Shantui SD22 Buldozer's support rollers original

Structural composition: consists of a wheel housing, a wheel shaft, a sleeve, a sealing ring, a end cover and other parts.

Classification of types: can be divided into one -sided support wheels and double -sided support wheels.

Properties of the material: The wheel housing is usually made of 40MN material. The surface of the rim is usually hardened, and hardness can reach 355–440HB.

The main functions: bulldozer weight support and uniform weight distribution on a caterpillar plate; the support on the clone of the clip for the clamp of the caterpillar chain to prevent the side sliding of the caterpillar and ensure the rectilinear movement of the bulldozer along the direction of the caterpillar; Ensuring the smooth rolling of the caterpillar on its surface, a decrease in the resistance of friction between the caterpillar and the ground and ensuring the smooth movement of the bulldozer.

Product parameters: if you take as an example, common models, then the number of the drawing wheel of the TY160-type support wheel-16Y-40-1000, length-401.2 mm, weight-61 kg; The number of the type TY220-155-30-00114, length-498.5 mm, weight-81 kg; The drawing number of the type TY320-175-30-00496, length-504.3 mm, weight-127 kg.

Installation method

Preparation: Make sure that the bulldozer is stopped and is in a safe state, and disconnect the negative terminal terminal to prevent random launch. Prepare the necessary tools, such as wrenches, heads, calipers, lifting equipment, etc., as well as new support wheels, shafts, seals, lubricants, bolts and nuts and other accessories.

Disassemble the old support rollers: remove the end lids or protective devices from both ends of the support rollers, loosen the bolts or nuts, fasten the shafts of the support rollers, pull the shafts of the support rollers from the wheel housing and the frame of the cart, remove the old support rollers and the corresponding sealing rings, sleeve and other Components.

Installing new videos

Install the sleeve and sealing ring: apply the required amount of grease to the shaft of the support roller, install a new sleeve for the shaft and make sure that the sleeve is installed in place. Install a new sealing ring in the sealing groove of the wheel housing, making sure that the sealing ring is installed smoothly, without distortions, deformations and damage.

Install the support rollers: use the lifting device to raise new support rollers, combine the holes of the shaft of the support roller with the mounted holes on the trolley frame, slowly insert the shafts of the support rollers, and then install the fixing bolts or nuts, but do not tighten them.

Adjusting and tightening: Use tools such as a caliper to check the gap when installing the support rollers and make sure that it meets the requirements of the equipment. Using a wrench or dynamometric key, evenly tighten the fixing bolts or nuts to the specified torque value.

Install the end plugs: install the end plugs or protective devices on both ends of the support rollers, making sure that they are securely fixed.

Check and test: after installation, check whether the support rollers are reliably installed, whether they are easy to rotate, if there is no seal or abnormal resistance. Run the bulldozer and conduct the test at a short distance to observe the operation of the support wheels.

Precautions when using

Avoid harsh operation: avoid sharp braking, sharp turns or frequent clashes with obstacles when moving a bulldozer, reduce the instantaneous power of the blow to the support wheels and do not allow damage to the components such as the wheel, the shaft and bearings, due to overload.

Prevent clogging with dirt: regularly clean the support wheels of dirt, stones and other garbage, especially after working in dirty, dusty and other harsh conditions to prevent dirt from entering the wheel housing, which can affect rotation and lead to wear.

Control the working environment: try to avoid immersing the support rollers into the water or in an extremely cold environment for a long time. After work in winter, moisture should be removed in a timely manner from the surface of the support rollers so that the water does not freeze and does not damage the seals.

Regular inspection and maintenance: regularly check the wear of the support wheels, including the wheel surface, wheel rim, shaft and bearings. If wear exceeds the specified limit, it should be replaced in time. At the same time, check if the bolts and nuts of the support wheels are weakened. If they are weakened, tighten them in a timely manner.

The common faults of the caterpillar wheels of Shantui bulldozers include wear, oil leak, jamming, breakdown, etc. Below are specific phenomena of malfunctions, causes and solutions:

Wear

Falf: on the surface of the support wheel, rim of the wheel or neck of the axis, explicit wear occurs, as a result of which the wheel diameter decreases, and the wheel rim becomes thinner, which affects the normal use of the support wheel and the stability of the bulldozer movement.

Cause

Long work at high loads: during the operation of the bulldozer, the caterpillar wheels carry the weight of the entire machine and various complex loads. Long work at high loads will accelerate the wear of the wheel housing.

Severe working conditions: when working in dusty, dirty, sandy and other harsh conditions, dust, sand and other particles can easily enter the space between wheels and caterpillars, which exacerbates wear.

Incorrect adjustment of the caterpillars: too stretched or too weakened caterpillars will cause uneven force on the support wheels, which will lead to increased local wear.

Bypass

Choose suitable working conditions: reasonably distribute the working tasks of the bulldozer to avoid prolonged continuous work in difficult working conditions and at high loads. You can organize the appropriate intervals to allow the equipment to relax.

Improve the working environment: if the conditions allow, carefully align and clean the working area to reduce the effects of dust, sand and other garbage on the support wheels.

Adjust the caterpillar: regularly check and adjust the caterpillar tension to maintain it in the corresponding range. Typically, sagging a caterpillar should be in the indicated range of 50-70 mm.

Timely replacement: if wear exceeds the specified limit, for example, wear of the wheel diameter exceeds 5% of the original diameter or wear of the rim thickness exceeds 30% of the initial thickness, the support wheels should be replaced in a timely manner.

Oil leak

A sign of a malfunction: a leakage of lubricating oil from under the sealing ring or end cover of the support wheel, which leads to insufficient lubrication inside the support wheel and pollution of the track and the workplace.

Cause

Acting or damage to the sealing ring: after prolonged use of the support rink, the sealing ring loses its sealing properties due to aging, deformation, wear, etc., which leads to a leakage of lubricating oil.

Incorrect installation: When installing the support rollers, the sealing ring is installed unevenly, twisted or not installed in place, which can lead to oil leak during operation.

Damage to the wheel or shaft case: cracks, wear on the wheel housing or shaft of the support wheel will destroy the sealing structure and lead to the leakage of the oil.

Bypass

Replace the sealing ring: regularly check the condition of the sealing ring and replace any old or damaged sealing ring in a timely manner. When replacing, choose sealing rings of the corresponding quality and technical characteristics, and also make sure that they are installed correctly.

Repeated installation: If the oil leak is caused by the incorrect installation, it is necessary to disassemble the support rink and reinstall the seal and other parts, following the correct method and sequence of actions.

Repair or replacement of the wheel and shaft housing: check the wheel and shaft housing. If there are cracks or severe wear, they should be replaced or replaced on time to restore the tightness of the support wheel.

Stuck

The phenomenon of the malfunction: the support wheels get stuck and become inflexible during rotation. In severe cases, they can not even rotate, which affects the movement of the bulldozer.

Cause

Flowing with garbage: dirt, sand and other garbage fall into the caterpillar wheel, blocking the gap between the wheel housing and the shaft, which leads to poor rotation.

Damage to the bearings: after prolonged use, the bearing of the support rollers can be damaged due to wear, fatigue and detachment, which will lead to the stuck of the wheel during rotation.

Dear wear or deformation: the tsappfa rink is worn out or deformed, which leads to a decrease or uneven clearance between the support roller and the wheel housing, which leads to jamming.

Bypass

Garbage cleaning: clean the garbage in a timely manner inside and around the support wheels. You can use a high -pressure water pistol or compressed air to rinse and blow them to make sure that the rotating part of the wheel is clean.

Replace the bearings: check the condition of the bearings. If they are damaged, replace them with new ones in time. When replacing bearings, pay attention to the choice of a suitable bearing model and provide the correct installation.

Repair or replacement of the shaft: check and measure the neck. If wear or deformation is insignificant, it can be repaired; If the damage is serious, it is necessary to replace the shaft with a new one.

fracture

Fault: Cracks or even breakdowns appear on the wheel or axis of the support wheel, as a result of which the support wheel ceases to work normally, which seriously affects the stability and safety of the bulldozer.

Cause

The problem with the material: the quality of the supporting wheel material is unsatisfactory, there are internal defects, such as inclusions and pores that can easily break at a large load.

Overload or blow: During the operation of the bulldozer, the support wheels are subjected to excessive shock load, for example, a clash with obstacles, a fall from a height, etc., which exceeds the bearing capacity of the support wheels.

Strength damage: long -term repeated loads cause fatigue cracks in the material of the support wheel. Over time, cracks gradually expand and ultimately lead to breakdown.

Bypass

Choose high -quality products: when buying support videos, choose products from manufacturers with reliable quality and good reputation, and also make sure that the material and process of manufacturing support rollers meet the requirements.

Standardized operation: Operators must strictly comply with working procedures in order to avoid accidents such as holler clashes, and reduce the effect on the support wheels.

Regular inspection: Strengthen the daily inspection of support rollers to quickly detect hidden dangers, such as cracks on the wheel and axis housing. Supporting rollers with cracks should be immediately replaced to prevent breakdowns.