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Hyundai R290-3 / R290LC-3 Hydraulic Bucket Cylinder | PN:31E9-65011 | Premium Aftermarket Replacement
1. Basic Product Info
Premium aftermarket bucket hydraulic cylinder PN 31E9-65011, direct OEM replacement for Hyundai R290-3 & R290LC-3 heavy crawler excavator. It controls bucket curl and dump for rock excavation, quarry loading, heavy earthmoving and large infrastructure construction. Produced strictly following original Hyundai OEM drawing, same lug dimension, pin spacing and oil port layout for direct bolt-on installation without field modification.
| Item | Specification |
|---|
| Product Name | Hydraulic Bucket Cylinder |
| Fit Model | Hyundai R290-3, R290LC-3 |
| OEM Part No. | 31E9-65011 |
| Product Grade | Brand New Premium Aftermarket |
| Warranty | 12 months against manufacturing defects |
| MOQ | 1 piece available from stock |
| Certification | ISO9001 full hydraulic inspection |
2. Core Technical Parameters
| Spec Item | Data |
|---|
| Bore Diameter | 145mm |
| Piston Rod Diameter | 95mm |
| Working Stroke | 942mm |
| Rated Working Pressure | 34.3MPa |
| Factory Test Pressure | 51.45MPa (1.5×rated working pressure) |
| Barrel Material | ST52 seamless alloy steel with precision inner honing |
| Piston Rod | 40Cr tempered steel + 28~32μm hard chrome plating, HRC67~70 anti-wear & anti-bending |
| Seal Set | Imported PU+NBR composite high-pressure oil seals |
| Working Temperature | -25℃ ~ +85℃ |
| Design Service Life | ≥8000 working hours under heavy quarry operation |
| Mount Type | Double ear lug with quenched wear-resistant copper bushings |
3. Product Advantages
- 100% OEM Interchangeability: Fully matches original 31E9-65011 dimension, seamlessly connects original bucket linkage and hydraulic pipelines of R290LC-3.
- Quarry-Grade Reinforced Design: Thickened lug base and reinforced cylinder barrel withstand frequent rock collision to avoid lug crack and piston rod deformation.
- Strict Pre-delivery QC Test: Every finished cylinder passes full-pressure tightness test and reciprocating cycle test before warehousing to eliminate inner & outer oil leakage risk.
- Cost-Effective Alternative: Same operating performance as genuine Hyundai parts while saving 40%~50% spare part procurement cost for repair dealers.
- Flexible Logistics Solution: In-stock goods ship within 3 working days; air freight 3~7 working days, sea shipment 32~40 days for bulk orders.
4. Supplier Profile
Our factory specializes in Hyundai -3 series excavator hydraulic cylinders over 12 years, complete boom/arm/bucket cylinder lineup for R210LC-3, R250LC-3, R290LC-3, R305LC-3, products widely exported to Africa, Southeast Asia and Middle East spare parts market.
5. Unique Differentiated FAQ
Q1: Is this cylinder compatible with later updated R290LC-7 model?
A: No, R290LC-7 adopts different OEM part number and mounting spacing, cross installation cannot be realized.
Q2: Can I source matched exclusive repair seal kit along with cylinder order?
A: Supporting matching repair seal kit for separate purchase at bundled preferential price; spare seals are not equipped inside cylinder by default.
Q3: What anti-corrosion packaging do you apply for long-distance ocean shipment?
A: Inner cylinder filled with anti-rust oil, piston rod coated anti-rust grease, wrapped waterproof PE film and packed with thick export plywood case.
Q4: Will I get price benefit when ordering full-set boom+arm+bucket cylinders together?
A: Combined full-set purchase enjoys tiered unit discount and consolidated one-time freight to cut overall logistics expense.
Q5: What procedures should I follow to apply warranty service for unexpected oil leakage?
A: Provide clear leakage site photos plus excavator machine serial number, we offer free replacement seal kit or remote professional installation guidance accordingly.
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