4686321 Boom Cylinder Seal Kit for Hitachi ZX330-3G ZX350H-3G Excavators

Eliminate hydraulic fluid leaks and restore the powerful earthmoving capabilities of your excavator with the WINSCHEN premium 4686321 Boom Cylinder Seal Kit. Engineered specifically to withstand the extreme operational pressures, heavy payloads, and harsh environments of large-scale construction and mining, this high-quality aftermarket repair kit ensures your Hitachi Zaxis equipment operates safely and efficiently with zero pressure loss.

Key Features

Manufactured to strict OEM dimensions, ensuring a precise and seamless fit for the hydraulic cylinders used in heavy-duty Hitachi Zaxis-3G series excavators.
Constructed from advanced elastomeric and heavy-duty PTFE materials to provide exceptional resistance to high hydraulic pressure, continuous rod friction, and extreme thermal variations.
Effectively eliminates internal fluid bypass and external leakage, maintaining highly responsive hydraulic control and consistent mechanical force.
This comprehensive seal kit includes all essential precision components required for a complete and reliable cylinder overhaul, replacing multiple legacy seal part numbers in one convenient package.
A cost-effective, highly reliable aftermarket alternative that meets or exceeds original equipment standards, minimizing your machine’s routine maintenance downtime.

Compatible Equipment Models

Excavators: Crawler Excavators (Zaxis-3G Series): ZX330-3G, ZX350H-3G, ZX350K-3G, ZX360H-3G Hitachi

Seal Kit Related Parts

Part No	Qty	Parts name
0926814	1	Ring
0926815	1	Seal Packing
0926808	1	Retaining Ring
0492216	1	Seal Ring
TH104589	1	O-Ring
0482606	1	Ring
0833405	1	Cushion
0237218	1	Seal Ring
0482609	2	Ring
1102003	2	Ring
TH102826	2	Wear Ring

Specifications

Part Number	4686321
Part Type	Boom Cylinder Seal Kit / Service Kit
Application	Boom Cylinder Rebuild
Brand	WINSCHEN
Country of Origin	China
SKU	HIT-4686321
MOQ	1 SET
Delivery Time	1-3 business days

To ensure proper fitment, please verify your machine’s exact model and original hydraulic cylinder configuration with our support team prior to purchasing. We offer fast global shipping to keep your heavy machinery operating efficiently.

Related Hitachi Seal Kit Categories

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