Excavator Track Derailment Reasons and Assembly Skills Detailed Explanation
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Excavators can be divided into tracked and wheeled according to the driving mode, of which tracked excavators are particularly popular in rugged terrain and complex environments with their strong off-road capabilities. However, crawler excavators may face the problem of track derailment during use, which not only affects the construction efficiency, but also may cause mechanical damage. This article will analyze the main causes of rail derailment in detail, and provide corresponding assembly techniques to help operators effectively deal with this problem.
the Common Causes of Track Chain Derailment
Mechanical Wear
In the long-term operation of excavators, due to machining or assembly problems, the main parts bear too much load, and with the increase of use time, the key parts are easy to wear, and eventually lead to the derailment of the track chain.Tension Cylinder
If the tensioning cylinder of the track fails, it can cause the track to become too loose, which increases the risk of derailment.Improper Adjustment of Idlers and Supports
When the adjustment between the idler and the support is not appropriate, the force of the track in the running process is not uniform, which may cause derailment.Long Hours on Rocky Roads
Walking on rocks for a long time, the track is subjected to uneven pressure, which can cause the track pin to break and the chain to wear, which can lead to derailment.Foreign Body Interference and Improper Operation
If there is a foreign body between the roller and the rail frame, or the operator does not operate properly during driving, the track may be stressed unevenly, resulting in fracture or derailment.Track Chain Assembly Skills
Track chain shedding is a common problem in excavator operation, especially after prolonged use. For inexperienced operators, the face of the track chain is often at a loss. Here are some practical assembly tips that can help reduce the occurrence of track chain shedding and resolve the problem quickly.Prepare for Preassembly
Shutdown Processing
When it is found that there is a problem with the track chain, it is necessary to inform the construction party immediately, and stop processing in time to avoid the expansion of the problem.Environmental Assessment
Judge the environment around the machine, and try to choose a hard site for operation after the track falls off. The excavator bucket can be used to maintain a range of rotating tracks around dirt or other obstacles to reduce the risk of further damage.Judging the Degree of Derailment
Determine the extent of track loss. If the track falls off due to damage or other faults, the repair personnel should be notified in time for handling. At the same time, check whether there is a lot of sand or debris in the track, and clean it up in time if necessary. These foreign bodies are easy to cause derailment in the course of steering operation, especially in the case of serious wear of the rail link and large clearance.Assembly Method of Track
Method I: Decomposition and Assembly
First turn the chain pin to the end of the middle height of the two ends, then knock it out so that the tracks are laid flat in a row. Then, the excavator travels one-way to the top of the track to complete the reassembly of the track.Method II: Crowbar Assistance
Use a crowbar to assist the track plate in position. Place the crowbar under the track to support the machine in turning the track. At this time, someone in the cab controls the excavator and at the same time lifts the track to turn it forward. Through the top roller to the position of the roller, objects can be placed at the roller, and the two sides of the track docking, complete the assembly of the pin.Excavator Track Adjustment Precautions
In order to extend the service life of the excavator, the operator should adjust the tension of the track in time according to the different construction environment. The following are adjustment suggestions for different working conditions:A Pebbly Floor
On the ground covered with pebbles, the track should be adjusted slightly loosely to avoid bending the track plate due to excessive pressure and reduce mechanical losses.Soft Soil
In soft soil, the track should be adjusted loosely to prevent soil adhesion from causing abnormal pressure, thereby protecting the track link.
Solid, Flat Ground
On solid, flat ground, the track should be tightened to improve the stability of the track contact with the ground and avoid damage to the frame.
