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How to Repair a Floor Jack That Won’t Hold Pressure: 6 Easy Steps

Are you wondering how to repair a floor jack that won’t hold pressure? We are to help and provide a simple process that will ensure the floor jack works effectively and can lift a vehicle conveniently.

We are aware it can be tricky to achieve this. In this post, we will take you into detail about how to achieve this, and all information is factual and correctly researched.

By following all insights provided in this blog post, you can never go wrong when it comes to repairing a faulty floor jack.

We are the best in what to do and proud of creating top-notch content like this.

First, we will take you into the insights about a floor jack and then proceed to give your ideas on how you can repair one.

A floor jack that cant hold pressure can affect your usual car operations, particularly when it comes to lifting cars.

Shun away from the mediocre blog posts that lack content and are not correct.

By following these below insights about repairing a floor jack that can’t hold pressure, you are way above other drivers.

How to Repair a Floor Jack that won’t Hold Pressure

Fixing a floor jack that doesn’t hold pressure is not cumbersome. Here are steps on how you can achieve this comfortably.

Step 1: Start by Cleaning it Thoroughly

If you have a flawed floor jack, cleaning it thoroughly is a must. Making a thorough cleaning ensures that all debris and impurities are eliminated.

Avoid affecting the fixation process by first making sure that all dirty stuff is eliminated from the floor jack that can’t hold pressure.

To achieve this, use a brittle affiliated brush and a suitable metal cleanser.

Focus on eliminating as much debris as possible so that the floor jack can work much easier than before. Cleaning with the type of brush will ensure you get the best results.

In most scenarios, debris and dirt affect how these machines work. By cleaning these machines, you can never go wrong, and it takes little effort to achieve this.

Step 2: Uninstall the Cylinder Plug

Since you have already cleaned the floor jack, it’s high time you test the cylinder plug. Importantly, you need to look for the cylinder plug, and it’s made of black rubber, which is recognizable.

Usually, it is situated at the top of the cylinder and ensures that the fluid is pushed conveniently. Once you have detected it, ensure that it is not broken or loose.

If you find any flaw in it, you can use a screwdriver to remove it conveniently. All in all, this is not cumbersome and should be achievable with a slight pull.

Step 3: Remove and Change the Fluid

By now, you have already removed the cylinder plug and installed it back. You should now be ready to test the jack to ensure it’s good.

If it is flawed and refuses to function effectively, it’s high time you replace the fluid.

Importantly, ensure that the floor jack fluid is not contaminated by debris and other dirty stuff. Debris found in the fluid compartment can make the liquid fail to work to the best level.

Also, you can fill a floor jack with too much or less fluid, which will always make it not work at the best level.

Different users of hydraulic jacks have different ways, but it’s best to halfway the jack with the fluid.

All in all, it’s robust to completely drain the cylinder. To achieve this, start by plugging out and then place the floor jack in an upside-down position on the top side of a bucket.

Ensure the fluid content is fully emptied. Also, you can add more fluid and fill the floor jack.

If, for example, the fluid has dirt aspects, you should change it completely. Add enough fluid to the floor jack so that it can start to work correctly.

Step 4: Scrutinize the Floor Jack Rubber Plug

Install the rubber plug, and in case it’s damaged, replace it with a new one. Having a damaged plugin, the jack will always cause problems.

A good thing is the fact that a rubber plug isn’t expensive.

Before embarking on installing a rubber plug, ensuring that it’s clean, proceed to put it in the correct hole and then install it firmly. A new rubber plug should fit correctly in the hole.

Test the floor jack again and if it doesn’t work, check the release valve to know if there are problems.

Step 5: Check the Release Valve for Potential Flaws

If you have already followed all the above-mentioned steps and the floor jack doesn’t work, it’s high time you look for other problems that could be affecting the floor jack.

One thing prevalent is the fact that the release valve could be releasing excess pressure when it comes to lifting.

Excess pressure could be a result of excess fluid on the floor jack, and it releases unnecessary pressure. Also, the release valve could be damaged.

All in all, it’s wise to remove it and check if there are any prevalent problems. If it’s damaged, consider replacing it or proceed to put it back. A loose valve could lead to pressure leakages.

By first removing the release valve and installing it back, you can handle the tightening flaw prevalent.

You can fix this flaw promptly but remember it may not work as you like. If it fails, there is an issue prevalent with air, and it requires further checking.

Step 6: Proceed to Bleed the Floor Jack

After the floor, jack fluid has been emptied and the black rubber plug has been changed, there could be some air that is affecting the floor jack. Air issues can cause problems regarding pressure.

To handle this situation, you only need to bleed the floor jack.

A process that needs to retract the floor jack release valve and then proceed to pump the handle a couple of times. Any air that could be affecting the floor jack will be released completely.

After doing so, you can install the release valve back to the former place and check if it will work well. Consider screwing the handle and the pump.

Step 7: Test the Floor Jack

Before proceeding to lift any vehicle after you have followed all the above-mentioned procedures, it’s crucial you test the jack first.

The good thing is to lift the floor jack arm and then get it down a couple of times.

By doing so, you should check if there are any flaws prevalent. If there are no flaws, it’s high time you test it with a car.

Start by lifting a vehicle some little inches upward to check if the jack can hold.

Proceed by going slowly upside and check if there are any losses regarding pressure. Leave the jack to do this for around five minutes

. If you find there are no problems with the floor jack, then it’s already good to start work.

Different Types of Floor Jack: the Floor Jack Variations

Emergencies are prevalent, and modern floor jacks are important helpful tools when it comes to lifting a car. Here are some notable types of floor jack:

1. The Mechanical Type of Floor Jack: A floor jack that uses mechanical mode to deliver pressure and consequently lift the vehicle upwards.

All it requires is some physical exertion to lift the jack.

Also, some types of mechanical floor jacks use electricity to lift the jack and, consequently, the car. A mechanical floor jack is limited when it comes to a height; it can raise a vehicle.

Ideal for small works, like when changing tires. Most recognized car manufacturers provide the mechanical car jack when selling.

2. Piston Type of Floor Jack: It supports much weight and is ideal for lifting a heavy-duty-based vehicle. Not ideal for vehicles that are too low since they don’t support low heights.

Importantly, it’s not ideal for use in sports cars and is suitable for trucks and much bigger cars. By functionality, it uses hydraulic mode to lift heavy-duty cars.

3. Hydraulic Type of Floor Jack: A floor jack that uses the hydraulic mode to lift vehicles. By design, it comprises diverse cylinders where fluid alternates.

When functioning, it creates pressure and uplifts the saddle by releasing the closed valve.

By doing so, it lifts the vehicle for much-needed repairs. Hydraulic-based floor jacks usually settle on four wheels, thus giving advanced balance when uplifting a car.

Importantly, it’s the type of floor jack that handles extreme car weights and is suitable for heavy-duty works.

Different Crucial Parts of Floor Jack

Floor jacks have at least six parts. All these parts are crucial for the proper functioning of the floor jack. Without them, a floor jack will not function effectively.

Here are the basic parts of a floor jack:

  • Reservoir Part: The reservoir part of the floor jack is concerned with the important task of holding hydraulic fluid.
  • Floor Jack Pump: The floor jack pump is concerned with pulling the fluid from the reservoir part to the valve.
  • Floor Jack Valve: The floor jack valve is tasked with taking the already pressurized fluid to the main cylinder.
  • Floor Jack Main Cylinder: A floor jack main cylinder component usually is concerned with housing the ram piston.
  • Floor Jack Ram Piston: Ram piston usually makes the already pressurized fluid go out.
  • Floor Jack Release Valve: The floor jack release pump is tasked with allowing the floor jack to let out pressure and also makes sure the ram piston can retract conveniently.

A Floor Jack that won’t Hold Pressure: What does it Mean?

A floor jack that can’t hold pressure is a damaged one and requires to be repaired. One thing about this flawed floor jack is that it can’t lift cars as it should conveniently be done.

Oil levels could be lower or higher than the suited measure and consequently lead to floor jack problems.

By functionality, a floor jack that can’t hold pressure will have a less lifting level, and also, the lowering capacity can’t be the best.

A floor jack that won’t hold pressure will affect your travel since cars can have punctures at any time.

Importantly, it’s robust to repair one, and we will take you into detail on how you can achieve it. A simple yet useful procedure that you can handle conveniently.

If there are problems when it comes to handling the repair of a floor jack that can’t hold pressure, it’s wise to hire a professional mechanic.

Hiring a professional mechanic will cost you some monetary sums, but it’s a worthy venture to get it to work well.

Hydraulic Floor Jack Repair Instructions: Step by Step Process

Here are some instructions concerning repairing a floor jack that can’t hold pressure.

Start by Cleaning the Device

Start by cleaning the floor jack. Dirt and debris can get on the hydraulic fluid, and they can damage inside components of cylinders.

Shop rags are ideal for wiping the cylinders before opening them.

Un-install Plug from the Cylinder

When floor jacks flaw, mostly it’s due to a failure occurring from the plug area or dirt affecting hydraulic fluid. All these elements harm most of these jacks, and people fail to recognize them.

Importantly, check the rubber plug located on the cylinder top and continue to use a screwdriver to pry it up. If you confirm the plug is flawed, you need to replace it.

Embark to Drain the Hydraulic Fluid

Use a bucket and set it on the underside of the floor jack and embark on turning it so that the fluid can be drained.

When the cylinder is drained, ensure that no debris is left, and extra cleaning is important if they are.

If you find some, use an air compressor to blow it out. A good tool to use is a bristle brush since it has immense capacity to remove dirt.

Change the Fluid

After confirming the cylinder is clean, pour quality and new fluid by using a funnel. The content of fluid poured will vary with the type and size of the floor jack.

Make sure the floor jack is filled, and a good option of fluid is the motor-based 5W-30, which can be used as a substitute.

Ensure you replace it with the correct fluid to get the best results.

Change the Floor Jack Rubber Plug

Ensure you check an old or new rubber plug before installing it back. Use a rag to clean and remove all dirt. Continue to set the hole in the cylinder and press it.

Importantly, the floor jack plug needs to be flatly seated, and there should be no wrinkle that can lead to leakage of air in the cylinders.

Do a Testing

Once you have changed the fluid, there should be no problem. Test the hydraulic floor jack several times before submitting to weight.

To make sure the pressure holds, lift the arm at different times.

Continue by placing the jack under the car and embark on lifting. Ensure the pressure can hold weight before using it.

If it holds well, then your jack is led to work effectively and at the best level.


By now, you have that “how to repair a floor jack that won’t hold pressure”. A simple task that is doable by following all the above-mentioned procedures.

Floor jacks can flaw anytime, and it’s crucial to get information that will make your life much easy when it comes to emergencies.

Emergencies are prevalent with cars, and it’s better to get prepared by having insights on how to handle a faulty flow jack that can’t hold pressure.

We are the best when it comes to advising car owners.

If you come across any helpful information about repairing a faulty car jack that can’t pressure, please include it in the review section.

We got you all along, and you can 100% trust this blog post.

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