XCMG 800379139 D170/D170LGP Bulldozer Forging Track Idler Wheel Assembly Heavy duty tractor and dozer forged Idler manufacturer / HAN GONG / DPW PARTS
| ||||||||||||||||||||||||||
Product Specifications
Introduction: The Critical Role of the Track Idler in Dozer Undercarriage Systems
The undercarriage of a bulldozer is a permanently engaged work system, subject to extreme static and dynamic loads, abrasion, and impact. Within this system, the Track Idler Wheel Assembly serves a fundamental dual function: it guides the track chain in a precise path while simultaneously absorbing and distributing the immense weight and shock loads of the machine and its workload. For high-production models like the XCMG D170 and D170LGP (Low Ground Pressure) bulldozers, the idler's integrity is non-negotiable for maintaining track tension, alignment, and overall undercarriage health. The Forged Idler Wheel Assembly (Part No. 800379139) represents the pinnacle of durability and reliability for these demanding applications.
Technical Analysis: XCMG D170/D170LGP Forged Track Idler Wheel Assembly (800379139)
This assembly is a precision-engineered pivot point designed for the specific load ratings and operational stresses of the XCMG D170 series bulldozers.
Primary Functions & Operational Demands:
Guidance & Alignment: The idler's precisely machined tread profile guides the track chain, preventing lateral slippage and ensuring smooth engagement with the sprocket and rollers.
Load Bearing & Impact Absorption: Positioned at the front of the track frame, it supports a significant portion of the machine's weight and is the first point of contact with obstacles, absorbing vertical shock loads.
Track Tension Regulation: It acts as the forward pivot point for the track tensioning system (via the recoil spring assembly), maintaining optimal track shoe ground contact and sag.
Engineering & Material Superiority of Forged Construction:
Forging vs. Casting: HAN GONG/DPW PARTS specializes in forged idler wheels. The forging process involves shaping heated, high-strength alloy steel under immense pressure. This aligns the metal's grain flow to the contour of the part, resulting in superior tensile strength, impact toughness, and fatigue resistance compared to cast alternatives, which can harbor internal imperfections.
Core Component Breakdown:
Forged Idler Wheel Body: Manufactured from premium 42CrMo or similar alloy steel, offering an exceptional strength-to-weight ratio. The forged blank is machined to exact tolerances to create the dual-flange tread that securely contains the track chain link.
Integral Forged Hub & Shaft: The forging often incorporates the hub, providing a monolithic connection to the shaft or spindle, eliminating weak points found in welded assemblies.
Bearing & Sealing System: The assembly houses a robust tapered roller bearing or slewing bearing capable of handling high radial and axial loads. It is protected by a multi-labyrinth seal system or high-performance grease seals to retain lubrication and exclude abrasive contaminants like dust, mud, and water—the primary enemy of undercarriage components.
Hardfacing & Wear Protection: The critical wear surfaces, particularly the flange edges and tread, are often reinforced with automatic submerged arc hardfacing using high-chromium alloy wires. This deposits a layer significantly harder than the base material, dramatically extending service life against metal-to-metal wear with the track chain.
HAN GONG / DPW PARTS: A Manufacturer Specialized in Forged Undercarriage Solutions
HAN GONG (trading under DPW PARTS) is a dedicated manufacturer focused on the production of heavy-duty forged undercarriage components for crawler tractors, dozers, and excavators. Their expertise lies in providing direct, high-quality replacements for OEM parts from manufacturers like XCMG, Caterpillar, Komatsu, and others.
Manufacturing Philosophy and Quality Assurance:
Vertical Forging Expertise: Their core competency is in closed-die forging. They utilize high-tonnage forging presses to ensure optimal metal density and structural integrity for every idler wheel blank.
Precision Machining: Post-forging, components undergo meticulous CNC machining. This ensures perfect concentricity, precise flange dimensions, and exact mounting interface specifications for the XCMG D170 frame, guaranteeing a perfect fit.
Controlled Heat Treatment: A critical differentiator. Parts undergo quenching and tempering processes to achieve a uniform, deep hardness profile that balances surface wear resistance with a tough, shock-absorbing core.
Rigorous Testing Protocol: Quality control is embedded throughout the process, including:
Ultrasonic testing of forged blanks to detect any internal flaws.
Spectrographic analysis to verify steel alloy composition.
Dimensional verification with CMM (Coordinate Measuring Machines).
Bearing fit and seal runout testing to ensure smooth rotation and sealing integrity.
Value Proposition and Application Guidance
The XCMG 800379139 Forged Idler Wheel Assembly by HAN GONG/DPW PARTS is engineered for performance-driven replacement. Its value lies in:
Enhanced Durability: The forged construction and professional-grade hardfacing offer a potential service life extension, reducing downtime frequency.
Reliability Under Load: Specifically engineered to handle the increased ground contact and load distribution of the D170LGP variant, as well as the standard D170 model.
System Compatibility: Designed as a direct, bolt-for-bolt replacement, ensuring proper interaction with the existing track chain, rollers, and tensioning system.
Maintenance Insight: Idler failure often manifests as excessive lateral wobble, visible flange wear, seal leakage, or bearing seizure. Regular inspection for these signs and prompt replacement in matched sets (where applicable) is crucial to protect the entire track chain and adjacent components from accelerated wear.
Conclusion
The track idler wheel is far more than a simple guide wheel; it is a fundamental load-bearing pivot essential for dozer stability and efficiency. The XCMG D170/D170LGP Forged Track Idler Wheel Assembly (800379139) from HAN GONG / DPW PARTS exemplifies how specialized manufacturing—centered on forging technology, precision engineering, and rigorous quality control—delivers components that meet the severe demands of modern heavy earthmoving. For equipment managers seeking to optimize undercarriage life and performance, partnering with a focused manufacturer like HAN GONG provides a reliable, technologically sound alternative for critical undercarriage maintenance and repair.
