn-

      The BlueDevil Hydraulic Stop Leak is safe and compatible to use on your B 7300 Kubota. The product does not harden or thicken in anyway, so it would not cause any adverse reactions. You will use one oz. of the product per quart of fluid in the system.

      Thank you!

      -BDP

  53. Dagmar Castillo on October 25, 2018 at 3:07 am

    Can your product help with a leaking slave cylinder on my truck? My hydraulic clutch is giving me a problem, and I gave to fill the reservoir daily.

    • BlueDevil Pro on October 25, 2018 at 8:57 am

      Dagmar-

      Unfortunately, we do not manufacture a product intended to treat a leaking slave cylinder. A hard part repair may be your best option.

      Thank you!

      -BDP