How to Remove Final Drive from Excavator?

How to Remove Final Drive from Excavator

The final drive of an excavator is one of the most important mechanical components of the machine. An excavator final drive is a mechanism that drives a track base of a bulldozer or an excavator to move forward and backward on the ground.

excavator final drive

An excavator final drive is a complex mechanism containing planetary gears, bevel gears, etc. Usually made of cast iron or steel, it’s designed to have an enclosed gear case to protect the inner workings from dirt and debris.

 

The working principle of the final excavator drive includes the movement of planetary gears, which reduces speed and meanwhile increases the torque. This will cause the sprocket lies within tracks to rotate. Doing this will allow you to move your excavator in any direction you want.

Because a worn-out, damaged, or seized final drive will damage your excavator’s engine and transmission – and can even put your life, and those of others, at risk! It is necessary to maintain your excavator’s final drive to carry out the optimum function.

Follow our simple step-by-step guide to learn how to remove your excavator’s final drive and prepare it for service, repair, or replacement.

Why Remove Final Drive from Your Excavator

why remove your excavator final drive

 

There are several reasons to remove your excavator’s final drive from your excavator. Some of the main reasons include:

 

  • Failure of the bearings located inside your excavator final drive
  • Leakage of oil from your excavator final drive
  • Due to continuous usage of your excavator final drive sprocket may become loose
  • The gears inside the final drive may suffer from worn-out teeth because of overloading or continuous heavy-duty working
  • The main problems associated with excavator final drives are overheating and excessive noise. The temperature of the lubricant is the major issue you will find to determine if the drive has proper oil flow.

If the temperature increases, you will see drops in torque. This may be caused by an internal seal breakdown within the final drive.

  • Failure of your excavator final drive or pinion shaft renders your excavator final drive out of operation.

The excavator final drive is the most important part of the whole construction site. It can directly affect the productivity and efficiency of your equipment.

But when it gets damaged during the operation, the machine will be out of order for some time.

To avoid the downtime of your excavator final drive, you need to remove it for either repair or replacement, or service.

The process to Remove the Final Drive from Excavator

 

Carrying a defective or non-functioning final drive from your excavator to the repair shop can be an annoying task. Usually, you have to remove it from under the machine, and that job is not as simple as it sounds.

The steps included in removing your excavator final drive are as follows:

  • First, arrange a tool kit for yourself because the tool kit will assist you in carrying out a successful operation.
  • You can remove the final excavator drive either by yourself or by hiring professional assistance.
  • At first, remove the tracks from your excavator undercarriage; you can do this by putting a screw jack under your excavator and lifting it from the ground.
  • You need to remove the nut and bolts from your excavator sprocket. Doing this will lose it. Then you need to remove the guard plate against rocks from the final drive motor side.
  • The final drive is heavy-duty equipment. It is not easier to remove. The thing you need to do is to place a jack or to make use of another excavator to get your final drive removed.
  • While removing your excavator final drive, use some ink or colors to mark their exact location. This will help you when installing your final excavator drive. While you are doing this, make sure to cover the hoses by putting the ports to prevent them from contamination. This will increase the efficiency and effectiveness of your excavator final drive.
  • After doing all of the above, as mentioned, you can move further, and now the thing you have to do is remove the mountings from the frames and pull your final drive out.

By doing this, you can get your excavator’s final drive at ease in no time.

 

Failure of Excavator Final Drive

excavator final drive failure

The various kinds of failure of the excavator’s final drive are generally induced by particles (sandy, gravel, stone, etc.) in its surrounding soil or the site on which it is working.

 

Some of the main causes of failure of excavator final drive are as follows:

  • Three main reasons for failure, including the synchronization ring, the wormhole axial displacement, bearing failure.
  • In some cases, it may cause breakdowns of excavator final drive due to the overload from the machine body, kernel rust of gears, some errors occurred during installation, etc.
  • The abnormal operation of the excavator or because of the mechanical failure of the pinion tooth or tooth bracket, causing loose movement.

Knowing the causes of Final drive failure enables a technician to predict the remaining time to failure more accurately. This knowledge can increase profits, reduce downtime and extend the life of excavators” components.

 

Avoid Removal of Excavator Final Drive

Many mechanical components of the excavator require regular maintenance and must be replaced at a certain frequency. You have to understand the maintenance schedule to extend the life of the excavator final drive.

 

You need to follow the following maintenance requirements to upkeep your excavator’s final drive.

  • The maintenance requirement of the excavator final drive is dependent on the kind of lubricating oil used. Generally, if using oil with 210±20 points Viscosity Index (VI) and single-grade engine oil, the interval of lubricating is 500-800 hours; if using oil with 185±20 points VI and double grade engine oil, the interval is 500-1500 hours; if using oil with 200±20 points VI and three-grade engine oil, the interval is 300-700 hours. The intervals are different for different oils.
  • Cleaning of Excavator Final Drive is very important. Remove the dirt, sand, or fine dust from these parts to keep them working effectively.
  • The grease of the axle transmission of the Excavator Final Drive plays an important role in the lubrication and cooling of all moving parts of it. For this reason, the grease of the axle transmission of the Excavator Final Drive must be changed regularly.
  • Check all bolts for tightness; if there exist some loose bolts, then tighten them up to an optimum amount of torque. This will prevent unpleasant sounds or vibrations.
  • The excavator operator should complete a total repair overhaul of the noticeable parts once each year to prevent possible breakdowns. You must disassemble the engine oil, change main bearings and pinions. Make sure to perform repairs on both sprocket shafts.

Conclusion

 

The Excavator Final Drive lets you run uninterrupted without having to stop. You can get the job done faster without any downtime. When your excavator or shovel, or dozer gets stuck, chances are it’s because it has a broken final drive.

The appearance of a cracked or leaking Excavator Final Drive casting is a sight no Excavator operator wants to see. When an Excavator Final Drive leaks, you must repair or replace the drive to prevent bearings, seals, and gear damages.

To do this, you need to remove your excavator final drive. This will help you increase your productivity and maintain your efficiency of work.

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