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4438245 Hitachi EX1200 Backhoe Bucket Cylinder Aftermarket
4438245 Hitachi EX1200 Backhoe Bucket Cylinder Aftermarket
Precision and Reliability: Backhoe Bucket Cylinder
The EX1200 Backhoe Bucket Cylinder is a heavy-duty hydraulic actuator manufactured by SEIGO Machinery for the Hitachi EX1200 Mining Excavator series (EX1200-5, EX1200-6). Designed as a precise aftermarket replacement for OEM Part Number 4438245, this cylinder provides the essential digging power required for mass excavation and truck loading.
Built to withstand the high-cycle demands of backhoe operations, our cylinder features an induction-hardened rod to resist impact damage from rock faces and advanced sealing systems to prevent internal leakage under load.
Technical Specifications
| Feature | Specification |
| Part Number | 4438245 |
| Machine Compatibility | Hitachi EX1200-5 / EX1200-6 |
| Configuration | Backhoe Spec (Standard Boom & Arm) |
| Position | Bucket Cylinder (Digging) |
| Rod Material | 42CrMo4 Induction Hardened & Chrome Plated |
| Sealing System | NOK / Parker (Shock-Load Resistant) |
| Tube Material | ST52 / E355 High-Tensile Honed Tube |
| Warranty | 12 Months / 2000 Hours |
| Condition | 100% New Manufacturing |
Key Features & Performance
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Hitachi Backhoe Geometry: Engineered strictly to the dimensions of part number 4438245, ensuring the correct bucket curling angle and breakout force for EX1200 backhoe attachments.
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Maximum Digging Power: The cylinder barrel is constructed from high-tensile steel to handle the maximum hydraulic system pressure (350 Bar+) without expansion, delivering consistent penetration power in hard ground.
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Debris Protection: The piston rod is surface-hardened to HRC 55-60 to resist scratches from falling debris, while the wiper seals are upgraded to prevent coal dust and grit from entering the system.
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Long-Life Durability: Equipped with premium NOK seals capable of withstanding the heat generated during continuous loading cycles in mining environments.
Applications
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Mass excavation (Coal, Overburden)
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Quarry truck loading
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General heavy construction
FAQ
Q1: Why does my OEM bucket cylinder fail so fast in hard rock?
A: Hard-rock bucket operation generates transient pressure spikes during tooth-to-rock contact that can exceed 50 MPa for milliseconds. Standard seals are rated for steady-state pressure, not transient spikes. Our buffer-seal design absorbs these spikes before they reach the primary seal, typically doubling seal life.
Q2: What’s the cost difference vs Hitachi OEM 4438245?
A: SEIGO 4438245 is typically 40-50% less than Hitachi OEM dealer pricing, with a longer warranty (12 months vs 6 months typical OEM). Contact us for current pricing quote.
