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John Deere 790E LC / 790E Hydraulic Arm Cylinder for Excavator | PN:4322741 | Premium Aftermarket Replacement
1. Basic Product Info
This high-performance aftermarket hydraulic arm cylinder is precisely engineered as a direct replacement for John Deere 790E LC and 790E heavy-duty excavators. As a critical hydraulic actuator of the front working group, it controls the smooth extension and retraction of the arm to deliver exceptional power for heavy digging, bulk material lifting, and large-scale earthmoving operations. It is extensively utilized in open-pit mining, quarry operations, major infrastructure construction, and large land development projects. All products are manufactured in strict compliance with John Deere original OEM technical standards, featuring identical mounting dimensions, pin pitch, and hydraulic port layout. Field operators can complete straightforward bolt-on installation on site without cutting, welding, or any secondary modification work.
| Item |
Specification |
| Product Name |
Hydraulic Arm Cylinder (Stick Cylinder) |
| Applicable Model |
John Deere 790E LC, 790E Excavator |
| OEM Part Number |
4322741 |
| Product Grade |
Brand New High-Quality Aftermarket |
| Warranty |
12 months against manufacturing defects |
| MOQ |
1 unit, ample stock for immediate delivery |
| QC Standard |
ISO9001 certified, full hydraulic pressure and cyclic tests before shipment |
2. Core Technical Parameters
| Spec Item |
Data |
| Bore Diameter |
150mm |
| Piston Rod Diameter |
100mm |
| Working Stroke |
1600mm |
| Rated Working Pressure |
31.4MPa (4550 psi) |
| Factory Test Pressure |
47.1MPa (6830 psi) - 1.5 times the rated working pressure |
| Barrel Material |
High-tensile seamless alloy steel with precision inner honing (Ra ≤ 0.4μm) |
| Piston Rod |
40CrMo heat-treated steel, 28~32μm hard chrome plating, HRC68~72 for superior wear resistance and anti-deformation performance |
| Matching Seal Kit PN |
4322741K |
| Working Temperature |
-25℃ ~ +85℃ |
| Hydraulic Fluid Compatibility |
John Deere Hy-Gard™ and other standard hydraulic fluids |
| Structure |
Double ear lugs with quenched copper wear bushings, built-in buffer device to reduce impact during operation |
| Net Weight |
285 kg (628 lbs) |
3. Product Advantages
- 100% OEM Fitment Accuracy: Every dimension and structural design strictly follows John Deere factory specifications, ensuring perfect connection with arm linkages and hydraulic pipelines for stable operation under long-hour continuous heavy loads.
- Heavy-Duty Reinforced Construction: The cylinder body and joint lugs adopt optimized thickened design to withstand persistent heavy pressure and frequent impacts in harsh mining and construction environments, effectively extending overall service life.
- Comprehensive Pre-Shipment Quality Assurance: Each finished unit undergoes multiple rounds of full-stroke cycle operation and high-pressure tightness inspection, thoroughly eliminating hidden risks of internal and external oil leakage.
- Superior Cost Performance: It matches the durability and working efficiency of genuine John Deere parts, helping equipment maintenance teams and spare parts merchants effectively lower long-term procurement costs by 30-50% compared to OEM alternatives.
- Flexible Global Delivery Solutions: In-stock goods can be dispatched within 3 working days. Air freight caters to time-critical orders, while sea freight is the most economical option for large batch wholesale.
4. Supplier Brief
Our factory has focused on the research, development, and production of hydraulic cylinders for John Deere E series large excavators for more than ten years. We supply a complete range of boom, arm, and bucket cylinders covering 790E series and other mainstream John Deere equipment models. With sophisticated production techniques and strict quality management systems, our products are exported to aftermarket markets across Africa, Southeast Asia, and the Middle East all year round, gaining reliable credibility among global buyers. We specialize in producing high-quality aftermarket replacements that meet or exceed OEM specifications at competitive prices.
5. FAQ
Q1: Can this arm cylinder fit John Deere 790D or 892E LC excavator models?
A: No. Different John Deere excavator models are equipped with exclusive part numbers and structural sizes, which are not interchangeable. Please confirm your equipment model and serial number before placing orders.
Q2: Does the standard package include the dedicated seal repair kit?
A: The seal repair kit is not included in standard products. You can purchase the matching repair kit separately (PN: 4322741K), and we will offer a favorable price for combined orders.
Q3: What packaging is used for long-distance overseas sea transportation?
A: Anti-rust oil is injected into the cylinder interior, and anti-rust grease is applied on the piston rod surface. The whole product is wrapped with waterproof PE film and packed in solid export plywood cases with reinforced corners to ensure safe delivery.
Q4: Are there preferential policies for purchasing a full set of working device cylinders?
A: Yes. Orders for complete cylinder sets (boom + arm + bucket) enjoy tiered discounts (10-15% off). We also provide consolidated shipment service to help customers cut down logistics expenses by combining multiple items into a single container.
Q5: What after-sales support will be provided if oil leakage occurs within the warranty period?
A: Please take clear photos of the leakage position and provide the excavator serial number and purchase date. We will arrange free seal replacement and professional remote troubleshooting guidance within 48 hours. If necessary, we can also dispatch a technical engineer to your site (additional charges may apply for on-site service).
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