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Excavator Log Grapple – The Definitive FAQ Guide

The excavator log grapple step-by-step guide will provide you with all the crucial information you need when deciding to buy an excavator log grapple. This guide contains extensive information on excavator log grapple, components role, the material of construction, applications, reasons for failures, the role of angle in tines, and much more.

1. What is an excavator log grapple?

An Excavator Log Grapple is a tool that can be used on excavators. The Grapple is used for loading and offloading logs, but it can also be used in other situations like moving earth and large chunks of material. It is attached to the excavator’s arm with rotating clamps called grapple tines or jaws. The number of tines available in an excavator log grapple varies from model to model.

Excavator log grapples with tines powered by bucket cylinder and can rotate 360 degrees to locate the direction to pick up logs. This, along with its extra displacement for a wider bite, gives it a considerable advantage to transfer comparatively larger logs from one place to another.

2. How would you define the working of an excavator log grapple?

The working principle of an excavator log grapple is based on the hydraulics of your excavator. The hydraulic fluid receives its pressure from the hydraulic pump, which is driven by the motor. This pressurized hydraulic fluid moves through hydraulic lines up to the excavator log grapple cylinder.

The valve opens, allowing hydraulic fluid to flow under high pressure into the cylinder through a check valve, which prevents it from draining back into the tank or other parts. This fluid causes the piston to move upward and downward, converting this fluid pressure into mechanical force, driving log grapple tines and grapple rotation. The operator directly from his cabin controls the pressure level depending on the type of rotation and force on clamping to pick up logs.

3. What are the applications of an excavator log grapple?

There are several uses of an excavator log grapple. Some of the main applications are as follows:

• Excavator log grapple can be used in various forestry-related tasks, including moving logs from the ground to the desired location.
• I was loading timber from a truck into an offloading area.
• You can also use it to pick and transfer larger blocks of rock for further processing.
• Log grapples can also be used to load metal scrap onto the truck to transfer them to nearby plants for recycling.
• You can utilize excavator log grapple in loading or unloading heavier and bigger material by saving a lot of time.

4. Which material is used in making an excavator log grapple?

You have a lot of choices when it comes to an excavator grapple for your excavator. There are different types of material used in making excavator log grapple. These materials include alloy steel, high carbon steel, low carbon steel, forged steel, cast iron. The material and their thickness or compaction vary depending on the application hardness to which they were subjected.

The log grapple is a tubular steel structure; the main beam and the cylinder beams are made of weathering steel processed by heat treatment, and the canopy and hoist are made of high-strength alloy steel. The outer shell is made of a wear-resistant plate, and the under-beam tubes are made of wear-proof low carbon steel.

5. What is the role of continuous rotation in excavator log grapple?

The primary purpose of the rotator in the log grapple is to move the tines on one arm of the excavator outwards and inwards. It does this by taking hydraulic power provided by a hydraulic pump and rotating a worm gear at a specific speed. The power from the worm gear moves a shaft inside the rotator, which applies pressure onto a piston mounted between two cylinders.

One cylinder pushes fluid in one direction, while the other moves in the opposite direction. This results in an arm on the excavator being pushed outwards, leaving room for logs to be picked up and then moved back in to grip the record.

6. Which materials can an excavator log grapple handle?

There are different types of materials that your excavator log grapple can handle. The design specifications and the number of tines associated with your excavator log grapple determine which materials it can handle.

Some of the main materials are as follows:

• The excavator log grapple is used to handle iron scrap in the scrap industry. It can crush the waste at the spot instantly and can also transfer it for processing.
• In the waste industry, it is used for loading and unloading waste or waste manipulation.
• You can pick up and move both small diameter and large diameter logs with your excavator log grapple.
• Rail construction is used to lift and move the heavy iron bars for successful installation and time-saving.

7. How much does an excavator log grapple cost?

You cannot determine the cost varies depending on the single element or factor. Many factors play a major role in deciding the cost of your excavator log grapple.

These factors include

• The design specifications of your excavator log grapple,
• How long will excavator log Grapple last,
• The power it needs to have an optimum drive,
• Material and their characteristics employed in manufacturing of an excavator log grapple.

The cost of an excavator log grapple with 360-degree rotation and a one-year warranty lies in the range of $850 to $9000 per piece. The price of an excavator log grapple weighing 1200 kg with a maximum jaw opening of 1000mm with a warranty of 2 years lies in the range of $500 to $2000 per piece.

8. How long does an excavator log grapple last?

The life associated with your excavator log grapple varies, and it depends on a lot of considerations.Log grapples get worn down over time by the load they lift, the ground they move through, and the pressure of carrying logs. If you have a log grapple made up of extremely durable and hard material, it will last longer.

In general, the life associated with your excavator log grapple lies in the range of 3 to 5 years or 10,000 working hours. If the working conditions involve a harsh environment with high temperature and humidity, this will develop trust in your excavator log grapple resulting in more friction and damage.

9. What is the role of the piston in the operation of excavator log grapples?

The piston is the most important part which drives the excavator log grapples. It controls the movement of the lifting and lowering rods and operates the hydraulic cylinder that contains the direction of the lifting and lowering rods and the rotation and grabbing of the grab.

An excavator’s hydraulic system is used to power most of the attachments, including log grapples. This is because they operate under a large range of pressures and flow rates. The cylinders that control the grapples must be extremely strong but also lightweight and cost-effective. A piston with a full-bore skirt and a non-rotating rod seal makes an excellent choice.

10. What are the maintenance requirements of an excavator log grapple?

The requirements for maintenance on an excavator log grapple depend on the machine it is mounted on. However, most machines require lubrication and blade replacement and repairs to hydraulics in case of problems occur. The maintenance requirements for an excavator log grapple are to keep it in high performance and prevent costly damages.

The maintenance involves keeping an eye on your excavator hydraulic system and regular inspection of mechanical parts of log grapples. Maintain an optimum amount of oil in your excavator log grapple. Prevent losing of any part and keep the bolt tightness at an optimum torque. Follow-up detail maintenance will help you not only increase the efficiency of your log grapple but reduces downtime.

11. How to install an excavator log grapple on your excavator?

There are two ways to install your excavator log grapple on your excavator’s arm. One is by hiring a professional technician, and the second is by yourself. The process starts with arranging the right tool kit containing the tools you need to complete the installation. The first step is to connect the quick hydraulic coupler to your excavator’s arm and connect the hydraulic lines.

Make sure to tighten the bolt at the desired torque to avoid leakage and loss of hydraulic pressure. Connect your excavator log grapple to a quick hydraulic coupler and tight the fittings as necessary. When you finish installing your excavator, log grapple tests it by lifting a log to ensure it is working fine.

12. What is the role of seals on the excavator log grapple?

The seals on the excavator log grapple must play a key role in protecting the hydraulic system from external elements. Specifically, the main function of these seals would be to prevent hydraulic oil from leaking from the hydraulics towards the outside environment.

In addition, as it normally does, these seals will also secure the hydraulic fluid inside of its intended reservoir and prevent non-hydraulic liquids from entering. The seals on an excavator are more than just rubber gaskets to seal the machine’s moving parts. They protect against dirt, debris, and then some. This ensures that your hydraulic system can perform at maximum capacity without compromise or failure.

13. What role does a quick hydraulic coupler play in excavator log grapple?

The quick hydraulic coupler plays a pivotal role in deciding the efficiency and safety of log grapple. The quick hydraulic coupler, located at the end of the arm, allows the utilize of the pump and hydraulics for turning and rotating excavator log grapple to get a perfect grip on logs or big chunks of metal like debris and rocks during operations like loading and unloading.

Quick hydraulic couplers operate with the main cylinder, are made of heavy-duty alloy steel, are heat-treated for strength, welded for accuracy, are installed using high-quality fasteners, are field ready once installed onto Excavator Log Grapple. Without the quick hydraulic coupler, you are unable to operate your excavator log grapple efficiently and effectively.

14. What is the role of gear in excavator log grapple rotator?

Gear plays an important role in the excavator log grapple rotator system. Additionally, different models are available for your choice according to your application conditions. The gear helps power the rotating motion of the Grapple. The palm grip is a saddle-shaped component mounted on top of a short column attached via a pivot to the long queue.

The palm grip swings over the bit, grabbing it with its teeth and restraining it from swinging out whenever the boom angles pick up off of horizontal. A hydraulically actuated cylinder is traditionally used for this function, but modern hydraulic cylinders are almost always found on modern excavators for this purpose.

15. What type of oil goes into the excavator log grapple?

The right kind of oil in your excavator is important for its performance and stability. Excavator log grapples are equipped with hard-working cylinders that contain hydraulic oil to allow much greater workloads when compared to other competitive units. They offer a degree of flexibility but are required for any job. There is a wide variety of oils to choose from when filling out an application for your log grapple machine.

The best tip is to look for SAE 30 or higher, and the oil’s viscosity can be somewhat diluted as long as you use synthetic oil. Remember that all oil brands will meet or exceed OEM specs, and each one has a different set of traits and qualities you may be looking for.

16. What are the problems associated with the excavator log grapple?

There are several issues associated with your excavator log grapple. Some of the main problems are as follows:

• When operating at high speed, the Grapple requires a certain degree of accuracy.
• If the angle is too steep or too deep, it will snap or rock the logs out of place, causing unnecessary damage.
• Due to the machine’s weight and the sheer power that the machine exudes, it can be dangerous if proper safety procedures are not exercised.

As to the problems associated with the excavator log grapple, it caused by follows:

• The rotator’s lubrication is not good enough;
• The voltage cannot control the cylinder’s pressure;
• The cylinder rotation is not continuous;
• If one cylinder should be broken, it will affect other cylinders;

If you keep up with the maintenance, these problems can be minimized.

17. What characteristics are embedded in excavator log grapple oil?

The robust performance of our Grapple line of oil features proprietary formulations that deliver unmatched heavy-duty protection for your log grapple. Its premium protection comes from the industry’s widest range of on-demand additives, including the latest bio-based polymers, dispersants, and more.

Grapple offers continuous rotation, an early release feature to prevent glazing, and special high temperature oil for face loading your Grapple for added versatility. It is formulated for all weather conditions, and you can also use it in severe operating conditions that include mud, water, snow, and similar challenging working environments. The right lubricant keeps your log Grapple up and running, which is why you need an oil that contains the latest technology.

18. How to choose an excavator log grapple?

First, you will need to acquire the right Grapple for your machine as there are different makes and models. You will also need to see your dealer or consult your owner’s manual to check the weight of the machine you own to ensure that the device can carry out the importance of the log without too much effort.

This may cause a major issue with you trying to lift a massive log with a smaller machine, potentially damaging it even more. You need to consider the cost and budget for your excavator log grapple, the nature of the application you want to use it for, and its durability.

19. What is the role of valves in excavator log grapple?

The valves are used for the hydraulics of the Excavator Log Grapple because they are capable of heavy-duty work. The valves are used to control the flow of hydraulic oil, lubricate the cylinder rod and complete the flow circuit for the log grapples. When the operator moves the control lever, hydraulic oil will flow through the valve into cylinder rods to rotate them.

The valve plate movement pushes up or down on the valve stem (closed) cavity hole (open) valve clearance. The cylinder guard is equipped with a pair of valves to prevent any leakage from its joints, where the seals are not applicable. Valves are important parts of hydraulic excavator log grapple.

20. What is the role of tines in excavator log grapple?

The tines are one of the main parts of an excavator log grapple. The tines are the part that grabs the log or tree itself. There are many types of tines. Several tine types exist. The most widely used are single tine and double tine, with double tine being more common.

The load capacity is higher with double tine because it is gripping onto something at both ends of the tine, therefore maintaining more force on whatever it was grabbing onto.

When the operator presses a switch on the hydraulic control panel, hydraulic pressure on the grapple cylinders increases, increasing pressure on both sides of each arm on all tines. When this happens, each tine has enough force to pull on any part of a tree, regardless of its position.

21. What causes the failure of an excavator log grapple?

A variety of factors can lead to the failure of an excavator log grapple. The most common failure is due to improper maintenance or lack of regular preventative maintenance. Other factors include poor boom alignment, improper hydraulic hose installation, and misalignment of the cylinder support bracket on some models.

The most common cause of failure is a faulty hydraulic cylinder. This happens over time as the cylinder deteriorates, compromising the ability to control the log grapple and grab rotation. Other causes relate to excessive wear, improper operation, or maintenance. The level of oil in the excavator log grapple cylinder is less than the optimum level, which also leads to speedy failure.

22. What is the role of angle in excavator log grapple tines?

Excavator log grapple tines must be designed with a high degree of angle to gain the most friction from the wood and prevent it from spinning. The angle at which the tines grip the log is always at a right angle, depending on what is needed for a particular application. Angle directly affects the amount of force that the Grapple can apply to pull or push logs.

A steep angle is much stronger than a shallow one, but there are limits. A steep slope won’t work when the Grapple sits on soft ground that will sink into it. However, the optimal angle is highly dependent on soil conditions and the type of timber being handled. In some cases, a log may be too big or too heavy for certain angle settings.

23. How did I know my excavator log grapple is bad?

There are many specific signs to look for that will clue you in on this diagnosis. One of these signs is a slight resistance when lifting the boom, which you would normally not feel if the cylinder were bad. This is just one sign that there might be an issue with the cylinder. Another sign is a grinding noise when moving the boom up and down.

There are many other signs to look for when diagnosing a bad log grapple cylinder. This may be due to loss of pressure, damaged seals, broken valves. If these problems exist, the whole unit requires a complete replacement of the log grapple cylinder assembly, cylinder head pad, valve, and rotor.

24. What are the benefits of excavator log grapples?

There are many benefits of using excavator log grapples. Some are as follows:

• Save labor cost
• Increase productivity
• Decrease time wastage
• You can lift heavy logs without any inconvenience
• Help you clear out sights in a snap