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Komatsu 707-E1-00620 Boom Cylinder Assembly

Place of Origin China/Japan
Brand Name LIRACE/Komatsu
Model Number PC2000-8
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
The 707-E1-00620 is a high-performance boom hydraulic cylinder assembly engineered for the Komatsu PC2000-8 backhoe excavator. As a direct OEM replacement (Part No. 707E100620), this cylinder is the critical actuator for boom lifting and lowering operations in heavy mining applications. Key Specifications: Cylinder quantity — 2 per machine; Bore diameter — Ø280 mm; Stroke length — 1,930 mm; Assembly weight — 2,209 kg. The cylinder features an induction-hardened, low-temperature impact-resistant alloy steel rod and heavy-duty wear bands, ensuring reliable performance under extreme loads and challenging mining conditions
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Maintenance Tips
Proper maintenance is essential to maximize service life and ensure operational reliability. Daily (Every 10 hrs): Visually inspect the boom cylinder for external oil leaks at rod seals, tube welds, and hose fittings; check all mounting bolts for tightness. Every 1,000 hrs: Perform detailed inspection of the piston rod surface (Ø280 mm bore cylinder) for scoring, pitting, or chrome flaking; retighten all high-pressure flange bolts and pipe clamps to Komatsu-specified torque values. Major Overhaul (Every 4,000–8,000 hrs): Replace all internal seals, O-rings, and wear rings using OEM-grade seal kits (e.g., 707-99-96140). Seal material specification: PU + NBR + PTFE compound for optimal high-pressure performance. Always refer to the PC2000-8 Operation & Maintenance Manual for serial-number-specific intervals.
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Installation Tips
Strict adherence to installation protocols is mandatory for safety and reliability. Mandatory Replacements: All gaskets, O-rings, backup rings, and cotter pins must be replaced with new components—never reuse old sealing elements. Surface Preparation: Thoroughly degrease and clean all mating flange surfaces and pin bore interfaces to eliminate contaminants before fitting. Torque Application: Tighten all mounting bolts and split flange clamps in a cross-pattern sequence in 3 incremental stages to Komatsu Engineering Standard (KES) torque specifications. Uneven torque distribution will cause flange distortion and premature seal failure. System Bleeding: After installation, start the engine at low idle; stroke the cylinder to approximately 100 mm before full extension for 4–5 cycles, then perform 3–4 full-stroke cycles (1,930 mm) to purge trapped air from the hydraulic circuit. Ensure all hydraulic hoses are routed without kinking and securely fastened with OEM-spec clamps.
Brand China/Japan Brand Name LIRACE/Komatsu
Model PC2000-8 Product Name Hydraulic Boom Cylinder
Part Number 707-E1-00620 ApplicableBrand Komatsu
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

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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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