10 Reasons Your Hydraulic Jack Won’t Stay Up and How to Fix It

Nothing is worse than having your hydraulic jack won’t stay up—particularly when you realize you need one in an emergency.

This article takes a closer look at the most common jack problems, like hydraulic fluid leaks and air in the system.

It provides useful tips to keep your jack functioning at its best.

Learn these key elements to address issues early.

This training will help you properly maintain your equipment, allowing you to maximize your investment.

1. Low Hydraulic Fluid Level

A low hydraulic fluid level in your hydraulic car jack can lead to several performance problems.

Regular inspections of the hydraulic fluid reservoir are essential to ensure it maintains the proper level.

When the fluid is low, the jack cannot stay up, which can cause safety issues during use.

To prevent hydraulic car jack failures before they develop, look for signs of hydraulic fluid leakage, such as oily patches underneath the jack.

This could indicate that you’re due for some refills or hydraulic car jack repairs.

Using the correct hydraulic jack oil is crucial, as it significantly impacts the performance and longevity of your hydraulic car jacks.

A different or thinner oil may not withstand heavy use, so always adhere to the specifications provided.

Creating a checklist for hydraulic jack maintenance can make this process more practical.

Incorporate checking fluid levels into your pre-use inspection routine. This simple step will help you avoid unexpected surprises and enhance safety precautions.

2. Air in the Hydraulic System

Presence of air within the hydraulic system can create a “Rams Won’t Lift” condition.

This issue undermines your safe lifting capacity when moving heavy loads.

To regain proper lifting function, you’ll need to purge any trapped air.

Air typically gets in through vacuum leaks, such as through worn hoses or fittings, particularly in well-worn jacks or rugged working conditions.

Pumping the jack handle a dozen times with the release valve opened 1-2 turns will bleed the system pretty well.

Listening for any strange sounds while operating the machine can alert you to air in the system.

Ensuring the right level of hydraulic fluid after bleeding will help you avoid this problem again.

Metro Hydraulic Jack Company says that 70% of their customers have air-related issues.

Finding and repairing leaks, then bleeding the system will fix situations where the load won’t rise quickly or at all.

3. Worn Seals or Gaskets

Worn seals or gaskets are one of the major causes of hydraulic jack failures.

Checking seals and gaskets for wear is extremely important.

As these components wear out, hydraulic pressure decreases, potentially resulting in jack failure.

Check for fluid leakage around seals as an indication of impending seal failure.

Quality replacement parts are key for durability and functionality, helping to keep your hydraulic jack performing its best.

Common signs that indicate the need for seal replacement:

• Unusual noise during operation
• Fluid stains under the jack
• Inconsistent lifting performance

Up to 70% of hydraulic jack failures are due to worn seals or gaskets.

It’s very important to get these things in order NOW!

Additionally, worn seals or gaskets can lead to transmission fluid leaking.

They have the additional effect of working against the lifting capacity, reducing the ability of the jack to lift heavy loads.

Expert help from professionals such as SLSPRO can effectively fix these issues.

4. Faulty Release Valve

Additionally, a faulty release valve is usually to blame when your hydraulic jack won’t hold its position.

Testing the release valve before each use is essential to make sure the jack doesn’t lower suddenly.

If you discover yours not working as it should, take steps to repair or replace it to ensure the safety of your work.

How you access this component will differ by model, so consult your manufacturer’s directions.

The second most common failure of hydraulic jacks is air ingestion, usually from being run on their side.

To fix this, turn the jack upside down for several minutes.

This lets the trapped air bubble up to the top and escape when the valve opens.

This may take a few tries, as you may need to go back and forth.

Cheap hydraulic jacks only work vertically, but more expensive models such as KYB can be mounted in any position.

Make a record of all release valve malfunctions to assist in future diagnosis.

5. Overloaded Jack Capacity

So, after getting the right jack size, knowing the weight limits of your hydraulic jack is really important to avoid overload and failure.

Hydraulic jacks are mechanical devices that raise heavy loads by exerting pressure through liquids.

If you overload their capacity, you run the risk of bending or breaking the ram, which can get very costly.

Before lifting anything heavy, weigh the items to make sure they are within the jack’s capacity.

Learn what the max capacity is for each type of jack to determine which is best for you.

More than 70% of hydraulic jack failures result from improper maintenance.

Always monitor and maintain hydraulic fluid levels to ensure optimal performance and productivity of your equipment.

Follow these safe lifting practices:

• Never exceed the stated weight capacity.
• Use suitable oil replacements such as 10W or 20W motor oil.
• Inspect regularly for fluid levels and leaks.
• Operate on a flat, stable surface.

6. Damaged Hydraulic Cylinder

A damaged hydraulic cylinder will make your hydraulic jack less effective and maybe even dangerous.

Start by looking for any visible damage, such as dents or cracks.

These factors are often what throws a jack out of operation when having to lift heavy loads.

That function is really important features devices like your Michelin 3 1/2 ton trolley. By immediately replacing a damaged hydraulic cylinder, you can ensure safe lifting operations.

Look for leaking hydraulic fluid, which is a sure sign of internal damage.

Leaks undermine the pressurization required to run efficiently.

Keep clear documentation of all repair and replacement so you have a clear history of maintenance, important because up to 70% of failures are caused by lack of maintenance.

Components such as the Plug or the Spring need expertise to adjust, do NOT make arbitrary adjustments.

Hydraulic jacks rely on close tolerance Tank nuts for high integrity sealing.

These nuts can be stubborn to remove, so it’s important to identify whether you have a Threaded Nut or Internal C-clip.

7. Improper Use or Positioning

Improper use or positioning of a hydraulic jack can greatly affect its performance.

Always refer to your jack’s manufacturer’s instructions for proper use and to ensure jack is positioned firmly under your vehicle.

For instance, if the jack isn’t past the resting position by 4 or 5 inches, it might not pump properly.

Providing a stable, level ground surface is especially important because any slippage or instability underneath the ramp will create a “Rams Won’t Lift” problem.

Learning how to lift the right way with each object makes the lift safer and more efficient.

Providing a pre-lift checklist of dos and don’ts can serve as a useful guide prior to each lift.

When it comes to improper use or positioning, maintenance is key to avoiding these dangers.

In fact, over 70% of all these problems are due to improper use.

Using jack wheels that roll smoothly and consulting the manual for proper positioning and usage can help avoid dangerous accidents and costly damage.

8. Contaminated Hydraulic Fluid

To keep machines performing at peak levels, it’s important to address contaminated hydraulic car jacks promptly.

Regular checks for contamination or discoloration can help avoid accidents and ensure the hydraulic system remains functional.

For instance, replacing contaminated fluid is crucial in preventing hydraulic car jack failures.

A filter plays a vital role in keeping the hydraulic fluid free from debris, which could stall or seize the equipment.

Maintaining a documented maintenance schedule for hydraulic jack maintenance practices will ensure fluids are changed at the right intervals, enhancing equipment reliability.

If your hydraulic car jack employs a ball/seat overextension bar, flushing is an effective method to eliminate contaminants.

By running the jack out to full extension with the release closed, you can purge the valve system efficiently.

With no load, raise the jack to its maximum height and pump the handle approximately two dozen times to clear out contaminants.

Adding a bit of Lube Oil Supplement can significantly improve system operation.

9. Temperature Extremes Affecting Performance

Extreme temperatures – both high and low – are sure to affect the performance of a hydraulic jack.

Keep hydraulic fluid in a temperature-controlled space.

This stops it from thickening or thinning out, keeping it working at peak performance.

By staying aware of the jack’s performance in extreme heat or cold, and repeatedly modifying its intended use, you’ll keep your jack in peak condition for years to come.

Implementing hydraulic fluids in viscosity grades best suited to work in their unique temperature extremes is key to optimal performance.

For a quick reference, check out the table below comparing the effects of temperature on hydraulic fluid performance.

Temperature Condition	Effect on Hydraulic Fluid
High Heat	Fluid thins, potential leaks
Cold	Fluid thickens, reduced efficiency

Cavitation can occur with the 9% dissolved air in hydraulic oil. This reality illustrates the importance of operation and maintenance.

Conclusion

Doing so will keep your hydraulic jack in optimal condition, providing full functionality and reliable use for years to come.

A simple habit of routinely checking for fluid levels, air bubbles, and seal wear can avoid most problems before they even begin.

Be mindful to use the unit as intended and within load limits to prevent excess wear.

Temperature extremes can change the operation, so keep the jack in a uniform climate.

Keeping hydraulic fluid clean and adhering to a routine maintenance schedule go a long way in maximizing the jack’s lifespan.

Frequently Asked Questions

Why won’t my hydraulic jack stay raised?

Most commonly, low hydraulic fluid or air in the hydraulic circuit is the culprit. Look for leaks and top off the hydraulic fluid using a reliable hydraulic car jack. Simple routine hydraulic jack maintenance could help avoid these common issues.

How can I check for air in my hydraulic system?

First, listen for any signs of hissing and then check for any spongy or inconsistent operation of your hydraulic car jack.

To ensure efficient car jack function, bleed the system to remove any trapped air, which aids in hydraulic jack maintenance.

What should I do if my jack leaks fluid?

Leakage in hydraulic car jacks often indicates that seals or gaskets are worn and need replacement.

Regular maintenance practices and routine inspections can help identify these common issues before they become critical, ensuring optimal jack performance.

Is it safe to use a hydraulic jack in extreme temperatures?

Hydraulic fluid viscosity can be affected by extreme heat or cold, which may lead to hydraulic car jack failures. To ensure your car jack remains safe and functional, inspect the fluid level before use.

Can overloading damage my hydraulic jack?

Exceeding the jack’s capacity can lead to hydraulic car jack failures, as it overworks the parts. To ensure safe use, always adhere to the weight limits specified by the manufacturer.

How often should I perform maintenance on my hydraulic jack?

Consider routine hydraulic jack maintenance every six months. Make it a habit to check the fluid levels, look underneath for leaks, and lubricate all moving parts.

These helpful maintenance tips will go a long way in preventing common issues and extending the service life of the hydraulic car jack.

What is the impact of contaminated hydraulic fluid?

Dirty fluid can lead to clogs and excessive wear in hydraulic car jacks, decreasing jack efficiency. Regular hydraulic jack maintenance and inspection of your fluid ensure your car jack continues working effectively and lasts for years.