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Original Excavator Bearing YA00047226 for Hitachi EX1900E-6LD

Place of Origin China/Japan
Brand Name LIRACE/Hitachi
Model Number ZX300LC-5A
Minimum Order Quantity 1 PCS
Price Negotiable price
Packaging Details Wooden case or as required
Delivery Time 5-8 Weekdays
Payment Terms Western Union,T/T
Supply Ability 300pcs /Month
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Basic Parameters & Introduction
This premium heavy-duty mining-grade High-Precision Excavator Bearing Assembly features the genuine Hitachi part number YA00047226. As an absolute core load-bearing skeleton within the main pump drivetrain or working equipment slewing support mechanisms, this high-end physical load unit is deeply engineered for Hitachi ultra-heavy giant mining hydraulic excavators, accurately restoring the powertrain and mechanical drive transmission of the Hitachi EX1900-6 and EX1900E-6LD 190-ton class behemoth flagship models. Based on first principles, it is precision forged from high-purity vacuum-degassed bearing steel, treated with fully automated deep induction hardening and micrometer-level super-finished raceways. It delivers extreme surface hardness and a high-fatigue physical matrix, seamlessly countering peak alternating shear stresses and large-inertia impacts under severe mining conditions. The product packaging physical dimensions are approximately 310mm × 310mm × 95mm, with a net weight of around 24.8kg.
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Maintenance Tips
"Daily Inspection for Noise (Every 10 Hours / Shift): Before and during each shift, a mandatory check via acoustic sticks or sensors must be conducted around the bearing housing to detect any blind spots of black-box high-frequency physical vibration, metallic knocking, or sudden localized overheating.

Quantitative Oil/Grease Monitoring (Every 250 Hours): Every 250 working hours, rigidly check the state of the bearing grease or gear oil. Sample and inspect the lubrication medium for any metallic flakes, hard mine dust shedding, or rubber micro-particles to proactively diagnose microscopic raceway wear.

Rigid Complete Replacement (Every 4000 Hours / 2 Years): At a maximum of 4000 hours (or 2 years), it is highly recommended to perform a preventive, forced rigid replacement of this core critical bearing during major pump or attachment overhauls, completely cutting off the chain risk of catastrophic cage failure or spalling caused by micro-material thermodynamic fatigue."
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Installation Tips
"Extreme Cleanliness & Housing Bore Verification (Core Pitfall Avoidance): The overhaul assembly environment must meet absolute dust-free purification standards. Before assembly, completely clean the housing bore and shaft journal. Use micrometers to rigidly verify dimensional tolerances and roundness, ensuring zero micrometer-level scratches, burrs, or foreign matter remain on the surfaces. Any minor obstruction will trigger local stress concentration, causing a lightning-fast bearing burnout upon startup.

Thermodynamic Assisted Interference Fit: Never use a heavy sledgehammer or brass bar to blindly smash the inner or outer rings of the bearing. It is mandatory to use a micro-induction heater to evenly heat-expand the bearing (keep heating temperature strictly between 80°C and 120°C), or apply physical freezing to cold-shrink the shaft, allowing it to slide smoothly and stress-free into its designated physical position."
Brand China/Japan Brand Name LIRACE/Hitachi
Model ZX300LC-5A Product Name Bearing
Part Number YA00047226 ApplicableBrand Hitachi
Warranty Period 6-12 months Condition NEW
Standard or Non-standard Standard Type Guarantee We will inspect the products and send detailed pictures to the buyer for confirmation.
Applicable Industries Mechanical Repair Shops, Retail, Construction, Energy, Mining Shipping Method Sea freight, Air freight, DHL/FEDEX/TNT/EMS

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What We Do

Services we Offer

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What if there are quality problems with the purchased products?

Please rest assured completely. We implement strict quality control throughout the whole production process. From raw material incoming inspection to finished product delivery, all items undergo multiple rounds of rigorous technical inspection and performance testing, to fully ensure every delivered product meets 100% qualified standards. All unqualified products detected during inspection will be disposed of by centralized destruction, to firmly prevent defective goods from entering the market. Meanwhile, we provide an extended warranty period of 6 to 12 months for all products. Within the warranty period, if any non-artificial quality failure occurs, please contact us promptly. Our professional technical team will respond at the earliest time and offer targeted solutions based on actual conditions. In addition, we deliver all-round technical support to safeguard your after-sales operation. Always taking customer satisfaction as the core principle, we are committed to establishing long-term and stable cooperative partnerships with global clients.
service2

What happens if the delivered item is unsuitable for my needs?

Please rest assured. To ensure that the products you receive fully meet your needs, we will conduct multiple rounds of demand confirmation with you before shipment, fundamentally avoiding the problem of wrong or missing delivery. To further ensure accuracy, we will first conduct precise query and verification through the product part number you provide to ensure that the product model and specifications are completely matched. If you do not have an accurate part number temporarily, we will arrange professional technicians to check and confirm one by one according to the clear product pictures and corresponding construction machinery models you provide, and communicate and synchronize with you throughout the process until confirmed correct before arranging shipment, to fully ensure that you receive the products you need and avoid unnecessary troubles.
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What professional shipping and delivery standards can we provide you?

Within our international trade operations, we prioritize a high-efficiency supply chain and a transparent logistics framework. To ensure the accuracy of every shipment, a standardized PDI (Pre-Delivery Inspection) system is strictly enforced. Before the final sealing of containers, our QC specialists conduct a thorough re-examination. We provide clients with high-resolution photos of the actual items, packaging details, and the Packing List for Visual Confirmation, ensuring 100% compliance with order specifications and delivery transparency. We support versatile Incoterms, including EXW and FOB. To meet diverse delivery timelines and cost constraints, we offer a multi-modal logistics matrix ranging from Ocean Freight and Air Freight to global couriers (DHL/FEDEX/TNT/EMS). We guarantee full professional documentation support for every shipment to ensure a safe, timely, and compliant arrival at the port of destination.
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We are a global one-stop supplier of excavator spare parts. We maintain full control over the entire process from R&D and manufacturing to sales, delivering top-quality excavator components to you.

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