In the production process of excavator and bulldozer track links, various processes can ensure or enhance the quality of the chains. Here are some key processes:

Material Selection: The use of high-quality steel is fundamental to ensuring track links. For example, 35MnBN material is used for the link plates of bulldozer track links and is treated through quenching and tempering to improve its core performance.

Heat Treatment Process: Heat treatment is a critical step for increasing the hardness and wear resistance of the track links. For instance, the link plates undergo medium-frequency quenching to further enhance their wear resistance. Additionally, track links components typically undergo hardening and tempering to ensure proper mechanical properties. 

Precision Machining Technology: Precision machining technology ensures that the dimensions and fit of each track links component are highly accurate, which improves overall durability and stability. For example, all bushings, pins, and forged link plates are processed with precision to ensure tight and accurate assembly dimensions and sealing performance.

Lubrication Technology: Lubrication technology is also crucial in the production of track links. Lubricating the chains with oil reduces friction between the bushings and pins, allowing them to maintain superior wear resistance even in harsh working environments. Furthermore, regular lubrication can extend the lifespan of the chains.

Flaw Detection Process: The flaw detection process for the track links of excavators and bulldozers is an important step in ensuring chain quality. Flaw detection is primarily performed using magnetic particle testing. This non-destructive testing method applies magnetization to the surface of the components, creating a leakage magnetic field in the defect areas, which attracts magnetic particles to form visible magnetic indications that reveal internal or surface defects in the parts, such as cracks or inclusions.

Magnetic particle testing is a commonly used non-destructive testing method, where magnetization is applied to the surface of the parts followed by the application of magnetic particles. Observing the accumulation of particles at defect sites allows for the identification of cracks or other defects in the parts. This method can detect surface and near-surface defects, ensuring the safety and reliability of the equipment.

 

The role of magnetic particle testing is to ensure the quality and safety of the track links. Given the enormous loads that track links endure during use, even the smallest crack or defect can lead to severe mechanical failure or accidents. Therefore, magnetic particle testing can promptly detect and address these potential defects, extending the lifespan of the chains and ensuring the normal operation of the equipment as well as the safety of the operators.

The maintenance and inspection process for the idler of a dozer after adding gear oil primarily includes the following steps:

1. Check Oil Quality and Level: First, it is essential to verify that the added gear oil meets the dozer's specifications and that the oil level is adequate. This step is fundamental and critical, as improper lubrication can lead to severe mechanical damage.

2. Clean and Inspect the idler Shaft: Use sandpaper to remove rust from the surface of the dozer idler shaft and check for any damage in the tip hole. If any damage is found, repairs should be carried out.

3. Align the dozer idler Shaft: Insert one end of the idler shaft into the inspection instrument's turntable hole, and measure the shaft's runout using a dial indicator. If the runout exceeds 2 mm, realignment is necessary.

4. External Maintenance: Inspect all components of the steering system, including the steering wheel, steering mechanism, and operational performance. Also, check for any signs of oil leakage.

5. Internal Maintenance: Conduct a thorough inspection and necessary maintenance of all components within the steering mechanism. This includes checking the gears and other critical parts to ensure they are in good working condition.

6. Observation and Documentation: Throughout the maintenance process, detailed records of all inspections and repairs should be maintained for future reference and further maintenance tasks.

To choose the appropriate track roller materials and designs based on excavator operating conditions, it is essential to first consider the working environment and conditions of the excavator. The working environment typically includes various ground conditions, such as flat surfaces, uneven terrain, sandy soils, and mixed abrasive environments like ores. These conditions impose different requirements on the materials and designs of the track rollers.

Material Selection:

• Wear Resistance: Excavators encounter various hard abrasive particles during operation, such as sand and ore, which can cause wear on the track rollers. Therefore, selecting materials with good wear resistance is crucial. For instance, high-hardness alloy materials or specially treated steels, such as carburized or quenched steels, can be considered.

• Impact Resistance: Excavators face various impacts during operation, such as those caused by uneven ground or falling objects. Thus, the materials for the track rollers need to possess excellent impact resistance. High-strength alloy steels or composite materials can be considered, as these materials can maintain structural integrity while withstanding impacts.

Design Considerations:

• Structural Design: The structural design of the track rollers must take into account the working conditions of the excavator. For large excavators, which operate under more demanding conditions, the track rollers require a more robust structural design, such as reinforced wheel body structures and increased axle strength. Additionally, the welding structure of the track rollers should consider the impacts and alternating loads they will endure, employing more reliable welding methods and materials.

Selecting suitable track roller materials and designs requires a comprehensive consideration of the excavator's working environment and conditions.

The dozer carrier roller and dozer track roller have some similarities and differences in their functions.

Similarities:

• Support Function: Both components play a role in supporting the weight of the bulldozer's. The dozer carrier roller and dozer track roller are both essential parts of the bulldozer's undercarriage system, working together to support the weight of the machine through rolling action.
• Track Movement: They both allow the track to move along the rollers, enabling the bulldozer to walk and steer effectively.

Differences:

• Position and Quantity: The dozer carrier roller is typically located at the rear of the bulldozer track and is fewer in number. In contrast, there are generally more dozer track rollers.
• Structure and Design: The design of the dozer carrier roller is relatively simple, primarily serving to support the weight of the bulldozer and reduce track rolling resistance. The structure of the dozer track roller is more complex, usually consisting of components such as the wheel body, track roller axle, bushings, seals, and end caps. dozer Track rollers can be categorized into single-sided and double-sided types.
• Functional Focus: The primary responsibility of the dozer carrier roller is to reduce track rolling resistance, allowing the track to move smoothly on the ground. Its main function is to support the track from above, maintaining a certain tension, ensuring that the track does not become slack or overly tight during operation. The design of the dozer carrier roller must consider tension adjustments to adapt to different working environments and ground conditions.
  On the other hand, the dozer track roller not only supports weight but also serves to limit lateral slippage of the track and helps maintain stability during turning. The design of the dozer track roller must ensure even ground pressure of the track to reduce sinking in wet and soft soil while also addressing rolling resistance issues.

In bulldozer undercarriage parts, the dozer carrier roller and dozer track roller play important but distinct roles.

The primary function of the carrier roller is to support the upper portion of the track, preventing it from sagging and reducing vertical vibrations. The carrier roller also serves to limit the track's movement, preventing lateral sliding. Typically mounted above the track, the carrier roller uses a cantilever structure to provide support and protection for the track.

On the other hand, the main function of the track roller is to bear the weight of the bulldozer and transfer that weight to the track, allowing it to move smoothly over the ground. Track rollers must withstand significant vertical loads, so they require high strength. They are generally designed with sliding bearings to reduce friction and enhance durability. Additionally, track rollers help minimize sinking when traversing wet or soft soil, thereby improving the stability and passability of the equipment.

In summary, the carrier roller is primarily used to support and limit the vertical movement of the track, while the track roller is mainly responsible for bearing and distributing the weight of the bulldozer, ensuring the stability and durability of the track across various terrains. Although both are essential components of the chassis, they each fulfill different responsibilities and functions.

The choice of materials for the bulldozer carrier roller and track roller significantly impacts their performance. Typically, these components are made from alloy steel, often incorporating wear-resistant materials, and are forged or cast to ensure their durability and wear resistance under high-load working conditions. For example, the materials for the carrier roller are generally 50Mn or 40Mn2, which undergo casting or forging and mechanical processing followed by heat treatment to enhance surface hardness and increase wear resistance.

The design and materials of the track roller not only affect its lifespan and reliability but also directly influence the bulldozer's working efficiency and overall performance. Proper material selection can reduce friction, improve productivity, and minimize downtime. Furthermore, the quality parameters of the track roller, such as nominal diameter, width, material, weight, and pre-tension force, directly impact its lifespan, stability, and working efficiency.

Therefore, selecting high-quality materials combined with advanced manufacturing processes is one of the key factors in ensuring the performance of the bulldozer carrier roller and track roller.

The bulldozer track roller is a crucial component of bulldozers, and cracks or deformations can significantly affect the overall performance of the machine. The impact can be seen in several areas:

Reduced Load-Bearing Capacity: The primary function of the bulldozer track roller is to support the weight of the bulldozer and its operational load. Cracks or deformations can lead to a decrease in load-bearing capacity, which in turn affects the stability and safety of the bulldozer.

Uneven Stress Distribution: Bulldozer track roller endure tremendous alternating impact forces during operation. Cracks or deformations can result in uneven stress distribution, increasing the wear risk for other components, such as track plates and track link assemblies. Additionally, deformations in the track roller may cause an increase in contact stress between the track plates and the rollers, accelerating wear on the track plates.

Poor Lubrication: Cracks or deformations in the bulldozer track roller can compromise its sealing performance, leading to oil leaks that affect lubrication efficiency. Inadequate lubrication can exacerbate wear on the track roller and adjacent components, shortening their service life.

Decreased Operating Performance: Cracks or deformations in the bulldozer track roller can impair the walking performance of the bulldozer, especially during demolition tasks where greater impact forces may exacerbate existing issues. This can potentially prevent the bulldozer from functioning normally under complex working conditions, thereby affecting construction efficiency.

Increased Maintenance Costs: Cracks or deformations in the bulldozer track roller require timely repair or replacement; otherwise, the damage may worsen. Consequently, these defects can lead to higher initial maintenance costs as well as subsequent issues that require additional repairs.

In summary, cracks or deformations in the track roller can have multiple impacts on the overall performance of the bulldozer, including reduced load-bearing capacity, uneven stress distribution, poor lubrication, decreased operating performance, and increased maintenance costs.

In the widely used construction and engineering industries, the quality and reliability of undercarriage parts are crucial. Our factory offers a variety of specifications of undercarriage parts to meet the needs of different types of machinery.

Small undercarriage parts are commonly used in various types of small construction machinery and special vehicles that require excellent off-road performance and stability. Here are some common small equipment and vehicles that may use small undercarriage parts:

• Mini Excavators: Used in tasks such as urban construction, field cultivation, and pipeline construction. They are typically equipped with undercarriage for better stability and maneuverability.

• Compact Loaders: Utilized for various material handling tasks, such as moving earth, gravel, and construction materials on construction sites. They also often use undercarriage.

• Mini Bulldozers: Employed for leveling and grading surfaces in road construction, parking lot development, and small earthmoving projects.

• Compact Agricultural Tractors: Some small agricultural tractors are equipped with undercarriage for better traction in fields without damaging the soil.

• Small Snowmobiles and Off-road Vehicles: In snowy, muddy, or rugged terrains, small undercarriage parts can enhance vehicle stability and traction.

• Gardening and Agricultural Machinery: Small undercarriage parts are also used in some gardening and agricultural machinery, such as plows, seeders, and harvesters, to work in different field conditions.

Additionally, some small robots and robotic vehicles use undercarriage. Undercarriage is particularly useful for robots to move and perform tasks in complex terrains and harsh environments. Here are some examples of small robots using undercarriage:

• Drainage and Sewage Cleaning Robots: Equipped with undercarriage for traversing different terrains like deserts, forests, urban streets, sewers, etc.

• Search and Rescue Robots: In search and rescue missions, small robots can use undercarriage to navigate obstacles and perform tasks.

• Agricultural Robots: Some small agricultural robots are used for planting, weeding, and harvesting crops. They often use undercarriage for mobility.

• Exploration and Mining Robots: In exploration and mining, small robots can be used for surveying, underground mining, and mine clearing. Their undercarriage allows them to move and operate in mining environments.

• Educational and Research Robots: Some small robots designed for educational and research purposes use undercarriage to help researchers and students learn and experiment with robotics technology.

The load-bearing capacity of the undercarriage is generally influenced by various factors, including undercarriage design, material quality, structural strength, etc. Here are some common undercarriage specifications and their general suitability for equipment load ranges:

• 72-Pitch Undercarriage Parts: Typically suitable for micro and mini excavators or compact crawler equipment with a designed load capacity of around 0.8 tons. Suitable for small construction projects, urban construction, and light excavation tasks.

• 90-Pitch Undercarriage Parts: Generally suitable for small crawler equipment with a designed load capacity ranging from 1 ton to 2 tons. Suitable for medium-sized construction projects, earthmoving projects, and general excavation tasks.

• 101-Pitch Undercarriage Parts: Can be suitable for medium to medium-large excavators with a designed load capacity ranging from 3 tons to 6 tons.

• 135-Pitch Undercarriage Parts: Typically suitable for medium-large excavators with a designed load capacity ranging from 8 tons to 12 tons.

• 154-Pitch Undercarriage Parts: Suitable for large excavators with a designed load capacity of 10-12 tons or more.

It's important to note that the above load capacity ranges are for reference only. The specific application will depend on the excavator model, manufacturer requirements, and the specific needs of the project. When selecting undercarriage parts, it is recommended to consult in detail with the excavator manufacturer or supplier to ensure the selection of the most suitable parts for your equipment.

S/N	Car brand	OE No.	Description
1	BMW	66206934308	Park distance sensor
2	BMW	66209196705	Park distance sensor
3	BMW	62609921621	Park distance sensor
4	BMW	66206935598	Park distance sensor
5	BMW	66206935597	Park distance sensor
6	BMW	66202180146	Park distance sensor
7	BMW	66206988965	Park distance sensor
8	BMW	66207837273	Park distance sensor
9	BMW	66209289022	Park distance sensor
10	BMW	66206956746	Park distance sensor
11	BMW	66209140942	Park distance sensor
12	BMW	66200393938	Park distance sensor
13	BMW	66208037843	Park distance sensor
14	BMW	66208046454	Park distance sensor
15	BMW	66206956742	Park distance sensor
16	BMW	66206951674	Park distance sensor
17	BMW	66206989068	Park distance sensor
18	BMW	66200414194	Park distance sensor
19	BMW	66200309542	Park distance sensor
20	BMW	66206911834	Park distance sensor
21	BMW	66202184264	Park distance sensor
22	BMW	66202180149	Park distance sensor
23	BMW	66216938738	Park distance sensor
24	BMW	66206989069	Park distance sensor
25	BMW	66216938739	Park distance sensor
26	BMW	66202184263	Park distance sensor
27	BMW	66206989112	Park distance sensor
28	BMW	66216938737	Park distance sensor
29	BMW	66206989067	Park distance sensor
30	BMW	66206911831	Park distance sensor
31	BMW	66216938737	Park distance sensor
32	BMW	66216902180	Park distance sensor
33	BMW	66216902181	Park distance sensor
34	BMW	66218368727	Park distance sensor
35	BMW	66216902182	Park distance sensor
36	BMW	66218375533	Park distance sensor
37	BMW	66218352137	Park distance sensor
38	BMW	66209139868	Park distance sensor
39	BMW	66209142217	Park distance sensor
40	BMW	66209142212	Park distance sensor
41	BMW	66209231287	Park distance sensor
42	BMW	66202180147	Park distance sensor
43	BMW	66209231284	Park distance sensor
44	BMW	66209270501	Park distance sensor
45	BMW	66209127801	Park distance sensor
46	BMW	66209233031	Park distance sensor
47	BMW	66202180495	Park distance sensor
48	BMW	66209270495	Park distance sensor
49	BMW	66209233037	Park distance sensor
50	BMW	66202151635	Park distance sensor
51	BMW	66209233051	Park distance sensor
52	BMW	66209231281	Park distance sensor
53	BMW	66209231283	Park distance sensor
54	BMW	66209297700	Park distance sensor
55	BMW	66209270050	Park distance sensor
56	BMW	66209270497	Park distance sensor
57	BMW	66209233032	Park distance sensor
58	BMW	66209233047	Park distance sensor
59	BMW	66209270500	Park distance sensor
60	BMW	66209127800	Park distance sensor
61	BMW	66209231286	Park distance sensor
62	BMW	66209139867	Park distance sensor
63	BMW	66209261582	Park distance sensor
64	BMW	66209261587	Park distance sensor
65	BMW	66202220666	Park distance sensor
66	BMW	66209261607	Park distance sensor
67	BMW	66209261612	Park distance sensor
68	BMW	66209274427	Park distance sensor
69	BMW	66207850461	Park distance sensor
70	BMW	66208283754	Park distance sensor
71	BMW	66209270750	Park distance sensor
72	BMW	66202409650	Park distance sensor
73	BMW	66207987047	Park distance sensor
74	BMW	66209283746	Park distance sensor
75	BMW	66209283754	Park distance sensor
76	BMW	66209274428	Park distance sensor
77	BMW	66207850470	Park distance sensor
78	BMW	66209274429	Park distance sensor
79	BMW	66209283202	Park distance sensor

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1	Chrysler	1TK84JSCAA	Park Distance Sensor
2	Chrysler	1TK84TZZAA	Park Distance Sensor
3	Chrysler	1EW63TZZAA	Park Distance Sensor
4	Chrysler	1EW63AXRAA	Park Distance Sensor
5	Chrysler	1EW63TRMAA	Park Distance Sensor
6	Chrysler	5HX08SZ0AB	Park Distance Sensor
7	Chrysler	5HX08TZZAA	Park Distance Sensor
8	Chrysler	1BG52RXFAA	Park Distance Sensor
9	Chrysler	YK91AXRAA	Park Distance Sensor
10	Chrysler	YK91BPKAA	Park Distance Sensor
11	Chrysler	YK91CB6AA	Park Distance Sensor
12	Chrysler	YK91EBLAA	Park Distance Sensor
13	Chrysler	YK91EVJAA	Park Distance Sensor
14	Chrysler	YK91WS2AA	Park Distance Sensor
15	Chrysler	YK91ARHAA	Park Distance Sensor
16	Chrysler	YK91BB8AA	Park Distance Sensor
17	Chrysler	YK91CYGAA	Park Distance Sensor
18	Chrysler	YK91SW1AA	Park Distance Sensor
19	Chrysler	YK91ZBJAA	Park Distance Sensor