Your Reliable Supplier Of Excavator Hydraulic Cylinder In China

Xugong KS is Here To Provide You A Top Quality Excavator Hydraulic Cylinder Replacement.

  • Compatible for excavators like Komatsu, Hitachi, Cat, Volvo, Daewoo, Hyundai, JCB, and so on
  • Available for excavator  Arm/Boom/Bucket hydraulic cylinders, and related parts
  • Low price, High quality, Fast delivery
  • Strong wooden package
  • Lifetime quality warranty
  • Available stock of 1000+ pcs of excavator hydraulic cylinders and ready to ship

XuGong KS Excavator Hydraulic Cylinder Quality Certification

  • ISO9001
  • KS CE
  • SGS
  • ISO 9001

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Needed Top Quality Excavator Hydraulic Cylinder? XuGong KS will Give You That.

Xugong KS is offering excavator hydraulic cylinders in a wide range of models. We carry aftermarket excavator hydraulic cylinders such as Komatsu, Hitachi, Cat, Volvo, Daewoo, Hyundai, JCB, and so on.

All of our excavator hydraulic cylinders include excavator arm cylinder, excavator boom cylinder, excavator bucket cylinders. Xugong KS also supplies related hydraulic cylinder parts, for example, an excavator hydraulic seal kit, hydraulic piston rod, sliding rings, cylinder barrel, and so on.

Get your top-quality excavator hydraulic cylinder now at Xugong KS, we will not disappoint you!


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XuGong KS Excavator Hydraulic Cylinder Factory Overview

Excavator hydraulic cylinder goes bad? Where to find the best replacement?


Excavator Hydraulic cylinder has many applications for different excavators. It is the power unit of an engine. A high-quality excavator hydraulic cylinder made of the best metal products, when properly maintained should last very long. Due to deterioration of seals excavator hydraulic cylinder may fail. If you start hearing alarming banging noises, the actuator starts to slow down, the cylinder starts getting way too hot and your power bill goes up. It gives you a warning that your excavator hydraulic cylinder is on its way out.

Learning to recognize these signs will help you treat the problems before it becomes an excavator breakdown. That way you can conduct plans like excavator hydraulic cylinder repair, finding brand new, OEM, or aftermarket excavator hydraulic cylinders. The good news is; Xugong KS has all of that. If you need parts for your excavator hydraulic cylinder repair such as seals, barrels, etc. you can freely select those here at Xugong KS with your specific parts number and we will be happy to assist you.

Our brand new excavator hydraulic cylinders are made of high-strength steel materials assuring you of long service life. Our OEM excavator hydraulic cylinders are 100% made accordingly and if you need quality with the same function aftermarket excavator hydraulic cylinder replacement. We can cover you. Gets it now at Xugong KS.

Excavator Hydraulic Cylinder-The Complete FAQ Guide


An Excavator hydraulic cylinder FAQ Guide helps answer some of the most common questions that excavator owners may have regarding their hydraulic cylinders.

This hydraulic cylinder FAQ guide compilation of basic frequently asked questions and answers about Excavator hydraulic cylinders about the life of excavator hydraulic cylinders, maintenance requirement, cost, types of excavator hydraulic cylinder, and much more.

This guide will help you with every kind of information you are striving to know about Excavator Hydraulic Cylinders.


1.    How long does the excavator hydraulic cylinder last?


The life cycle of an excavator hydraulic cylinder depends on many factors, including the several performances related to its use.

      Hydraulic Cylinder

Excavator hydraulic cylinder can work continuously for five to fifteen years with proper and diligent maintenance. Still, it can also be as short as a few years if you are not careful when using it or neglecting it altogether.


Excavator hydraulic cylinder can bear more than two and a half million cyclic loads per year.

A worn-out piston in an older machine is more likely to leak. The probability of a leak increases with age, so it is more likely that a machine will need to be serviced.


2.    How do I know if my Excavator hydraulic cylinder is bad?


Several symptoms can reflect that your excavator hydraulic cylinder is not good. Some of these symptoms are listed below that you must take care of:

  • You suddenly hear loud noises coming from inside of your excavator hydraulic cylinder
  • The piston inside of your Excavator hydraulic cylinder is shaking.
  • Your power requirement has increased
  • The speed of the actuator appears to be slowing down.
  • Your Excavator hydraulic cylinder is overheating.
  • You realize that one of the sides of the piston is showing wear.

These signs determine a need to repair and maintain your Excavator hydraulic cylinder to increase its longevity.


3.    How many types of Excavator hydraulic cylinders are there?

In this modern world, it’s essential to understand the mechanics and designs of hydraulic cylinders.

Different types of cylinders utilize other mechanisms and designs for operation.

          Types of Hydraulic Cylinder

It’s essential to purchase cylinders from an engineering supply company that specializes in hydraulic power.

Four types of cylinders are widely used:

Single-acting cylinders:

Single-acting cylinders are ideal for situations that require one direction of motion.


Double-acting cylinders:

The double-acting Cylinder is used more often than the single-acting Cylinder.

This is one of the most commonly used cylinders because it is used in many different applications at almost any angle.


Piggyback Cylinders:

The piggyback design uses two cylinders, one after the other, to provide a longer stroke than a single cylinder. Piggyback cylinders are used when there is a long stroke and limited space.


Telescopic Cylinders:

Telescopic hydraulic cylinders, also known as piggyback or buy-back cylinders, are available in single and double-acting designs.

When stored, a telescopic hydraulic cylinder is compact and requires only a fraction of the space compared to a non-telescoping design.


4.    How do I know what size excavator hydraulic cylinder to buy?


In this guide, we’ll focus on the different factors you have to consider when selecting a hydraulic cylinder.

A great many factors affect the selection of the perfect Cylinder.

Such things as stopping the load, the direction of force, speed, stroke length, operating pressure, mounting style, and energy are essential considerations for choosing the right Cylinder for your situation.


First, figure out how much mass you want to move. Next, determine how much force it will take to move the mass.



After determining the force needed to move the mass, the next step is to assess the mass’s geometry.

For instance: The geometry of a hydraulic press is elementary. The press moves up and down.


Bore Size:

Once you calculate the formula for calculating your Cylinder pressure, you can then work out the proper dimensions of the cylinder bore.

The pressure formula is simply the product of the pressure produced by the system and internal pistons area.


Rod size:

Selecting the length of rod used in a given application requires careful consideration of the amount of load to be carried by the rod and the buckling strength needed.

A good rule of thumb is to choose a rod that weighs no more than one-third of the weight you plan to lift.


You must determine whether to use end caps for internal cushions.

The latest research shows that cushions are an excellent way to decelerate rods when colliding with end caps, protecting the cylinder end cap and reducing damage to the engine.


5.    How do you measure excavator hydraulic cylinders?


When measuring hydraulic cylinders, the primary part may include essential measurements such as circumference and depth.

Here are some tools you can use to measure hydraulic cylinder components:

  • Tape
  • Vernier calipers
  • Determine the retracted length of the Cylinder. It is the distance between the point where a pin is inserted into the press-to-measure Cylinder and the point where that same pin exits the Cylinder.
  • Measure the hydraulic Cylinder’s length in the core to a well-functioning pin that is extended the furthest.
  • Measure the stroke length, which is regarded as the difference between extended length and retracted length.
  • Determine the bore diameter and subtract the wall thickness from this diameter to get the Cylinder bore measured.
  • Measurement of Rod dia with the help of Vernier calipers.
  • Measure the pin and port sizes with rod and base dimensions.

By following these steps, you can measure the excavator hydraulic cylinder.


6.    How do double-acting Excavator hydraulic cylinders work?


This Cylinder has two ports, one for retraction and one for an extension.

The double-acting Cylinder is a type of hydraulic Cylinder that uses hydraulic fluid to both retract and extend the piston.

Double-Acting Excavator Hydraulic Cylinder

Like a traditional reciprocating engine, two pistons push and pull against each other. The action of the piston allows the Cylinder to move in one direction and pull in the opposite direction.

A double-acting cylinder is a special kind of piston in which different types of forces can operate. It can be used in applications where the power applied to it needs to go in both directions.


7.    What is the stroke of the excavator hydraulic cylinder?


The stroke of a hydraulic cylinder is the amount of extension in the piston rod. It is measured by subtracting the shortest length of the Cylinder from its maximum length.

Generally, the length of a cylinder is given in terms of its base radius. To find the maximum length of a cylinder, you have to add the radius and the length.

  Stroke of Excavator Hydraulic Cylinder

Stroke lengths are measured in inches, and inches are divided into smaller increments called fractions. The minor fraction is 1/64th of an inch.

A standard is that the compression ratio is usually the same for all cylinders of the same stroke length.

For example, most cylinders with a 12″ stroke will have the same compression ratio as other cylinders of the same stroke length.


8.    How do you select Excavator hydraulic cylinder seals?


To select the Excavator hydraulic seals, follow the given criteria:

  Excavator Hydraulic Cylinder Seals

  • The range of fluid pressure that a pump can produce. It’s maximum and minimum fluid pressures.
  • Range of temperature for fluid and cylinder assembly, ambient temperature, and when fluid is at rest.
  • The stroke rate of the reciprocating pistons how quickly the piston moves back and forth.
  • The type of fluid and viscosity
  • The bore and rod diameter specifications, the groove size and number, the overall stroke length and cylinder length, the surface finish of the cylinder walls.
  • Type of equipment you will install your Cylinder, environmental factors, installation of excavator hydraulic cylinder, and duty cycle.


9.    What is the use of excavator hydraulic cylinders?


An excavator hydraulic cylinder is a mechanical device that provides a unidirectional force at a point on its stroke.

It is widely used in the construction industry. It has many applications in manufacturing, such as civil engineering,

Hydraulic cylinders are widely employed in a wide range of mobile applications. These include backhoes and dozers, excavators, loaders, dump trucks, and graders.


10.      What material are excavator hydraulic cylinders made of?


The cylinder and piston rod of the Excavator is made from hardened high-strength alloy steel.

The hardness of the surface of the piston rod is HRC62, and it is chromium plated.

Many different metals are used to make the cylinder rods, but most commonly, they are made of steel or stainless steel and then coated with a type of chrome material.


11.      Why do excavator hydraulic cylinders fail?


Hydraulic cylinders can fail due to a lot of reasons. Some of them are listed below:

        Hydraulic Cylinder Failure

  • Excavator Hydraulic cylinders are vulnerable to physical damage. It may fail due to the deterioration of seals.
  • An excavator hydraulic cylinder can be damaged from various sources, including another machine or falling debris.
  • The dented excavator hydraulic cylinder could prevent the piston from returning to its original position, thus leading to failure.


12.      Can Excavator hydraulic cylinders be repaired?


Depending on the circumstances, there may be no alternative but to replace a hydraulic cylinder.

Hydraulic Cylinder Repaired

However, most cylinder damage is not worth repairing. Most of it can be restored to the condition or very close to the situation like it was original.

Subsequent repairs are generally more affordable while reducing future repair and maintenance costs.


13.      Why do excavator hydraulic cylinders leak?


The piston seal becomes locked on the cylinder wall when the pressure in the Cylinder equalizes.

When air, water, dirt, and grit enter the hydraulic fluid of excavator hydraulic cylinders, hydraulic seals may leak.

  Hydraulic Cylinder Leak

Heat more than a specific endurance limit when it exceeds it results in leaking of Excavator hydraulic cylinders.

So, it is recommended that you choose a material capable of enduring specific operational conditions.


14.      What causes an excavator hydraulic cylinder to bend?


Hydraulic cylinders can bend with side loads. This is a common issue with equipment, and it causes failure.

Side loads may result when the engine’s pistons are not centered on the connecting rod.

The more intense the pressure, the more strain will be placed on a seal, causing it to stretch, loose lubrication, and ultimately bending of the rod.

Side-loading can also cause wear to the cylinder bores and the Cylinder and rod bearings.


15.        Can you test an excavator hydraulic cylinder with air?


Yes, you can test an excavator hydraulic cylinder with air.

Air can be introduced into the system at external pressure but will not affect the operation of the movements.

A traditional method used to test the integrity of a piston seal involves pressuring air inside the Cylinder after the piston has been fully extended and then measuring if there is any seal leakage.


16.      Can Excavator hydraulic cylinders get air locked?


Air is referred to as a gas. It is impossible that any hydraulic seal can prevent air entrance even at extremely high pressures created by the hydraulic system.

If a cylinder is mounted so that the rod faces down, this creates a situation where a few cubic centimeters may trap some air.

But this amount of air does prevent piston movement insides the Cylinder.


17.      How do you bleed air from an excavator hydraulic cylinder?


If you want to bleed the air from an excavator hydraulic cylinder, you can follow the given steps:

    Bleed Air From an Excavator Cylinder

Put the throttle stick in the middle position and hold it for a while.

  • In case if there is an air bleeding valve located outside, then open it.
  • Wait until all trapped air has been released from the hydraulic oil line and a whole stream of hydraulic oil has been released from the valve.
  • Once all the air is drained from the Cylinder, then you can close the bleeder valve.


18.      How do excavator hydraulic cylinders work?


A pump is installed in the hydraulic system, which provides the necessary force that moves the fluid through the whole system.

The fluid moves through the way up to the valve and then enters into the excavator hydraulic cylinder, and here is where fluid energy transforms into mechanical energy.

The valves are used to open and close the liquid flow, keeping pressure within a safe range.


19.      How do you replace an excavator hydraulic cylinder seal?


To replace the excavator hydraulic cylinder seal, it is essential to remove the cylinder block top cover.

Access the workings by loosening two bolts for each piston.

After you have the top layer removed, clean away any dirt and debris from the old rod seal before installing a new one.

Now replace the old one with a new seal, put the cylinder top cover back, and screw it tight.


20.      How do you control an excavator hydraulic cylinder stroke?


An excavator hydraulic cylinder consists of a movable piston that can be retracted and extended to engage or disengage to control or limit the required power because of actuating element.

This will help controlling excess hydraulic fluid circulation and ultimately controlling an excavator hydraulic cylinder stroke.


21.      How many excavators hydraulic cylinder costs?


The cost of the excavator hydraulic cylinder will depend on several factors, including the type and model of the equipment that requires a new cylinder, material type, whether or not any defective parts have to be replaced by the manufacturer warranty, cylinder dimensions, and pressure ratings and warranty details.

Usually, the price of an excavator hydraulic cylinder resides in the range from $200 to $100.


22.      Do you need to bleed excavator hydraulic cylinders?


Yes, it is imperative to bleed an excavator hydraulic cylinder. Otherwise, it may lead to the following issues.

Aeration is a problem. It damages hydraulic fluid causing damage to the system components due to loss of lubrication. As the seals burn, they can cause overheating and burning of the system components.

Aeration is known as cavitation, causes vapor bubbles to form in the fluid. When these bubbles implode, they create small pockets of high pressure that can damage components and contaminate the fluid.

Air in the tank can cause foaming, making it hard for the equipment to run at optimal efficiency.


23.      What is column load in Excavator hydraulic cylinders?


A column load is applied in a direction parallel to the axis of the member. Due to the sheer force, it can induce buckling.

A pure bending load causes the same consequences and failures as a side-load.

Cylinder rods are usually designed to bear column load. Column load-bearing can fail the combined effects of a column and pure bending.


24.      Can I import Excavator hydraulic cylinder from China?


Yes, you can import an excavator hydraulic cylinder from China.

Importing from China is a good choice. They provide high-quality material at the lowest price.

China excavator hydraulic cylinder manufacturers also provide custom excavator hydraulic cylinders upon request.

You can order an excavator hydraulic cylinder in desired weight, strength, and length just according to your needs.

One good thing about importing from China is that you can order as much as you want. There is no minimum or maximum order requirement.

Once you have placed your contact details, Chinese excavator hydraulic cylinder manufacturers always deliver on time directly to your doorstep.


25.      How do you fill an excavator hydraulic cylinder?


You can follow the listed steps to fill your Excavator hydraulic cylinder:

  • To prevent oil spillage from hydraulic hoses, place a thick layer of newspapers underneath the hoist cylinder.
  • Use a clean and new oil can. Make sure the can is thoroughly cleaned out of any old oil and filled with oil.
  • Remove the oil filler cap from the oil can using a can opener or scissors.
  • Place the can opener or scissors in the small hole on top of the oil can.
  • Squeeze the trigger on the oil can to release any air trapped inside the can.
  • Point the nozzle of the oil can go into one of the holes in the Hydraulic Cylinder.
  • Fill the oil in the Cylinder and then remove any oil spillage with cleaning fabric to avoid fire instigation.


26.      What is the maintenance requirement of excavator hydraulic cylinders?


The maintenance requirement of excavator hydraulic cylinders is essential to keep them working.

Therefore, the maintenance procedure must be carried out carefully.

Before starting to work on cylinders, you should prepare for a backup cylinder.

If the working cylinder fails, all work will be stalled.

Detecting the failure of Excavator hydraulic cylinders is an easy job.

You can detect any leakage in the hydraulic system by observing it from above or below at rest or when ramming.

If leaking exists in any cylinder, you should first stop using it and disassemble it for overhauling according to the instruction’s manual.


27.      How to install a hydraulic Cylinder in an excavator?


Check the machine state and check the oil level of the hydraulic tank.

According to the size of the Excavator, install the mounting bracket on the excavator body.

  Install a Hydraulic Cylinder

Please make sure that all holes are aligned and install it on a firm surface with a wrench.

Many factors determine the correct position of the hydraulic Cylinder in an excavator.

You must install an excavator hydraulic cylinder. It must deliver sufficient power to operate the machine, meet the load requirement of a specific device and operate at high speeds.


28.        How do you calculate the force of an excavator hydraulic cylinder?


The force of a hydraulic cylinder is expressed in pounds.

It is determined by multiplying the cross-sectional area of the piston with the pressure of fluid in psi.

To calculate the tonnage of an excavator hydraulic cylinder, divide the force in pounds by 2,000.

To determine the area of the piston, first, determine the dia of the piston with a ruler.


29.      Can an excavator hydraulic cylinder explode?


Yes, an excavator hydraulic cylinder can explode.

Aeration causes damage to hydraulic cylinder seals due to loss of lubricating oil. When compressed, its mixture of air and oil will explode, damaging the hydraulic cylinder seals.

When air and oil mix, pressure can build up and cause the system to break down.

When air is injected into a cylinder during lubrication, it can become too full and cause a pressure build-up. It can cause leaks in the excavator hydraulic cylinder.


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