GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED
| Model | EX450LC-5 EX450-5 |
| Packaging Details | Wooden Case Packing |
| Shipment | DHL FEDEX TNT EMS UPS / Ses / Air |
| Product name | 4340511 |
| Emission standards | Stage V |
| Part name | Hydraulic Boom Cylinder |
| Delivery Time | 3-7 Day |
| Quality | Aftermarket High Quality |
| Payment Terms | L/C,D/A,D/P,T/T,TRADE ASSURANCE,WEST UNION,PAYPAL |
| Condition | New |
| Application | Excavator |
| Warranty | 1 Year |
| Supply Ability | 100 PCS / Months |
| Place of Origin | China |
| Model Number | EX450LC-5 EX450-5 |
| Brand Name | Belparts |
| Certification | CE |
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Product Specification
| Model | EX450LC-5 EX450-5 | Packaging Details | Wooden Case Packing |
| Shipment | DHL FEDEX TNT EMS UPS / Ses / Air | Product name | 4340511 |
| Emission standards | Stage V | Part name | Hydraulic Boom Cylinder |
| Delivery Time | 3-7 Day | Quality | Aftermarket High Quality |
| Payment Terms | L/C,D/A,D/P,T/T,TRADE ASSURANCE,WEST UNION,PAYPAL | Condition | New |
| Application | Excavator | Warranty | 1 Year |
| Supply Ability | 100 PCS / Months | Place of Origin | China |
| Model Number | EX450LC-5 EX450-5 | Brand Name | Belparts |
| Certification | CE |
More Branded Accessories are Available
| Hydraulic Parts | Hydraulic Pump | Final Drive | Travel Reduction |
| Swing Motor | Swing Reduction | Control Valve | Gear Parts |
| Slew Bearing | Engine Assembly | Hydraulic Cylinder | ECU |
EX450LC-5 / EX450-5 Hydraulic Boom Cylinder for Hitachi Excavator | PN:4340511 | Premium Aftermarket Replacement
1. Basic Product Info
This top-grade aftermarket hydraulic boom cylinder is professionally manufactured to serve as a direct replacement for Hitachi EX450LC-5 and EX450-5 large excavators. As an essential power unit of the front working assembly, it precisely controls the lifting and lowering of the boom to deliver robust performance for heavy excavation, bulk material hoisting and land leveling work. It is widely put into use in open-pit mining, highway engineering, large-scale earthmoving and industrial site reconstruction projects. All products are fabricated in strict accordance with Hitachi original OEM specifications, with identical installation dimensions, pin hole gaps and hydraulic port positions. Field staff can complete direct bolt-on installation without cutting, welding or any extra on-site modifications.
| Item | Specification |
|---|---|
| Product Name | Hydraulic Boom Cylinder |
| Applicable Model | Hitachi EX450LC-5, EX450-5 Excavator |
| OEM Part Number | 4340511 |
| 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
| # | Part No. | Description | Qty |
|---|---|---|---|
| 4310241 | CYL.; BOOM (R) | 1 | |
| 144 | 4340511 | . CYL. (PIPELESS) | 1 |
| 1 | 0420101 | .. TUBE; CYL. ASS'Y | 1 |
| 1A | ---- | ... TUBE; CYL. | 1 |
| 1B | 0420112 | ... BUSHING; PIN | 1 |
| 2 | 0420103 | .. ROD; PISTON ASS'Y | 1 |
| 2A | ---- | ... ROD; PISTON | 1 |
| 2B | 0420104 | ... BUSHING; PIN | 1 |
| 3 | 0420105 | .. HEAD; CYL. | 1 |
| 4 | 0352704 | .. BUSHING | 1 |
| 5 | 0133103 | .. RING; RETAINING | 1 |
| 6 | 0352705 | .. RING; SEAL | 1 |
| 7 | 0352706 | .. PACKING; U-RING | 1 |
| 8 | 0352707 | .. RING; BACK-UP | 1 |
| 9 | 0460004 | .. RING; SLIDE | 1 |
| 10 | 4438200 | .. RING; WIPER | 1 |
| 11 | A811160 | .. O-RING | 1 |
| 12 | 4170546 | .. RING; BACK-UP | 1 |
| 13 | 0352716 | .. BOLT; SOCKET | 8 |
| 14 | 0420106 | .. BRG.; CUSHION | 1 |
| 15 | 0420113 | .. SEAL | 1 |
| 16 | 0420108 | .. PISTON | 1 |
| 17 | 4170547 | .. RING; SEAL ASS'Y | 1 |
| 18 | 0420109 | .. RING; SLIDE | 2 |
| 19 | 0259307 | .. RING; SLIDE | 2 |
| 20 | 0352713 | .. NUT | 1 |
| 21 | 0352714 | .. SHIM | 1 |
| 22 | 0104404 | .. BALL | 1 |
| 23 | 0352715 | .. SCREW; SET | 1 |
| 25 | 0420110 | .. RING; WIPER | 2 |
| 27 | 0420111 | .. RING; WIPER | 2 |
| 44 | J75481 | .. FITTING; GREASE | 1 |
| 58 | 0352717 | . PIPE | 1 |
| 59 | 0352718 | . PIPE | 1 |
| 60 | 0309020 | . BOLT; SOCKET | 8 |
| 61 | 984614 | . O-RING | 2 |
| 63 | 0309219 | . CLAMP; PIPE | 1 |
| 64 | 0237417 | . BOLT | 1 |
| 65 | 0208516 | . WASHER; SPRING | 1 |
| 66 | 0352719 | . BAND | 1 |
| 67 | 0352720 | . BAND | 1 |
| 68 | 0352721 | . BAND | 2 |
| 69 | 0236915 | . HOLDER | 2 |
| 70 | 0236916 | . BOLT | 1 |
| 71 | A590914 | . WASHER; SPRING | 1 |
| 72 | 0408815 | . BOLT | 4 |
| 73 | 0325913 | . WASHER | 4 |
| 100 | 4340620 | KIT; SEAL | 1 |
| 101 | 4438672 | KIT; SEAL | 1 |
| Spec Item | Data |
|---|---|
| Bore Diameter | 150mm |
| Piston Rod Diameter | 99mm |
| Working Stroke | 1570mm |
| Rated Working Pressure | 31.4MPa |
| Factory Test Pressure | 47.1MPa (1.5 times the rated working pressure) |
| Barrel Material | High-tensile seamless alloy steel with precision inner honing |
| 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 | 4340511K |
| Working Temperature | -25℃ ~ +85℃ |
| Structure | Double ear lugs with quenched copper wear bushings, built-in buffer device to reduce impact during operation |
3. Product Advantages
4. Supplier Brief
Our production base has focused on the development and manufacturing of hydraulic cylinders for Hitachi classic EX series excavators for more than ten years. We provide a full lineup of boom, arm and bucket cylinders covering EX450-5 and other mainstream Hitachi models. With sophisticated production craftsmanship and rigorous quality management rules, our products are continuously exported to aftermarket markets across Africa, Southeast Asia and the Middle East, winning consistent trust and favorable feedback from overseas clients.
5. FAQ
Q1: Can this boom cylinder be used on EX400-5 or EX480-5 excavator models?
A: No. Different Hitachi excavator models adopt exclusive part numbers and structural dimensions, so they are not interchangeable. Please double-check your equipment model before placing orders.
Q2: Does the standard delivery 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, and we will offer a competitive 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 coated on the piston rod surface. The whole product is wrapped with waterproof PE film and packed in durable export plywood cases.
Q4: Can we get preferential rates when purchasing a full set of working device cylinders?
A: Yes. Orders for complete cylinder sets are eligible for tiered discounts. We also provide consolidated shipment service to help customers reduce overall logistics costs.
Q5: What technical assistance can be offered if oil leakage occurs during the warranty period?
A: Please take clear photos of the leaking area and provide the excavator serial number. We will arrange free seal replacement and professional remote troubleshooting guidance in a timely manner.
Company Details
Business Type:
Manufacturer,Exporter,Trading Company
Year Established:
2013
Total Annual:
900000-3000000
Employee Number:
50~93
Ecer Certification：
Verified Supplier
GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service.... GUANGZHOU BELPARTS ENGINEERING MACHINERY LIMITED founded in September 2013, loed in the engineering machinery market in Guangzhou, China. At present , we have one shop, one warehouse and one office as well as a professional team for purchasing, selling, packing, shipping and after-sale service....
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