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How to Repair a Hydraulic Cylinder

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How to Repair a Hydraulic Cylinder
Latest company news about How to Repair a Hydraulic Cylinder

Hydraulic cylinders are an integral part of the hydraulic system. They are a mechanicalactuator that provides the unidirectional force. Integration of hydraulic cylinders will eliminate the presence of levers and gears. Both mobile(hydraulic presses, cranes, forges,and packing machines) and industrial systems(agricultural machines, construction vehicles,marine equipment) utilize hydraulic systems. Among them, most of the application use hydraulic cylinders for lifting, picking and gripping.

Every hydraulic system will contain basic components like pumps, cylinders, valves, filters,etc.. Hydraulic cylinder is one of the least complicated components in the list. So, theyare easy to repair and maintain. A person having basic knowledge about the hydraulic system can perform hydraulic cylinder repairing. Before explaining the repairing of cylinders, Iwill give you brief details on the causes of hydraulic cylinder failure. Damage of seals is a common reason that creates hydraulic cylinder damage. Seal damage occurs as a result of the incorrect fitting, corrosion, inappropriate metalwork clearance, etc.

Fluidcontamination will damage the piston rod or seal surface. Improper alignment of cylinder andload will damage the rod bearings or piston rods.

An internally corroded barrel will contaminate the fluid inside it.

Extreme temperature and chemical attack are the other reasons for failure. Before performing the repairing, clean the surface properly and disconnect the hoses and plugs attached to it. After disconnecting the parts, drain all the fluid present inside the cylinder.

Now, let's begin the repairing of the hydraulic system. For that we need tools.

Proper seal kit, rubber mallet, screwdriver, punch, pliers, emery cloth, and torque wrenchare the tools required for repairing. Leaking hydraulic cylinder is the most common issue that results in cylinder repair. Disassembly of the cylinder, diagnosing the cause of failure, repairing or replacing faulty components, and rebuilding the cylinder are the steps involved in cylinder repairing. During the process of hydraulic cylinder repairing, always consider the below-entioned cylinder repair tips.


1. If you disassemble the hydraulic cylinder as a part of repairing, inspect not only thefailed part also perform a thorough inspection of all other components.

2.Hydraulic wear bands(also called wear bush or guide ring) are used for guiding pistons.So, don’t forget to assemble the wear band because this will reduce the metal-to-metal contact.

3. Premature failure of rod seals indicates the bend on the rod.

4. Metal tools will scratch the surface of the cylinder and will create problems like corrosion. So always choose the best-fit tools for repairing.

5.Larger hydraulic cylinders use high tension springs to perform operations. So, if you arean inexperienced worker, be careful while handling such cylinders.

6. For replacing seals, don’t measure the existing size of the seal. It will expand orcompress according to the environmental condition.

The seals are key parts for hydraulic cylinder normal working after you solve othe problems. So choose a high quality seal kit for your rebuilding cylinder is essencial. In anexcavator hydraulic cylinder seal kit, it includes dust wiper ring(DKB/DKBI),back up ring(BRT),rod seal(main seal), buffer ring(HBY), piston ring(SPGO/SPGW/SPG/SPGA/OK Seal),wear

ring(WR),slide ring(KZT),oring,N4W and DU busing if you require.



1.Hydraulic Cylinder Seal Kit-- Rod Seal



The rod seal is the most critical seal on any type of fluid power equipment preventingleakage of fluid from within the cylinder to the outside. Leakage through the rod seal can reduce equipment performance, and also in extreme cases can cause environmental issues.

Guangzhou De YuLong Congstuction Machinery Co.,Ltd.offer high quality brand made rod sealslike KYB(KAYABA),NOK,WYS,SKF,Hallite etc. to make sure the                                                                                           high performance of the seal kit.

                                                                                                                                                                                    2.Hydraulic Cylinder Seal Kit-- HBY Buffer Ring/Seal


HBY buffer ring does more then normal buffer ring does, not only just buffer the pressurespikes of hydraulic systems, but also acts as a primary seal and pressure spike suppressor. It is mainly used in construction machinery cylinder.The high quality genuine brand made products like KYB(KAYABA),NOK,WYS,SKF,Hallite etc.is available.




3.Hydraulic Cylinder Seal Kit--Wisper/Dust Seal



Dust seals are installed in the sealing configurations of hydraulic cylinders to preventcontaminants such as dirt, dust and moisture from entering the cylinder as they retract back into the system.

The dust seal is the most undervalued seal type in the hydraulic cylinder in relation to itsimportant function. Particular                                                                                                       attention should be drawn to its selection, the                                                                                                                       surroundingenvironment and service conditions must also be                                                                                             taken into special consideration.This part also have                                                                                                             KYB(KAYABA),NOK,WYS,SKF,Hallite etc.brand made for                                                                                             your choice.


4.Hydraulic Cylinder seal kit-- PTFE piston seals


PTFE piston seals works perfectly as double acting Piston seals of hydraulic components suchas injection molding machines, machine tools, presses, excavators, forklifts & handling machinery, agriculture equipment, valves for hydraulic & pneumatic circuits and so on.

Brand made parts or the high quality made in China parts could be your choice.


5.Hydraulic Cylinder seal kit-- Phenolic Wear Rings



The function of a hydraulic phenolic wear ring is to guide the shaft and hole sealing of ahydraulic cylinder, absorbing transverse forces. At the same time, it prevents metal-to-metal contact, optimizing the performance of the sealing system.






According to above the key parts we choose for you, we can make sure the excellentperformance and competitive price of the seal kit. Excellent quality, high cost-effective products, in time after sale service will make us be your most reliable partner.



latest company news about How to Repair a Hydraulic Cylinder  8




Pub Time : 2020-08-07 16:55:38 >> News list
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Guangzhou DeYuLong Construction Machinery Co., Ltd.

Contact Person: Echo Hu

Tel: 86-136 7625 7200

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