Xugong KS Strong and Compact Mini Excavator Swing Motor

Mini excavator swing motors are core parts for the operation of your excavators. Xugong KS mini excavator swing motors are highly reliable and high-tech.

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Our compact design in our mini excavator swing motors displays powerful and high functioning performance. Our mini excavator swing motors have excellent maintenance with its oil and fluid dynamics.

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Powerful Mini Excavator Swing Motor for Your Minis

Xugong KS has carefully designed these mini excavator swing motors to be compatible with mini excavators. Our mini excavator swing motors have a power-to-weight ratio to increase productivity without having to overheat your minis.

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Mini Excavator Swing Motor – The Definitive FAQ Guide

Mini excavator swing motor plays a significant role in the rotation of the upper assembly of the mini excavator in any direction needed. This FAQ provides you with in-depth insights on mini excavator swing motor, working principle of various components included in swing motor, failure reasons, and much more.

1. What is a mini excavator swing motor?

Mini excavator swing motor is a part of mini excavator used to accomplish the hydraulic swing movement. The hydraulic fluid provides the power and causes the motor to achieve the swinging motion. The mini excavator swing motor has gears subjected out from one end. The teeth of this gear mesh with the slewing ring teeth—the pressurized fluid is causing meshing between these teeth’s thus producing movement.

This motion then causes the chassis of your mini excavator to rotate 360 degrees. This movement ultimately helps the operator to rotate the chassis and attachments on boom and arm without moving the mini excavator from one place to another. The components on the chassis include

• Mini excavator boom,
• Mini excavator arm,
• Mini excavator operator cabin,
• The mini excavator tool attachment moves in 360 degrees to facilitate on-site operations.

2. What materials are used in making a mini excavator swing motor?

There are mainly three kinds of materials widely used in the production of mini excavator swing motors. The first is cast steel plate, the second is cast steel, and the third is cast iron. The cast steel plate is made by smelting cast steel. It can have a maximum hardness degree of HRC62-68, high strength, and good toughness.

Cast steel has a unique chemical element structure, so it has good mechanical properties. Cast iron is made by smelting gray cast iron or semi-finished materials using the vacuum casting method or chemical casting technology. It has high strength and toughness and a low coefficient of thermal expansion.

Some other materials also include alloy steel, PTFE or rubber, and aluminum which you can use to make mini excavator swing motors. Alloy steel and aluminum are used for making mini excavator swing motor components. On the other hand, PTFE or rubber is used to make seals, which aid in the operation of the swing motor.

3. What are the benefits of a mini excavator swing motor?

There are several benefits associated with your mini excavator swing motor. Some of the main benefits are as follows:

• It allows you to move your excavation tools in any direction within 360 degrees.
• Mini excavator swing motor increase the efficiency of your operations
• This equipment increases the speed with which you complete your tasks
• With the mini excavator swing motor, you can precisely place the tool where you want. Hence it increases working precision and accuracy
• Swing motor helps you save a lot of time and reduces your labor cost
• With this tool, you don’t need to relocate your mini excavator or change its place to operate.

4. What is the role of the valve plate in the mini excavator swing motor?

The cylinder and valve plate assembly are the heart of any mini excavator swing motor. It operates with an electric or hydraulic pump and then distributes the fluid to the cylinder, which is quickly and forcefully delivered in a ramming process. The valve plate is located at the rear end of the mini hydraulic motor. The function of the valve plate is to regulate the flow of oil.

It uses a non-return valve to control whether or not oil can return to the suction chamber, and it also has a working mode switching function. By using the valve plate, the user can control how much fluid goes into each motor to produce an increased or decreased force to turn the cylinder. Thus, one can alter the direction of rotation (swing) of hydraulic motors.

5. What is the role of snap spring in mini excavator swing motor?

The snap spring is a mechanical device that connects the armature and wiring (the electrical connection) on a hydraulic motor. The action of the device causes an electrical charge to the wiring, which activates the motor and begins moving the machine.

It is usually attached to a pin system that allows for unrestricted motion of the armature. The spring also ensures that there is no loss of electricity before movement. The strength or tension of the spring plunger, which is subjected to the motor stroke, determines the work that the motor can bear.

When lifting a load, if there is no force on the motor, its plunger will stay at the bottom (maximum stroke) and will not rotate. If there is no pressure on the motor plunger when pressing a load, it will rise to its minimum position (no minimum stroke) and continue to rotate.

6. What is the role of spring in the mini excavator swing motor?

The function of the spring in swing motor is to absorb the moment when the mini excavator is overturning. Once overturning, the energy has resulted from inertia, which causes overshoot and vibration of the swing motor. The spring absorbs this energy to reduce the vibration and noise of the swing motor. Spring-type properties are elastic, plastic, and creep.

When the load acting on the mini excavator is small, there is no need to change, as long as it does not affect movement. When the load increases, the function of the spring is clearly to absorb the energy produced by this increase in load and convert it into potential energy to form a special force. Thus, relieving stress on equipment components and reducing the damage caused by excessive loads.

7. What is the role of the washer in the mini excavator swing motor?

A washer is a circular piece with a hole in the center that fits a round object such as a screw. In an excavator, the washer is placed between the motor and armature tube as a bearing.

Washers with holes smaller than the shaft’s diameter are used as locking washers to prevent loosening or make it easier to install parts. The washer is made up of steel, aluminum, or PTFE. The metal disk is connected with the washer by a bolt.

When the swing device moves from left to right, the earth rod connected with the earth wire moves, and the movement of the earth wire will cause some parts to move. The function of the washer is to prevent damage and deformation on parts and components in the assembly and improve work efficiency.

8. What is the role of the cylinder block in a mi

ni-excavator swing motor?

The cylinder block is the key element of a mini excavator swing motor. It houses the engine, drive train, and actuating equipment. Swing motors are powered by hydraulic fluid. The cylinder block contains an oil pump that moves hydraulic fluid to the swing motor assembly. The cylinder block must be kept free of dirt, debris, and water to avoid unnecessary premature wear.

Cylinder block can be seamless steel casting, with low thermal conductivity, high heat resistance, and good heat preservation performance. This is performing an essential role in machining accuracy and machinery life on swing motors. It can make sure the spindle work on a high-quality level.

9. What is the role of the press pin in the mini excavator swing motor?

Press pin, also called press bolt and swing pin, is a swing motor part made of high-strength galvanized steel. It has three holes, through which the operating rod passes and pressing bolt bends. So, we can use it to connect the working rod with the frame to make the working rod move back and forth to do actuator work between two pipes for hydraulic cylinders.

Press pin with spring-loaded function can go through with the motor (swing) for:

• Pressing with driving gear;
• Pressing the press pin with thrust force to swing forward or backward;
• Pressing the press pin to stop spinning;
• Pushing the press pin with the thrust force to keep the mini excavator swing motor balance.

10. What is the role of a ball guide in a mini-excavator swing motor?

The ball guide is an essential mechanical device responsible for the smooth rotation of the swing motor. It transmits the power that allows the swing motor to produce rapid forward and reverse motion.

It absorbs the vibration of the power transmission system and reduces slippage, increasing the machine’s transmission efficiency. The role of the ball guide is significant in the mini excavator swing motor. The ball guide has high precision. If it is worn, it will lead to the insufficient accuracy of the swing motor. Then, the performance of the mini excavator is greatly affected. Therefore, the ball guide needs to be replaced timely if it is worn.

11. What is the role of piston shoe in mini excavator swing motor?

The piston shoe in the mini excavator swing motor has two functions: controlling the speed of the hydraulic cylinder and absorbing the shaking of equipment, controlling the work function. The piston shoe is a piece of must-have equipment to excavator swing motor, and its function is to withstand the high pressure and move forward oil or hydraulic fluid. The piston shoe is a component of a mini-excavator swing motor. It is a buffer between the main cylinder and the swing cylinder.

In other words, when pressure from the pump goes into the swing cylinder, it needs to be buffered before going into the main cylinder. This way, it can reduce the strength of the pressure onto the main cylinder wall, making it easier on equipment.

12. What is the role of retainer plate in mini excavator swing motor?

The retainer plate mainly functions as a sealing device. The mini excavator swing motor can seal the hydraulic oil leakage and do separation between the rotor and housing. The retainer plate is installed inside the swing motor cavity. Its primary function is to prevent the support plate and the tensioner plate to rubs against each other when they are in contact during operation.

Retainer plate (also known as retainer spring, spring guide plate, return the ring, bearing guide plate) is a typical structure in the motor bottom cover of transmission machines. It is mainly used to support the shaft and form the motor bottom protective structure.

13. What is the role of swash plate in mini excavator swing motor?

The Swash plate mechanism makes the hydraulic piston rod in unlimited rotation and sliding motion. A Swash plate is a flexible structure with a certain quantity of lubricating oil in it, and a swash plate performs the functions of restricting rotating range and sealing. Swash Plate enhances the design of the mini excavator swing motor, which will increase the operational efficiency and stability of the device.

The swashplate resides on the one end of the mini excavator swing motor, and it also provides support to the components within the mini excavator swing motor. This plate allows the swing motor to rotate your excavator boom, arm, or attachments in any direction you want.

14. What is the role of gear in a mini-excavator swing motor?

The gear of the swing motor works to reduce the rotational speed and increase the torque and power of the hydraulic motor. The swing motor includes a gear train composed of a worm gear, a pinion gear, and a bevel gear attached with an input shaft of the swing motor. The motor transfers its swinging power to the shaft on which gear is attached. The rotation of the shaft causes your gear to rotate.

The teeth of this gear mesh with the swing drive of the mini excavator. This swinging power converts into rotational motion. The torque is more, and the speed is slow because this swing motor rotates the whole upper assembly in the mini-excavator and helps you achieve the desired function.

15. What is the role of the pin in the mini excavator swing motor?

The pin plays an essential role in preventing the swing motor from deformation during the operation, mainly used to adjust the eccentric bushing seat clearance. The pin is alloy steel, processed by a precision turning machine, with complex chrome plating processing. The pin in the swing motor can be divided into one piece and two pieces according to different situations.

One is the pin through the three holes, and the other is just two holes and a hole in the middle of the rod and no spot on both sides of the rod. It can be divided into T-shaped, half-slip shape, L-shaped, Y Y-shaped. These pins hold the parts in place and prevent loosening in the mini excavator swing motor assembly.

16. Are there any problems associated with the mini excavator swing motor?

There are several problems associated with your mini excavator swing motor. Some of the main issues are as follows:

• The teeth on the gear worn out when used frequently or in a harsh environment
• Loose components result out due to the improper operational procedures following
• Noise or vibrations in the system because of loose parts
• Poor quality materials cause you to handle frequent replacements
• Improper installation may result in loss of power. This will make you unable to rotate the attachment or operator cabin
• A low level of hydraulic oil in your mini excavator swing motor may result in excessive heat or damage to the equipment

17. What causes the failure of the mini excavator swing motor?

There are several reasons why your mini excavator swing motor may fail. Some of the main reasons are as follows: The failure of the mini excavator swing motor is usually caused by high temperature, long time working, overload capacity, improper use of the power supply source voltage, the impact load is higher than the designed level, etc.

The negligence of bearings can cause swing failures. If the bushing is broken, chips on the motor shaft, if the hole is worn out, gear teeth are also possible. In the majority, swing motor failure is caused by water and dust getting into your mini excavator swing motor due to working in bad or challenging conditions.

18. How long will your mini excavator swing motor last?

Several factors affect the life of your mini excavator swing motor. Some of the main factors include:

• How often do you use your mini excavator swing motor
• The conditions in which you use your mini excavator swing motor
• Do you follow the proper maintenance requirements or not?
• The quality of materials used in the manufacturing of your mini excavator swing motor
• Manufacturing method utilized in making your mini excavator swing motor
• The operator skill level and experience level to operate your mini excavator swing motor

Considerations of these factors have a significant influence on the life of your mini excavator swing motor. In case if you take care and follow the maintenance requirements and pay heed to the design features of your mini excavator swing motor. You will surely get a long life of your swing motor.

19. What kind of oil to use in a mini-excavator swing motor?

The kind of oil used in the mini excavator swing motor is mixed with refined mineral oil and special additives. When choosing the fluid to be used, it is imperative to consider the operating conditions and the characteristics of the various hydraulic fluids available.

Standard gear motor oils can be used in mini excavator swing motors under normal operating conditions. However, when the temperature is over 125 F, multi-grade oil should be used. When the ambient temp is below 30 F, grease with a low viscosity should be used. A multi-grade oil is a blend of some oils and additives that provide a balanced oil in a range of temps between low and high, which in most cases will cover the swing motor in most applications.

20. How does oil add to the life of a mini excavator swing motor?

Not only does good oil keep your mini excavator swing motor running more efficiently, but it also extends the life of various moving parts. The most important thing is whether the appropriate amount of oil has been added and what kind of oil should be used?

First, you must know the content of the oil is high quality. Then you need to master how much oil should be added to a swing motor? With higher temperatures, whether forced or idling, comes carbon deposits, which shorten the component’s life. This is no exception with the electrical motor inside a mini excavator’s swing motor.

The device may appear to be okay and functioning correctly, but if the oil has been neglected and become dirty, this will affect how it performs. Oil for mini excavator swing motor also includes additives that coat the metal surface and prevent corrosion from moisture and other elements.

21. What is the role of seals in a mini-excavator swing motor?

The seal is the core, plays an important role. Seal mainly refers to the seal ring. The purpose of seals in the mini excavator swing motor is to eliminate the leakage, reduce the hydraulic oil consumption, and increase the hydraulic system’s lifetime. There are many types of seals for swing motors:

• The seal material is glass fiber reinforced Teflon (FEP);
• Seal material is glass fiber reinforced Teflon + silicone rubber;
• The seal material is glass fiber reinforced Teflon + ethylene-propylene rubber;
• The seal material is thermoplastic.

The seal is a mechanical device formed between the mating surfaces of the parts and provides a seal, which prevents loss of pressure or gas from one side of the devices. It also prevents dirt or debris from entering your mini excavator swing motor.

22. What is the role of thrust plate in mini excavator swing motor?

The thrust plates are essential parts of swing motors. The thrust plates are used to withstand the nuts’ thrust force and ensure the reliable operation of swing motors. It provides the equipment operator with the ability to move the equipment in different directions and control many aspects of the machinery’s functionality.

It is a vital part of the hydraulic system, so the quality must be excellent and reliable. The thrust plate in the swing motor is generally made of aluminum or cast iron to withstand the centrifugal force on the axle of the swing motor. Its purpose is to press the main hydraulic cylinder against the swing arm to ensure that there is no play on the axis of the swingarm.