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Original Drive Shaft 3085780 for ZX135US-7 Excavator

Place of Origin China/Japan
Brand Name LIRACE/Hitachi
Model Number ZX240-3
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 hydraulic Engine to Pump Drive Shaft features the genuine Hitachi part number 3085780. As the absolute core torque bridge between the engine and the main hydraulic pump, this high-end power transmission unit is deeply engineered for the Hitachi new-generation ZAXIS-7 series ultra-short rear swing hydraulic excavators, accurately restoring the core powertrain chain of the Hitachi ZX135US-7 and its co-platform 13-ton class flagship models. Based on first principles, it is precision forged from high-grade premium alloy structural steel (42CrMo) with high-frequency induction hardening on the splines. It delivers extreme torsional stiffness and resistance to alternating shear stresses, seamlessly countering peak impulse loads delivered by the engine. The product packaging physical dimensions are approximately 320mm × 115mm × 115mm, with a net weight of around 4.85kg.
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Maintenance Tips
"Daily Inspection (Every 10 Hours / Shift): Before each shift, with the engine off, conduct a mandatory visual check of the pump bay connection area. Inspect for any blind spots of hard dust shedding or physical loosening, and monitor for any black-box high-frequency physical vibration or abnormal metallic knocking upon startup.

Lubrication & Fastening Torque Check (Every 250 Hours): Every 250 working hours, execute a rigid torque check on the connecting flange bolts and inject brand-new genuine extreme-pressure heavy-duty lithium grease into the spline interface and universal joints (if applicable) to thoroughly clear out residual oxides.

Wear Quantification & Lifetime Overhaul (Every 2000 Hours): At a maximum of 2000 hours (or during deep main hydraulic pump overhauls), the drive shaft must be removed. Use precise calipers and micrometers to quantify spline backlash. If wear or radial runout exceeds the OEM physical limit thresholds, the unit must be rigidly replaced forward."
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Installation Tips
"Absolute Concentricity Verification & Surface Cleaning (Core Pitfall Avoidance): Before assembly, completely wipe down the internal splines of the flywheel coupling and the main pump input shaft, ensuring zero micrometer-level hard debris remains. During mounting, you must use a dial indicator to rigidly verify the physical coaxial alignment between the engine flywheel center and the main pump input shaft (axial angular deviation must be strictly controlled within micrometer-level OEM limits). Any misalignment out of spec will trigger devastating alternating eccentric stress, leading to lightning-fast snapping of the drive shaft upon engine ignition.

Spline Greasing & Stress-Free Sliding: Uniformly apply a layer of genuine anti-seize molybdenum disulfide grease onto the internal and external spline surfaces. Align the spline axes properly and slide the shaft smoothly and stably into its designated physical position. Never use a heavy sledgehammer to blindly smash the shaft end, preventing micro-stress concentration and latent lattice damage."
Brand China/Japan Brand Name LIRACE/Hitachi
Model ZX240-3 Product Name Drive Shaft
Part Number 3085780 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.
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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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