Komatsu 2083000570 PC500LC-10R/PC500LC-10M0 Track Roller Assy/DF–OEM quality Heavy duty excavator undercarriage part source manufacturer&supplier–HELI cqctrack

Technical Specification: Komatsu 2083000570 Track Roller Assembly for PC500LC-10 Series – OEM Quality by HELI (CQC)

Meta Description: Professional source for Komatsu PC500LC-10R/PC500LC-10M0 Track Roller Assy (P/N 2083000570). HELI (CQC) manufactures OEM-quality, heavy-duty excavator undercarriage parts with advanced engineering and rigorous testing.

1. Product Overview & Machine Application

OEM Part Number: 2083000570
Compatible Models: Komatsu PC500LC-10R, PC500LC-10M0, and other variants within the 50-ton-class PC500LC-10 series.
Component Name: Track Roller Assembly (Bottom Roller / Lower Roller)
Supplier/Manufacturer: HELI (CQC) – A professional source for heavy-duty excavator undercarriage components.

The Track Roller Assembly is a fundamental load-bearing component within the crawler undercarriage system. Its primary functions are to:

• Support the Machine’s Weight: It bears a significant portion of the excavator’s operational weight, distributing the load along the bottom run of the track chain.
• Guide the Track Chain: The dual flanges on either side maintain the lateral alignment of the track chain, ensuring smooth travel and preventing derailment.
• Reduce Friction: By providing a smooth, rotating surface for the track chain to travel over, it minimizes rolling resistance and friction-induced power loss.

2. Technical Specifications & Engineering Design

HELI (CQC) manufactures this track roller to meet or exceed the original Komatsu performance specifications through advanced engineering and material science.

• Material Grade:
  • Wheel Core: Forged from high-strength, high-carbon 50Mn or 60Si2Mn steel, providing exceptional impact toughness and fatigue resistance.
  • Shaft: Precision-machined from hardened alloy steel (e.g., 42CrMo) to withstand high torsional and bending stresses.
  • Bushing: Manufactured from wear-resistant sintered bronze or duplex steel, offering an optimal bearing surface with a low coefficient of friction.
• Heat Treatment Process:
  • Core Toughness: The entire roller wheel undergoes quenching and tempering to achieve a uniform, tough core structure (typically 30-40 HRC) capable of absorbing severe shock loads.
  • Surface Hardness: The critical wear surfaces—the rolling contact path and the flange edges—are induction hardened to a high surface hardness of 58-62 HRC. This creates a deep, abrasion-resistant layer that dramatically extends service life in harsh conditions.
• Sealing System (Multi-Stage Labyrinth Design): The integrity of the roller depends on its seals. HELI (CQC) employs a robust, multi-stage sealing system:
  1. Primary Seal: A spring-loaded, nitrile rubber (NBR) radial lip seal that maintains constant contact and pressure.
  2. Labyrinth Seal: A complex, multi-path mechanical seal that effectively traps and expels abrasive contaminants (mud, sand, dust) before they reach the primary seal.
  3. Grease Barrier: The seal cavity is packed with high-temperature, waterproof lithium complex grease, creating a positive pressure barrier against contamination.
• Lubrication: Designed as a sealed-for-life component, the internal cavity is permanently lubricated. A standard grease fitting (zerk) is often provided not for internal lubrication, but for pressure relief and to supplement the barrier grease in the outer seal cavity.

3. HELI (CQC) Manufacturing & Quality Assurance

As a specialized undercarriage parts manufacturer, HELI (CQC) implements a rigorous production and quality control protocol.

• Manufacturing Process Flow: Raw Material (Certified Steel) → Die Forging → Rough Machining → Quenching & Tempering → Induction Hardening → Precision Finish Machining → Seal & Bearing Assembly → Performance Testing → Painting & Packaging.
• Quality Control Checks:
  • Dimensional Verification: 100% inspection of critical dimensions (bore, O.D., flange width) using calibrated instruments and CMM for precision.
  • Hardness Testing: Rockwell and Brinell testing on both the core and wear surfaces of sample rollers from every production batch.
  • Non-Destructive Testing (NDT): Magnetic Particle Inspection (MPI) is used to detect any surface or subsurface flaws in the forged components.
  • Rotational Torque Test: Each assembled roller is tested for smooth rotation and correct rotational torque, ensuring the seals are not over-tightened and the bearings are properly seated.
  • Seal Leakage Test: A pressure decay test or similar method is used to verify the integrity of the sealing system.

4. Common Failure Analysis & Durability Advantages

Using a high-quality replacement like the HELI (CQC) roller prevents common failure modes:

• Premature Flange Wear: Prevented by deep induction hardening.
• Seal Failure & Bearing Contamination: Mitigated by the advanced multi-stage labyrinth seal design.
• Roller Seizure: Avoided through precise internal tolerances, quality lubricant, and effective sealing.
• Core Cracking: Prevented by the forged construction and proper core toughness from Q&T heat treatment.

The HELI (CQC) 2083000570 Track Roller Assembly offers a direct OEM-quality replacement, ensuring compatibility, durability, and optimal performance, thereby protecting your larger investment in the undercarriage system.

5. Why Source from HELI (CQC)?

HELI (CQC) represents the evolution of Chinese heavy equipment manufacturing, offering:

• OEM Equivalency: Parts are reverse-engineered and manufactured to precisely match OEM geometry, material, and performance standards.
• Integrated Manufacturing: Control over the entire production process, from forging to assembly, ensures consistent quality and cost efficiency.
• Proven Durability: Components are tested in real-world conditions comparable to those faced by Komatsu OEM parts.
• Global Supply Chain: Capability to serve international markets with reliable logistics and timely delivery, minimizing equipment downtime for global customers.