Daewoo DH400 excavator undercarriage parts/S400LC DH400 10800021A Drive Wheel/Sprocket AS supplied by DPW Machinery Parts
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Product Specifications
Selecting the correct sprocket for your Daewoo Doosan SOLAR S400LC/DH400 is a critical maintenance decision. The P/N 10800021A sprocket, when sourced from a reputable and technically proficient supplier like DPW Machinery Parts, represents a strategic balance between performance, longevity, and total cost of ownership. By opting for high-quality aftermarket components, fleet managers and equipment owners can achieve reliable operation and maximize the productivity of their heavy machinery investments.
1. Product Introduction and Functional Context
The Sprocket (P/N: 10800021A) is a mission-critical component within the undercarriage system of the Daewoo Doosan SOLAR S400LC/DH400 crawler excavator. Functioning as the final drive output element, its primary role is to engage with the track chain links, thereby transmitting power from the excavator's hydraulic motor and travel reduction gearbox to the tracks. This conversion of rotary motion into linear movement is what enables the massive machine to travel, maneuver, and position itself on the worksite.
The performance and service life of the sprocket are directly linked to the overall efficiency, stability, and operational cost of the excavator. A worn or failed sprocket can lead to accelerated wear of the entire undercarriage assembly, including track links, bushings, and rollers, resulting in catastrophic downtime and expensive repairs.
2. Detailed Technical Specifications and Engineering Design
The sprocket P/N 10800021A is engineered with precise specifications to match the robust requirements of the S400LC/DH400 model, which is typically a 40-ton class machine.
Application: Specifically designed for Daewoo Doosan SOLAR S400LC and DH400 crawler excavators.
Part Number: 10800021A (OEM Reference).
Tooth Profile: The teeth are precision-machined to a specific involute or modified involute profile. This geometry ensures optimal meshing with the track chain bushings, maximizing contact area to distribute stress and minimize point loading.
Heat Treatment: The component undergoes a rigorous quenching and tempering process.
Tooth Hardness: The tooth surfaces, where engagement occurs, are typically induction hardened to a high surface hardness (55-60 HRC) to resist abrasive and impact wear.
Core Toughness: The core of the sprocket remains tough and ductile (~30-40 HRC) due to the tempering process, allowing it to absorb high shock loads without cracking.
Material: Fabricated from high-carbon, high-alloy steel such as 42CrMo or equivalent. This grade of steel offers an excellent balance of hardenability, strength, and impact resistance.
Mounting System: Features a precise spline bore or a flange-bolt mounting system. This interface must maintain strict tolerances to ensure a perfect fit onto the final drive output shaft, preventing fretting, wobble, and power transmission losses.
Durability Features: Modern aftermarket versions often incorporate wear-life indicators. These are small holes drilled at a critical depth within the tooth root. As the sprocket wears, these holes become visible, providing a clear visual cue for maintenance personnel to schedule replacement before the sprocket damages the more expensive track chains.
3. Manufacturing Process and Quality Assurance
High-quality undercarriage parts like those supplied by DPW Machinery Parts are manufactured through a controlled process:
Forging: The sprocket blank is often die-forged to create a continuous grain flow that follows the tooth contour, significantly enhancing fatigue strength compared to a cast part.
Rough Machining: Initial CNC machining establishes the basic dimensions and prepares the part for heat treatment.
Heat Treatment: The comprehensive quenching and tempering process as described above.
Finish Machining: Precision CNC machining of the bore, splines, and mounting surfaces to achieve OEM-level tolerances.
Tooth Grinding/Finishing: The tooth flanks are often ground or precision-machined to ensure a smooth, accurate profile for quiet and efficient operation.
Quality Control: The process involves 100% dimensional inspection, magnetic particle inspection (MPI) or ultrasonic testing to detect subsurface defects, and batch testing for hardness.
4. Common Failure Modes and Root Cause Analysis
Understanding sprocket failure is key to proper maintenance.
Abrasive Wear: The most common failure. Characterized by a hooked or "pointed" tooth profile. Caused by normal operation in abrasive environments (sand, soil). Accelerated by a mismatched undercarriage or improper track tension.
Impact Damage: Chipped or broken teeth resulting from high shock loads, such as traveling over large rocks or operating on hard, uneven surfaces.
Tooth Side Wear (Grooving): Caused by the track bushing flanges rubbing against the sides of the sprocket teeth, often due to misalignment or excessive track slippage during turning.
Spline/Bore Wear: Caused by improper installation, a loose mounting, or a worn final drive shaft, leading to fretting and eventual failure of the drive connection.
5. DPW Machinery Parts: Your Reliable Undercarriage Parts Supplier
DPW Machinery Parts positions itself as a premier global supplier of aftermarket heavy equipment replacement parts, with a strong focus on undercarriage components.
Product Range: They supply a comprehensive range of undercarriage parts for the Daewoo Doosan S400LC/DH400, including this sprocket (P/N 10800021A), track chains, rollers, idlers, and track shoes.
Quality Proposition: DPW parts are manufactured to meet or exceed OEM specifications. They utilize high-grade materials and advanced manufacturing techniques to ensure durability and performance parity with original parts.
Competitive Advantage:
Cost-Effectiveness: Offers a significant price advantage over OEM dealers without compromising on core performance.
Global Logistics: Maintains a robust supply chain and inventory to ensure timely delivery worldwide, minimizing equipment downtime.
Compatibility Guarantee: Parts are rigorously tested for dimensional accuracy and functional compatibility with the specified machine models.
Technical Support: Provides necessary technical data and support to assist with correct part selection and installation.
