Description
1. Key Features & Benefits
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Genuine OEM Specification – Part number 4179833. Manufactured to Hitachi‘s original equipment standards for the transfer case / pump drive gearbox of ZX330, ZX330-3, ZX330-5G, ZX330-5A, and a wide range of compatible Zaxis and EX series excavators. This is a brand‑new, factory‑spec seal – not an aftermarket substitute.
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Critical Transmission / Transfer Case Seal – This oil seal is a precision‑engineered sealing component installed in the transfer case / pump drive gearbox. It is designed to prevent the leakage of hydraulic fluid and gear oil from the unit, while simultaneously protecting internal components – bearings, gears, and shafts – from dust, moisture, and contamination. A failed seal will lead to progressive oil loss, contamination ingress, and eventual catastrophic failure of the transfer case.
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Premium FKM (Fluororubber) Construction – Manufactured from high‑quality FKM (fluororubber) material, specifically engineered for heavy‑duty hydraulic and transmission applications. FKM offers exceptional resistance to:
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High temperatures – withstanding operating temperatures up to 250°C
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Hydraulic fluids and gear oils – excellent oil resistance
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Abrasion and wear – maintains sealing integrity under continuous shaft rotation
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Weather and ozone – resists cracking and degradation from environmental exposure
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Precision Dimensions – The 4179833 oil seal has dimensions of approximately 50 × 55 × 78 × 12 mm, ensuring a precise fit in the transfer case housing and around the shaft.
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Restores Transmission / Transfer Case Integrity – Over time, oil seals harden, crack, or wear, leading to fluid leaks and contamination ingress. Replacing a faulty seal with this genuine OEM component restores proper sealing, prevents fluid loss, and extends the service life of the transfer case and associated components.
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Wide Compatibility Across Hitachi Zaxis and EX Series – This oil seal is compatible with a broad range of Hitachi excavator models, including:
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ZX Series: ZX330, ZX330-3, ZX330-3G, ZX330-5G, ZX330-5A, ZX330-HHE, ZX350H, ZX350H-3, ZX350K, ZX350K-3, ZX360H-3G, ZX370MTH, ZX500W
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ZAXIS Series: ZAXIS330LC, ZAXIS350LC-3, ZAXIS370
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EX Series: EX200, EX220, EX270, EX300, EX300-2, EX300-3, EX300-5, EX330LC-5, EX345USR, EX350H-5, EX370-5, EX385USR
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Pre‑Shipment Visual Verification – Before packing, we send you detailed high‑resolution photographs of the actual seal (part number markings, condition, overall quality). You approve shipment – we never ship blind. Video inspection is also available upon request.
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Fast Delivery – 5–7 working days lead time from our Guangzhou warehouse. Flexible shipping options including DHL, TNT, UPS, FedEx, and sea freight.
2. Applications
The Hitachi 4179833 transfer case oil seal is a critical sealing component for ZX330, ZX330-3, ZX330-5G, ZX330-5A, and compatible excavators used across a wide range of demanding job sites:
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Large‑Scale Open‑Pit Mining – ZX330 and ZX350 class excavators are 30–35 ton machines that work 20+ hour shifts in extreme conditions. The transfer case / pump drive gearbox operates under continuous high torque and heavy loads. A failed oil seal allows gear oil to leak out and contaminants to enter, leading to bearing failure and gear damage – a repair that costs thousands of dollars. This genuine seal ensures reliable sealing performance in the harshest mining environments.
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Quarrying & Aggregates – Loading trucks, stockpile management, and material handling in granite, limestone, and basalt quarries generate significant dust and vibration. The FKM construction of this seal provides excellent resistance to abrasion and contamination, ensuring reliable sealing performance shift after shift.
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Heavy Construction & Infrastructure – Highway excavation, dam building, bridge footings, and large‑scale earthmoving projects place sustained high loads on the transfer case. The seal’s high‑temperature resistance (up to 250°C) ensures reliable sealing even under continuous heavy operation.
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Equipment Rental Fleet – 30–35 ton excavators are high‑value rental assets. A genuine new oil seal ensures reliable transfer case sealing and prevents costly fluid leaks and component damage – avoiding mid‑rental breakdowns and customer complaints.
3. FAQ – Frequently Asked Questions
Q1: Is this oil seal an exact replacement for my Hitachi ZX330, ZX330-3, ZX330-5G, or ZX330-5A?
A: Yes. The 4179833 is a genuine Hitachi oil seal for the transfer case / pump drive gearbox used in ZX330, ZX330-3, ZX330-5G, ZX330-5A, and a wide range of compatible Zaxis and EX series excavators. To confirm compatibility for your specific machine, send us your machine serial number and a photo of the old seal – we will verify within 2 hours.
Q2: What is the function of this oil seal?
A: This oil seal is installed in the transfer case / pump drive gearbox to prevent the leakage of hydraulic fluid and gear oil from the unit, while protecting internal components – bearings, gears, and shafts – from dust, moisture, and contamination. A failed seal can lead to progressive oil loss, contamination ingress, and eventual catastrophic failure of the transfer case.
Q3: What are the dimensions of this oil seal?
A: The 4179833 oil seal has dimensions of approximately 50 × 55 × 78 × 12 mm.
Q4: What material is this oil seal made from?
A: This seal is manufactured from high‑quality FKM (fluororubber), which offers excellent resistance to high temperatures (up to 250°C), hydraulic fluids, gear oils, abrasion, and weathering.
Q5: Is this a new seal or a remanufactured unit?
A: It is brand new / genuine original, not remanufactured. The seal is manufactured to Hitachi‘s original specifications and meets all OEM performance standards.
Q6: What is the warranty on this seal?
A: The warranty period is 3 to 6 months depending on product details. We do not provide warranty service for genuine original parts. Our value is delivered up front: genuine OEM components, new‑condition seal, and pre‑shipment visual verification. For customers who require a warranty‑covered option, we can quote aftermarket alternatives – ask our sales team.
Q7: How long does delivery take?
A: Delivery is 5–7 working days after order confirmation. Flexible shipping options including DHL, TNT, UPS, FedEx, and sea freight are available.
Q8: What payment methods do you accept?
A: We accept T/T (wire transfer), Western Union, and PayPal.
Still have questions? Contact Hongtengda Parts – we reply within 24 hours.
