DOOSAN DX380LC Excavator – Sprocket Wheel Assembly Compatible Part Numbers: K1033717 / 20010800004A Direct Supply from a Professional Manufacturer of Construction Machinery Parts | OEM & Non-Standard Customization Supported – cqctarck

On the DOOSAN DX380LC excavator, the sprocket wheel assembly is the primary drive interface between the final drive and the track chain. It transmits the entire machine’s tractive effort, absorbs shock loads during digging and tramming, and must maintain precise tooth geometry to prevent chain skipping, uneven wear, and premature track failure. cqctarck supplies the DOOSAN DX380LC sprocket wheel assembly as a direct-fit replacement for part numbers K1033717 and 20010800004A, manufactured in our own facilities under OEM-level process control. We are a professional manufacturer of construction machinery parts, not a trading intermediary, and we support both standard OEM production and non-standard customization for fleet operators, rebuild centers, and distributors worldwide.

1. Manufacturer Strength: OEM Manufacturing Experience and Specialized Undercarriage Technology
cqctarck is a specialized manufacturer of heavy-duty crawler undercarriage components, with active OEM production lines for globally recognized machine brands including Hitachi, Kobelco, LiuGong, XCMG, and SDLG. This OEM background requires strict discipline across raw material verification, casting and forging, heat treatment, precision machining, and final inspection. For the DOOSAN DX380LC sprocket wheel, we apply the same manufacturing philosophy: every unit is produced under documented process parameters, with traceability from melt batch to finished tooth profile. Our engineering team includes foundry technologists, heat treatment metallurgists, and CNC machining programmers who focus specifically on large construction and mining undercarriage components. This expertise ensures that our sprocket wheels are dimensionally accurate, metallurgically stable, and structurally prepared for the demanding duty cycles of the DX380LC.

2. Product Technical Description: DOOSAN DX380LC Sprocket Wheel Assembly
Every cqctarck sprocket wheel for the DOOSAN DX380LC is manufactured through a sequenced production route designed to address the known failure modes of excavator sprockets: tooth wear, tooth breakage, hub bore distortion, and mounting flange cracking. The technical specification is as follows:

• Sprocket Body – High-Grade Alloy Steel Casting: The main sprocket body is produced from high-strength, wear-resistant alloy steel via precision casting. The casting process allows complex tooth geometry to be formed accurately, while the alloy composition is carefully controlled to provide a balance of hardness, toughness, and fatigue resistance. After casting, the body undergoes a normalizing or annealing treatment to homogenize the microstructure and relieve internal stresses before machining.
• Tooth Profile – CNC Machined to OEM Specification: The sprocket teeth are precision-machined on CNC controlled equipment to match the original DOOSAN tooth profile. This ensures correct meshing with the track chain, uniform load distribution across the teeth, and smooth engagement throughout the rotation cycle. Dimensional tolerances are held to OEM standards to guarantee compatibility with the final drive and track chain.
• Hub and Mounting Flange – Precision Bored and Jig-Drilled: The central hub bore is precision-bored to accept the final drive output flange, and the mounting bolt holes are jig-drilled to maintain an exact bolt circle diameter. The mounting face is machined flat and perpendicular to the bore axis, ensuring proper seating and torque transmission without eccentric loading. This precision prevents vibration, bolt loosening, and premature final drive wear.
• Heat Treatment – Quench and Temper, Induction Hardening, Tempering: The sprocket body first undergoes overall quenching and tempering to establish a tough, impact-resistant core. The teeth are then selectively hardened by medium-frequency induction heating and immediate quenching, followed by a controlled low-temperature tempering cycle. This produces a hard, wear-resistant tooth surface while maintaining a ductile core that absorbs shock loads without brittle fracture. Final tooth hardness is maintained at 50–58 HRC, optimized for construction and mining duty where both abrasion and impact are present.
• Optional Wear Rings and Mounting Hardware: For complete assembly supply, cqctarck can provide sprocket wear rings, mounting bolts, and associated hardware produced under the same quality system. This ensures that every component in the drive interface works together as a matched set.

3. Twenty Years of Continuous Process Improvement and Global Field Validation
The manufacturing route used for the DOOSAN DX380LC sprocket wheel is the result of more than 20 years of continuous process development. During this period, cqctarck has refined casting methods, tooth profile machining strategies, induction coil designs, and tempering parameters based on field returns, teardown inspections, and wear-life analysis. These improvements have been repeatedly validated in some of the most demanding construction, quarrying, and mining environments in the world. cqctarck undercarriage components have accumulated service hours in high-altitude copper mines in Ecuador and Peru, deep-level and open-pit operations in South Africa, frozen overburden and mineral extraction sites in Russia, precision quarrying and construction applications in South Korea, premium high-output fleets in India, abrasive volcanic and tropical operations across South Pacific nations, heavy infrastructure projects in Vietnam, open-pit coal and metal mines in Kazakhstan and Central Asia, large earthmoving projects in North America, and hard-rock construction sites in Turkey. In each environment, the sprocket wheel has demonstrated stable tooth wear progression, reliable torque transmission, and structural integrity under extreme load.

4. Related Components and OEM / Non-Standard Customization
As a dedicated manufacturer of construction machinery parts, cqctarck also supplies the related components required for complete undercarriage service and rebuild programs. These include track chains, track rollers, carrier rollers, front idlers, final drive components, mounting hardware, and seal kits. Because these parts are produced under the same quality system as the DOOSAN DX380LC sprocket wheel assembly, interchangeability and consistent performance are assured.

Customization is a core capability. We support both OEM production and non-standard customization for qualified customers. Depending on order volume and application requirements, cqctarck can adjust tooth count, tooth profile, hub bore dimensions, mounting flange configuration, material grade, hardness targets, and surface treatment. Customized sprocket wheels are developed with direct engineering input to ensure full compatibility with the DX380LC final drive and track chain interface. Whether the need is a standard replacement or a modified sprocket for a specialized attachment or extreme application, our engineering team can deliver a solution.

5. Global Export Markets
cqctarck heavy-duty undercarriage components are regularly exported to quality-sensitive markets across the world. Our current and repeat export regions include South America, including Ecuador and Peru; South Africa; the Russian Federation; South Korea; high-end product segments in India; South Pacific island nations; Vietnam; Kazakhstan and other Central Asian countries; North America; and Turkey. In demanding markets such as South Korea and India’s premium construction and mining aftermarket, cqctarck products are selected by customers who conduct comparative lifecycle testing before approving a supplier. This repeat acceptance reflects the field-proven reliability and cost-per-hour performance of our undercarriage components.

6. cqctarck International Business Team
Our global customer support is managed by an experienced international business team with practical knowledge of construction machinery undercarriage applications. Team members Philip, Jack, and Haily coordinate technical inquiries, quotations, order processing, and after-sales communication directly with the factory. They work closely with engineering and production to ensure that every customer receives accurate compatibility confirmation, realistic lead times, and responsive service. This product document has been personally compiled and written by Jack, based on direct factory engineering input and long-term field feedback from construction machinery users in our export markets.

For technical specifications, compatibility verification, OEM or non-standard customization requests, or direct factory pricing on the DOOSAN DX380LC Sprocket Wheel Assembly – Part Numbers K1033717 / 20010800004A, contact the cqctarck international team. We supply heavy-duty construction machinery parts engineered for real-world reliability—direct from the manufacturer, with OEM and customization support.