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Hydraulic Jacks

Hydraulic Jacks: The Ultimate FAQ Guide

I know you would like to import hydraulic jack from China.

Or, you just want to learn more about hydraulic jacks.

In this guide, you will find all information you’re looking for about hydraulic jacks – keep reading if you want to be an expert in these lifting systems.

What are Hydraulic Jacks?

Hydraulic jacks are mechanical devices that you will use to apply great force in a bid to lift heavier loads.

They are important lifting equipment.

Figure 1 Hydraulic jacks

What are the Advantages of Hydraulic Jack?

Hydraulic jacks are very important in the manufacturing industry to apply impressive force for various advantages.

Some of the benefits of using the hydraulic jack include:

· Different Types of Designs

Hydraulic jacks are available in a wide variety of designs that you can choose from for different applications.

Some of the types of hydraulic jacks include the bottle jack and the floor jack.

· Smooth Pressing

Hydraulic jacks often produce even and smooth pressure throughout the stroke of a ram.

This enables you to lift very heavy loads with the application of very little pressure.

· Proper Pressure Control

Modern hydraulic jacks come complete with a digital platform and pressure relief valves for eliminating pressure.

· Simple Designs

Hydraulic jacks have a very simple design that you can understand and operate with lots of ease.

Due to the fact that the hydraulic jack has minimal moving parts, the cost of maintenance is also low.

· Proper Adaptability

You can use the hydraulic jack in different applications such as traversing work heads, nose pieces and pressure controls.

You can also customize the hydraulic jack to suit your personal applications in different fields.

· Minimal Cost of Operation

You do not have to attend a special school for training on how to use the hydraulic jack.

All you have to do is purchase the hydraulic jack and do frequent maintenance for high durability levels.

How Does a Mechanical Jack Compare to a Hydraulic Jack?

Figure 2 Mechanical jack

Mechanical jacks often employ mechanical pressure to allow you to lift a heavy device through manual force.

There are two types of mechanical jacks which include house jack and scissor jack.

On the other hand, the hydraulic jacks use incompressible fluids to apply greater force for lifting heavier devices.

Some of the types of hydraulic jacks that you can choose from are the floor jack and the bottle jack.

What are the Most Common Types of Hydraulic Jacks?

The most common types of hydraulic jacks that you can choose from are the floor jack and the bottle jack.

3Ton Crocodile Jack

Figure 3 Floor jack

Figure 4 Bottle jack

How Does a Pneumatic Jack Compare to a Hydraulic Jack?

Hydraulic jacks depend on incompressible fluids such as oil to help in lifting heavier loads off the ground.

On the other hand, the pneumatic jack depends on air pressure to assist in lifting heavy loads off the ground.

There are two types of pneumatic jacks which include inflatable jack and the air hydraulic jack.

Figure 5 Pneumatic jack

What is the Difference Between a Floor  Jack and a Bottle  Jack?

Here is a direct comparison between the floor hydraulic jack and the bottle jack.

· Floor  Jack

You can also identify a floor hydraulic jack as a trolley jack.

It has a horizontal piston that pushes the bell crank and a longer arm providing motion to the lifting pad.

Floor jacks come complete with wheels and castors which allows for proper compensation of the arc on the lifting pad.

It is most suitable for car enthusiasts and professionals as it is easier and quicker to use.

They also have very high stability levels with wheels on every angle.

· Bottle  Jack

Bottle jacks gets its name due to the close resemblance it has to the shape of a bottle.

It has a hydraulic pump on the base plate that provides hydraulic pressure capable of lifting the ram.

The ram will, therefore, lift heavier loads such as a car from the ground.

Bottle hydraulic jacks are compact and easy to carry making it most suitable for personal use.

They have no wheels, and are not easy to use due to the low levels of stability.

How Many Types of Trolley  Jacks are There?

You can choose from the different types of trolley or floor hydraulic jacks.

There are six different types of floor or trolley jacks which include:

i. Extra Low Trolley Jacks

You will use this type of floor hydraulic jack on vehicles that have very low levels of clearance and low chassis.

ii. High Lift Trolley Jacks

You will use the high lift trolley jacks to life vehicles that have a higher chassis such as 4 by 4 cars.

iii. Scissor Jacks

It has a scissor mechanism that winds a central bar in and out to lower or raise a load such as a vehicle.

iv. 3 Ton Extra Large Trolley Jacks

It has steel hardened saddle with a 3-ton load capacity capable of lifting loads with higher chassis.

v. 5 Ton Trolley Jack

It is a strong and stable trolley jack with the extended body, a 5-ton lifting capacity and a lower lifting range

vi. 10 Ton Long Body Trolley Jack

This type of trolley jack is capable of lifting heavier loads of 10 tons and can also lift a car up to 570 mm.

What are the Parts of Hydraulic Jack?

A hydraulic jack consists of six main parts that enable it to function accordingly.

The main parts of the hydraulic jacks are:

· Reservoir

The hydraulic jack has a reservoir that will hold the hydraulic fluid for controlling the pressure.

· Pump

The pump is responsible for pulling the fluid from the reservoir towards the check valve.

· Check Valve

The check valve will direct the pressurized fluid all the way to the cylinder of the hydraulic jack.

· Main Cylinder

The cylinder acts as the housing for the ram piston thus keeping it safe and secure from the external environmental effects.

It also maintains absolute pressure within the system and allows no leakages.

· Ram Piston

The ram piston is responsible for lifting the load from the ground with the help of pressure within the cylinders.

· Release Valves

The release valve acts as the main outlet for pressure thus allowing the ram piston to assume the original position.

How Does a Hydraulic Jack Work?

The hydraulic jack depends on the pascals principle to operate efficiently.

Implying that, the pressure within the closed container of the hydraulic jack system is the same.

In a hydraulic jack, there are two main cylinders of different sizes that are connected as one.

Apart from that, there is a pump and a pump plunger for exerting the pressure.

First, you will draw back the pump plunger to open the suction valve thus drawing oil to the chamber of the pump.

When you apply force on the plunger it will create enough pressure on the to the fluid (oil).

The oil will flow through the discharge valve and then into the smaller cylinder chamber.

As soon as the fluid is in the cylinder chamber, the discharge valve will close thus building pressure in the chamber.

Within the cylinder chamber, it will exert pressure against the surface and through the fluid.

Since you will be applying force on the smaller side, it will reciprocate the same force towards the larger side.

As it reaches the larger side, it will produce a greater force that is capable of lifting a greater load.

For instance, when you use one square inch piston to apply a pound of pressure on the hydraulic fluid.

It means that the pressure you apply on the fluid will be similar to one square inch pound.

In case you connect a ten square inch piston on the system, it will produce ten times the amount of force.

Which Properties of Hydraulic Jack Fluid Should You Consider?

When choosing a hydraulic fluid, there are particular properties that you should consider in the fluid.

The properties of the hydraulic jack fluid to take note of include:

· Viscosity of the Hydraulic Fluid

You must purchase hydraulic fluid with a viscosity range of 22 cSt to 32 cSt at 40 degrees centigrade.

It must maintain this particular viscosity range to produce the right lift on the load.

· Thermal Stability of the Hydraulic Fluid

Since the hydraulic jacks’ work at varying temperatures, the hydraulic fluid must maintain a particular temperature stability.

Implying that the fluids must maintain its properties even when working in varying temperature conditions.

Non-Corrosive Hydraulic Fluid

Most of the hydraulic systems often have metal surfaces that are prone to rust in the right conditions.

You must use a hydraulic fluid that will not corrode the parts of the hydraulic jack system.

· Filterability of the Hydraulic Fluid

To avoid blocking the system, you must use a hydraulic fluid that you can easily filter and remove debris.

It has to be very clean and filterable as it flows through the hydraulic system of the hydraulic jack.

Can You Use ATF instead of Hydraulic Fluid on a Hydraulic Jack?

Absolutely, you can use Automatic Transmission Fluid as a hydraulic fluid in a hydraulic jack.

It has all the properties of the hydraulic fluid that you desire and will last even longer without need to change.

You must, however, note that ATF will cost you more than the normal hydraulic fluid.

What is the Implication of Mixing Different Types of Hydraulic Jack Fluids?

You should avoid mixing different types of hydraulic fluids as that would compromise on the additive performance of the fluid.

Apart from that, you might also compromise on the corrosion properties of the fluid thus corroding the system.

In addition to that, mixing different hydraulic fluids would contribute to an increase in mechanical wear.

How Long Should You Take Before Servicing the Hydraulic Jack?

Hydraulic fluids act as the blood of the hydraulic jacks and must be in the right condition.

You must always keep the fluid purity and levels at acceptable ranges to avoid spoiling the machine.

For that reason, you have to check and confirm the condition of the hydraulic fluid after every 100 hours.

Apart from that, you should make a point of replacing the hydraulic fluid after every 1000 hours of service.

What are the Safety Precautions when using Hydraulic Jack?

When using the hydraulic jack, there are particular safety measures that you have to consider.

Here are the main safety standards that you must take care of.

1. Wear Personal Protective Equipment

You  wear gloves for your hands, goggles for your eyes and protective clothing to cover your body.

2. Support the Hydraulic Jack

You must also support the hydraulic ram or jack on a non-sliding, firm and solid foundation that can support the load.

3. Read the Instructions

You must also read the instructions of using the hydraulic jack very carefully and follow them keenly.

4. Fill Oil Reservoirs

When filling the oil reservoirs, you must ensure that you retract the cylinder and then reach the level recommended.

5. Center Your Load

You must also have the load at the central point of the hydraulic jack or ram for equal distribution.

If not, you can use more hydraulic jacks to ensure that the load you are lifting is uniformly distributed.

How do you Maintain Hydraulic Jack?

You will maintain the hydraulic jack by ensuring that you clean it on a regular basis.

Apart from that, you must conduct regular inspections on the hydraulic jacks to ensure it works well.

On the same note, you will ensure that the hydraulic fluid levels are right through regular inspection.

If not, you must fill the hydraulic fluid to the recommended levels on a regular basis.

In addition to that, you will change the hydraulic oil after every 1000 hours of operation.

What’s more, you must ensure that you lubricate all the moving parts of the hydraulic jacks.

Which Factors Affect the Efficiency of Hydraulic Jack Transmission?

The main factors that affect the hydraulic jack transmission include:

· Viscosity of the Hydraulic Fluid

The hydraulic fluid must maintain a particular viscosity range in order to function efficiently.

In case the viscosity goes below or beyond the usual level, then the efficiency of the system will drop.

· Contaminants in the Fluid

Contaminants in the fluid may damage the hydraulic jack cylinders or block the entire system thus reducing efficiency levels.

What are the Main Design Objectives in the Assembly of the Hydraulic Jack?

During the designing process of the hydraulic jack, you must have the following in mind.

  • Ensure that the hydraulic jack design has sufficient strength marching the applications.
  • Ensure that the design is simple and can be produced easily in masses

How Do You Troubleshoot a Hydraulic Jack?

You are likely to experience some hitches while using hydraulic jacks.

You will identify the hitches through troubleshooting applications.

Some of the hitches you might come across include:

· Tip Over

The hydraulic jack might tip over due to improper placement of the jack under the load.

Make sure that you place the hydraulic jack well and anchor it with a base that can support the load.

· Hydraulic Fluid Leaks

The hydraulic fluid might also leak from the reservoir due to loss of ends on the valves.

Make sure that you replace the valves early enough when they show signs of weakness.

· Bends on the Hydraulic Jack

The hydraulic jack will bend due to very heavy loads that it cannot withstand or carry.

You can sort this out by loading the hydraulic jack with the right load that it can support comfortably.

How Much Does a Hydraulic Jack Cost?

The cost of the hydraulic jack will depend on the type of hydraulic jack you intend to purchase.

The higher the quality of the hydraulic jack, the higher the price you will pay.

Generally, the cost of hydraulic jacks will range between 48 to 850 US dollars.

How Can You Reduce Environmental Pollution Using the Hydraulic Jacks?

In the hydraulic jack, the main source of pollution is the use of the hydraulic fluid which emits greenhouse gases.

For that reason, it is extremely important to ensure that you get rid of or dispose of the hydraulic fluids well.

Apart from that, you can also recycle the hydraulic fluid thus ensuring that you do not pollute the environment.

What are the Main Applications of the Hydraulic Jack?

Hydraulic jacks are very useful in quite a number of applications to lift heavy loads over longer distances.

Some of the industries where you will use the hydraulic fluid include:

50Ton Bottle Jack

Figure 8 Hydraulic jack

· Construction Industry

You will need the hydraulic jack to help you lift construction materials to different floor of the building.

· Industrial Applications

Different industries especially manufacturing industries use the hydraulic jack to move load from one place to another.

· Automotive Industry

You will need the hydraulic jack in the automotive industry to lift a vehicle when changing the tires.

In addition to that, the hydraulic jacks will lift the vehicle thus exposing the bottom for repairs and maintenance.

Which Precautions Should You Take in Case You Mix Different Types of Oils in Hydraulic Jacks?

You might, accidentally, mix different types of hydraulic fluids in the hydraulic jack system.

Well, in case of this type of accident, here are the precautions that you must take care of:

  • You must check for signs of poor demulsibility, foaming or even sludge on the hydraulic oil.
  • In addition to that, you must increase the frequency with which you analyze the oil.

In this case, you will be checking for corrosion, degradation of the lubricant, and abnormal wear.

  • You must also change by flushing the oil very fast leaving about 5 to 40% of the oil in the system.
  • You must continue with frequent analysis and inspection of oil to ensure that hydraulic oil is stable.

What are the Limitations of Using the Hydraulic Jack?

Unfortunately, the hydraulic jack also has some limitations which include:

  • Handling of the hydraulic fluids can mess up the environment as well as your clothes in a spill.
  • You are likely to experience leakages of the hydraulic fluid thus affecting the whole system.
  • Hydraulic fluids are flammable and can cause serious burns in case of a fire.
  • The speed of operation of the hydraulic jack is usually very low
  • Hydraulic jacks also relatively consume a lot of energy.

What is Hydraulic Jack used for?

The main use of the hydraulic jack is to lift objects that you cannot lift alone very easily.

In addition to that, you can use it for the following functions.

  • Drawing and pushing of rods
  • Bending different types of substances especially metals through the press force.

Which Material is Hydraulic Jack Made of?

The main materials that you will use to make hydraulic jack is stainless steel material.

Stainless steel has very high tensile strength and will not succumb to excess weight easily.

There are other non-steel parts that include plastic or rubber for the valves which you can mold or purchase.

Can Hydraulic Jacks be used on their Sides?

Yes, you can operate the hydraulic jack while lying on the sides up to a particular point.

Most hydraulic jacks have ports on the lower bottom parts for the intake of air to the pump.

You can, therefore, operate the hydraulic jacks on its sides until you expose the port to the reservoir air.

Can Hydraulic Jack Work Horizontally?

Yes, there are applications that will force you to use the hydraulic jack horizontally.

You must, however, note that the only hydraulic jack for horizontal applications is the bottle hydraulic jack.

In this case, you will have to ensure that the pump is lower than the piston of the hydraulic jack.

Who Invented Hydraulic Jack?

William Joseph Curtis is the man responsible for inventing the hydraulic jack and patented it in 1838.

After that, Richard Dudgeon came up with an improvement of the hydraulic jack thus making the hydraulic press.

Is there a different between Hydraulic Jack and Transmission Jack?

1Ton Low Lift Transmission Jack

Figure 9 Transmission jack

Yes, there is a difference between the hydraulic jack and the transmission jack.

You will use both the transmission jack and the hydraulic jack to lift heavy loads.

The transmission jack uses air as the main fluid while the hydraulic jack uses liquid as the main fluid.

Apart from that, you will use the transmission jack to work on the transmission of your car.

On the other hand, the hydraulic jack is the best tool for lifting vehicles for different purposes such as changing tires.

What Causes Cylinder Failure in Hydraulic Jack?

There are quite a number of setbacks that you can experience while using the hydraulic jack.

Among the setbacks that might consume your time include cylinder failure requiring servicing or replacements.

Some of the most common mechanisms leading to failure of the cylinder include:

· Contamination of Hydraulic Fluid

The hydraulic fluid can damage or score the hydraulic cylinder is it has contaminated particulates.

Apart from that, the contamination of the fluid can lead to hydraulic seal deterioration.

· Seal Leakage

There might also be a leak in the seal which leads to loss of pressure within the cylinder.

It will lead to an effect on the lifting capacity of the jack and can worsen if you don’t replace the seals on time.

· Side Loading Impacts

Here, the vector force of applying the load may have components that are not parallel to the cylinder axis.

· Poor Pressure Maintenance

In case you forget to maintain proper pressure within the cylinder, you might experience exacerbated leakage of fluids from seals.

· Poor Maintenance

This is a case where you may fail to perform regular inspection and general maintenance on the hydraulic cylinder.

This will lead to a reduction in the life of service as well as cylinder failure.

What are the Important Hydraulic Jack Specification?

When you are purchasing the hydraulic jack, there are particular specifications that you must look at.

Here are the main specifications that you must pay close attention to.

· Size of Load

Well, different hydraulic jacks have the capability of lifting different sizes of loads.

Depending on your application, you will choose the hydraulic jack which matches the application requirements.

· Mechanism of Force Application

You will also decide on the mechanism with which the hydraulic press applies force to help in lifting the load.

Here, you will choose between the hydraulic, mechanical or pneumatic type of jacks.

· Type of Materials

In this case, the type of material that you choose will determine the durability of the hydraulic jack.

For instance, stainless steel hydraulic jacks are stronger and capable of carrying heavier loads without breaking.

Apart from that, you must also consider the type of fluid to use in the hydraulic jack.

How can you Test Hydraulic Jacks?

You can test they hydraulic jack using the static test or the dynamic test.

The static test is, usually, not the best testing technique because it does not detect damages on the hydraulic jack.

In that case, the best testing method for hydraulic jacks is the dynamic test.

During the testing period, you will pressurize the cylinder over the whole stroke on the same cylinder.

As that happen, you will make sure that you test every part of the cylinder stroke.

With this test, you will be capable of detecting all the scratches and damages on the cylinder of the hydraulic jack.

What is Pascal’s Law?

Pascal’s law is the principle of fluid pressure transmission.

It states that change in pressure at any particular point of a liquid will lead to significant change throughout the liquid.

In an enclosure, change in fluid pressure at one-point equals change in pressure throughout every point of the fluid.

As you can see, there are a range of aspects to consider when choosing hydraulic jacks.

In case you have any questions or inquiries, Passca Tools team is here to help – contact us now

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