起源の場所:
中国
ブランド名:
Belparts
証明:
CE
モデル番号:
315DL
| Hydraulic Parts | Hydraulic Pump | Final Drive | Travel Reduction |
| Swing Motor | Swing Reduction | Control Valve | Gear Parts |
| Slew Bearing | Engine Assembly | Hydraulic Cylinder | ECU |
This heavy-duty dipper arm (stick) hydraulic cylinder is professionally manufactured aftermarket direct replacement exclusively for 315DL medium excavator, correcting the model brand mismatch above—the part number 259-0843 belongs to rather than Komatsu. Serving as the core stretching power component of front digging assembly, it controls arm extension and retraction for foundation trenching, road repairing, pipeline laying, landscaping and small quarry material handling. It is widely stocked by municipal equipment repair shops, mid-sized excavation rental yards and cross-border spare parts traders focusing on DL generation medium diggers.
Production strictly follows original OEM engineering specifi ions. Pin center distances, lug width, bushing inner size and hydraulic port angle fully match dual interchangeable codes 259-0843 and 2590843. No cutting, grinding or welding modifi ion is required during field replacement, effectively lowering labor cost and shortening machine idle time on construction sites.
| Item | Detailed Specifi ion |
|---|---|
| Full Product Name | Dipper Arm / Stick Hydraulic Cylinder Assembly |
| Compatible Equipment | 315DL Medium Excavator |
| Interchangeable OEM Part Numbers | 259-0843, 2590843 |
| Product Grade | Brand-new construction-strength aftermarket hydraulic assembly |
| Quality Warranty | 12-month full coverage against all factory manufacturing defects |
| Minimum Order Quantity | 1 unit, sufficient in-house ready stock for immediate dispatch |
| QC Certifi ion & Testing Standard | ISO9001 whole-process quality traceability; 100% high-pressure airtight leak test & full-stroke recipro ing fatigue testing before packaging |
| # | Part No. | Description | Qty |
|---|---|---|---|
| All | 3420842 | SUPPORT GROUP-HOOD | 1 |
| 1 | 3B8489 | FITTING-GREASE; (FAN AND ALTERNATOR DRIVE) | 1 |
| 2 | 2357679 | SEAL; (LIP TYPE) (69.85mm ID) | 4 |
| 3 | 2590843 | CYLINDER GROUP-STICK | 1 |
| 4 | 8T6763 | PLUG-PIPE; (1/4-18 NPTF THD) | 1 |
| ---- | SEPARATE ILLUSTRATION |
| Technical Index | Standard Value |
|---|---|
| Cylinder Tube Inner Bore | 108 mm |
| Hard Chrome Plated Piston Rod Diameter | 71 mm |
| Effective Working Stroke | 1190 mm |
| Rated System Operating Pressure | 31.4 MPa |
| Factory Hydraulic Proof Test Pressure | 47.1 MPa (1.5 times rated working pressure for all-round leak inspection) |
| Cylinder Barrel Raw Material | High tensile seamless alloy steel with ultra-precision deep inner honing, delivering low-friction, wear-resistant inner wall |
| Piston Rod Surface Craft | 40CrMo quenched & tempered base substrate, 28–32μm compact hard chrome coating, surface hardness HRC68–72, outstanding anti-scratch and anti-bending performance under frequent medium construction loads |
| Matching Dedi ed Seal Kit PN | 259-0843K |
| Safe Operating Temperature Range | -25℃ ~ +85℃ |
| Unique Structural Design | Compact reinforced arm connecting lugs equipped with self-lubri ing copper alloy bushings; built-in single-stage buffer valve to absorb impact and reduce vibration noise during frequent arm stretching & retracting cycles |
Dual Part Number Interchangeable Design Perfectly Matches 315DL
259-0843 and 2590843 are two coding formats for this identical stick cylinder assembly. All connecting dimensions repli e genuine original parts completely, smoothly docking factory arm linkages and matched hydraulic hoses. Assembly dislo ion and subsequent premature seal damage, oil dripping risks caused by forced installation are fully avoided.
Medium Construction Optimized Reinforced Wear-Resistant Frame
Barrel and integrated lug plates adopt targeted thickness reinforcement for daily mixed digging of soil, gravel and soft rock. The upgraded structure withstands long-term medium cyclic loads and minor collisions with concrete edges, tree roots and broken stones, extending overall service life greatly compared with generic thin-wall aftermarket cylinders.
Two Independent Pre-Shipment Screening Eliminates Hidden Failure Risks
Every finished cylinder undergoes dual strict offline testing workflows. Full-stroke recipro ing fatigue test simulates all-day continuous digging work to verify structural rigidity; extended high-pressure soaking airtight inspection detects all internal and external oil leakage flaws. All substandard units are eliminated before warehousing to prevent unexpected construction downtime losses for end users.
Balanced Cost & Durability for Mid-Tier Excavator Fleet Managers
This aftermarket stick cylinder reaches the same structural toughness, operation smoothness and service cycle as authentic OEM spare parts at a far more competitive unit price. It significantly cuts long-term recurring maintenance expenditure for independent repair garages and medium-sized rental companies operating batches of 315DL excavators.
Multi-Mode Global Logistics to Satisfy Varied Client Delivery Needs
All ready-stock items can be shipped out within 3 working days after payment confirmation. Air express channels er to emergency rush orders for sudden on-site breakdown repairs; consolidated bulk sea cargo and full FCL container transport provide budget-friendly wholesale transport solutions for construction machinery distributors covering Africa, Southeast Asia and Middle Eastern municipal engineering markets.
Our production factory possesses more than a decade of specialized R&D and mass manufacturing experience in hydraulic cylinders for DL series medium excavators, including the mainstream 315DL model. We run a complete integrated production line covering heavy precision forging, deep inner honing, integral heat treatment and automatic chrome plating, alongside dedi ed load simulation test benches that repli e real construction working conditions to upgrade product anti-impact durability. Our aftermarket hydraulic cylinder lineup is exported globally all year round, earning consistent positive feedback and stable long-term cooperative relations with worldwide compact machinery spare parts distributors, thanks to precise model matching and steady uniform quality.
A: Cross-model installation is not supported. Different excavator generations and models adopt exclusive OEM part numbers and unique lug mounting geometry without interchangeability. Always double-check your full machine model before submitting orders.
A: Standard packaging only contains the complete dipper arm cylinder assembly. The dedi ed 259-0843K seal kit must be purchased separately, and we offer a discounted bundled quotation for customers ordering cylinder and seal kit together.
A: Anti-rust hydraulic fluid is fully injected into both front and rear cylinder chambers to block internal corrosion; thick anti-rust grease is evenly coated across the entire exposed piston rod surface. The whole cylinder unit is wrapped in multi-layer heavy-duty waterproof PE film and secured inside reinforced thick plywood export crates to prevent scratches, impact deformation and moisture erosion during lengthy cross-ocean transit.
A: Yes. Orders for complete front working device cylinder sets qualify for progressive bulk preferential pricing. Consolidated full-container sea shipping service is also available to minimize overall international logistics expenses for large batch purchases.
A: Kindly supply clear photos showing the exact leakage position plus your excavator serial number for verifi ion. We will deliver free replacement seal components and detailed step-by-step remote maintenance guidance in a timely manner to resolve leakage faults efficiently without delaying construction progress.
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