LIEBHERR-R974 Track Roller Assembly for EC620/ATLAS-2502/DEMAG-H55/65-Crawler undercarriage parts.
Product Specifications
Liebherr R974 Track Roller Assembly -DPW Machinery PARTS supply high quality undercarriage parts.
1. Track Roller Assembly Overview
Function: Supports the machine’s weight, guides the track chain, and reduces friction during movement.
Applications: Heavy-duty mining/shovel excavators like:
Liebherr R974 (mining shovel)
Atlas 2502 (large hydraulic excavator)
Demag H55/65 (older mining shovel models).
2. Key Specifications
Materials & Construction
Forged Steel or Ductile Iron: High-grade alloy (e.g., 42CrMo) for extreme load-bearing capacity.
Sealed Bearings: Lubricated, multi-sealed designs to prevent dust/contaminant ingress.
Hardness: Surface-hardened to HRC 50-55 for abrasion resistance.
Dimensions & Compatibility
Bore Size: Typically 80–120mm (varies by model).
Flange Design: Double-flanged for track chain guidance.
Load Rating: 15–30+ metric tons per roller (mining-grade).
OEM Part Numbers (Examples)
| Model | Possible OEM Part Number | Notes |
|---|---|---|
| Liebherr R974 | 5209249 | Confirm with Liebherr docs |
| Atlas 2502 | 2105021 | Atlas Copco legacy parts |
| DEMAG H55/H65 | LH1953 | Older Demag shovels |
Always verify with your machine’s manual or OEM dealer.
3. Common Issues & Maintenance
Premature Wear: Caused by misalignment, over-tensioning, or abrasive environments.
Solution: Regularly check track tension and clean undercarriage.Bearing Failure: Due to seal damage or lack of lubrication.
Solution: Use high-temperature grease and inspect seals.
4. Replacement Options
OEM Sources
Liebherr: Direct dealers for genuine parts (high cost but exact fit).
Atlas Copco/Demag: Legacy parts may require specialized suppliers (e.g., TK Mining Services).
Aftermarket Suppliers
Berco / ITR Group: Reliable for mining-grade rollers.
Hensley Parts (U.S.) / BTP Group (Europe): Custom assemblies.
Alibaba/China Suppliers: Look for ISO 9001-certified manufacturers (e.g., Shandong Lite Engineering).
Price Range
Aftermarket: $500–$1,500 per roller (bulk discounts possible).
OEM: $2,000–$4,000+ per unit.
5. Installation Tips
Clean Track Frame: Remove debris before installation.
Align Rollers: Ensure parallelism to sprockets/idlers.
Torque Bolts: Use OEM-specified torque values to avoid loosening.
6. Cross-Brand Compatibility
Some Demag H55/65 rollers may interchange with older O&K/Bucyrus shovels due to shared designs.
Atlas 2502 parts are often unique; consult technical drawings.
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