Shantui SD22 Caterpillar shoe assembled

Detailed product information

Components: usually consist of high plates, links of caterpillar, fingers of caterpillar, fingers, dust -gathering rings and caterpillar bolts.

Characteristics of the material: each component is usually made of high -quality alloy steel and undergoes heat treatment, has good wear resistance and impact resistance.

The principle of operation: to transfer the weight of the bulldozer to Earth so that the bulldozer has sufficient grip with the ground. When rotating the stars of her teeth, they are engaged with the sleeve of the finger of the caterpillar chain, setting the caterpillar in motion, and the bulldozer moves along the caterpillar consisting of segments of the caterpillar chain through the support wheels.

Installation method

Preparation before installation: Prepare tools such as a jack, wrench, pliers, screwdriver and a new guide assembly. Make sure that the construction site is dry, even and has no visible obstacles. Clean the bulldozer, especially caterpillars, from dirt, oil, etc.

Remove the old caterpillar: use the jack to raise the equipment, weaken the stretch of the caterpillar, and then use the tools to remove the connecting bolts and other parts of the old caterpillar and remove the old caterpillar.

Install a new caterpillar: set the new caterpillar in the appropriate position so that the holes in the caterpillar correspond to the installation positions of stars, support rollers, etc. Set the connecting parts of the caterpillars, such as the pins of the caterpillars, and make sure that the compound is reliable. Put on a caterpillar on a star, support wheels and other parts and gradually adjust the position of the caterpillar to ensure the correct installation.

Adjust the tension: use the caterpillar tension device to adjust the trace of the caterpillar so that the caterpillar reaches the appropriate tension state. As a rule, the sagging of the caterpillar can be measured in accordance with the machine operating manual to determine whether the tension is appropriate.

Check and trial launch: after installation, check whether all the connecting parts are tightened and whether the direction of installation of the caterpillar tape is installed correctly. Launch a bulldozer and conduct a short distance test to check the smoothness of the caterpillars and the absence of extraneous noise or seizures.

Precautions when using

Verification of tension: regularly check the trace of the caterpillar to make sure that sagging the left and right caterpillar is the same. When working on a flat and solid surface, it can be tightened more; When working on a clay or soft surface, it should be tightened weaker.

Operational characteristics: When managing a bulldozer, your movements should be smooth. Do not rush and do not crash into anything when working on uneven areas. Do not turn at high speed or in place while driving. Do not turn abruptly when moving in reversing, so as not to damage the path or not get off the rails.

Avoid overload: do not overload the car in uneven or inclined areas to prevent the car forward and prevent the idle stroke of caterpillar ribbons at high speed, which will lead to the rapid wear of the components of the chassis.

Traveling through special areas: when traveling through a railway crossing, the direction of the car must be perpendicular to the rails. It is not allowed to change speed, stopping or reversing along the rails in order to avoid stiring the rails in the rails and the occurrence of large traffic accidents.

Cleaning and maintenance: after the end of the operation, the caterpillar should be cleaned of dirt, weeds or wires; Check if the fingers of the caterpillar are moving or whether they are weakened, whether there are cracks in the joints of the caterpillar and whether the shoes of the caterpillar are damaged. If necessary, brew or replace them.

Common malfunctions and solutions

The sagging of the path

The reasons for the failure: a malfunction of the caterpillar tension, wear of a caterpillar, a leak from a stretch cylinder, etc.

Solution: Check the caterpillar tension device and, if necessary, adjust the tension of the caterpillar; If the caterpillar is very worn out, replace it in a timely manner; Check the stretch cylinder and the pipeline, if there is a leak, repair or replace the appropriate parts.

Wear of caterpillars

Causes of failure: long -term operation in harsh conditions, improper operation, problems with the quality of the track, etc.

Solution: improve the working environment and try to avoid working in places with a large number of sharp objects or high hardness; standardize operations and avoid sharp acceleration, sharp braking and prolonged turning in place; Choose caterpillar products of reliable quality; In time, replace the strongly worn caterpillar plates or links of the chain.

Rails gathering

The reasons for the failure: improper tension of the caterpillars, damaged elements of the running mechanism, an uneven workplace or obstacle, etc.

Solution: adjust the tension of the track to the desired state; Check the support wheels, drive wheels, drive wheels and other parts of the walking mechanism and replace them in a timely manner in case of damage; Level the work site and eliminate the obstacles; If the path has come off the rails, reinstall the path in the right direction.

Abnormal noise from the path

The reasons for the failure: weakening of the fastening of the elements of the caterpillar, poor lubrication, the entering foreign objects into the caterpillar, etc.

Solution: Check the connecting caterpillar bolts, caterpillar fingers and other details, tighten the weakened details; Lubricate the rotating parts of the caterpillars and connecting parts; Clean the caterpillar of foreign objects, such as dirt, stones, etc.

Below are some real cases of common malfunctions of the SHANTUI caterpillar nodes and ways to eliminate them:

Rails gathering

Case: When the Shantui bulldozer performed earthworks at the construction site, its caterpillars suddenly left the rails after traveling along a relatively uneven road with a large number of stones.

Analysis of the cause: on the one hand, the tension of the caterpillar was not adjusted properly before operation and was relatively weak; On the other hand, stones on the uneven surface of the road created a large side strike on a caterpillar, which led to it immediately from the guide and support wheel.

Solution: First, remove the obstacles, such as stones, around the rails, then with the help of a jack, raise one side of the bulldozer and tear off the caterpillars from the ground. Using the stretch device of the caterpillar, pull it to the desired degree, then manually slowly set the caterpillar on the guide and support wheels, then lower the jack, run the bulldozer to a short test distance and check if the caterpillar is reliably installed.

Breakable pin of the caterpillar

Case: on the construction site of the mining company after the Shantui bulldozer continuously worked with high intensity for several days, the operator heard an unusual noise emanating from the caterpillar. After stopping the car for the inspection, it was discovered that the finger of the caterpillar was broken.

Analysis of the reasons: after the examination, it was found that the finger of the caterpillar for a long time worked in high load and high friction conditions, and some impurities, such as slag, fell into the caterpillar, which was aggravated by wear and ultimately led to the fatigue destruction of the track’s finger.

Solution: First, park the bulldozer on a flat and safe platform, then use the tools to remove the caterpillar section, in which there is a broken back of the caterpillar. Clean the holes for the fingers of the caterpillars from dirt and debris, replace the fingers of the caterpillars, the corresponding bushings and other details with new ones and make sure that they are reliably installed. After installation, carefully inspect the entire caterpillar to make sure that there are no potential problems with other fingers and components of the caterpillar.

Uneven wear of shoes of caterpillars

Case: in the municipal project, when the Shantui bulldozer performed work to align the road, the operator found that the bulldozer was moving off the rails. During the examination, it was found that the shoes of the caterpillars were strongly and unevenly worn out.

Analysis of the reasons: After the inspection, it was established that the position of the installation of the support wheel was rejected, which led to an uneven effort on the caterpillar during operation, which caused uneven wear of the trace of the caterpillar. In addition, soil conditions on the work site also have a certain influence. The soil on the one hand is relatively soft, and on the other, it is more solid, which also exacerbates uneven wear.

Solution: First, adjust the position of the installation of the support wheel to restore its correct position and ensure uniform load on the caterpillar. Replace the strongly worn shoes of caterpillars. In subsequent work, try to level the working site to avoid uneven wear of shoes of caterpillars due to large differences in the soil state.