ZF 500423 – Seal Kit for ZF63IV, ZF63V, HSW630V Marine Gearboxes

ID 1232681

1-2 weeks delivery time

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The ZF 500423 is a complete seal kit for ZF63IV, ZF63V, and HSW630V gearboxes. Includes shaft seals, piston rings, gaskets, and O-rings. Designed for full gearbox maintenance to prevent oil leaks and pressure loss. Made from marine-grade elastomeric materials.

Description
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ZF 500423 – Seal Kit for ZF63IV, ZF63V, HSW630V Marine Gearboxes

The ZF 500423 Seal Kit is a complete sealing solution designed to maintain and restore the performance of ZF63IV, ZF63V, and HSW630V marine gearboxes. This kit includes all essential components for a full seal replacement—helping to prevent oil leaks, maintain internal pressure, and protect the gearbox from contamination. Constructed from high-quality elastomeric materials, each component is engineered to withstand harsh marine conditions, including exposure to saltwater and temperature fluctuations.

Contents of the ZF 500423 Seal Kit:

1 × Input Shaft Seal (3312 301 030)
2 × Output Shaft Seals (0634 319 133, 0634 319 134)
1 × Gasket (3312 308 020)
1 × Seal (0634 309 621)
3 × Piston Rings (3312 302 041)
3 × O-Rings (0634 304 405, 0634 304 688, 0634 306 204)
1 × Gasket Set for HSW630V / ZF63V (3312 301 008)

Key Features:

Complete seal replacement kit for ZF63IV, ZF63V, and HSW630V gearboxes
Includes input/output shaft seals, piston rings, O-rings, and gaskets
Ensures leak-free performance and maintains internal gearbox pressure
Ideal for routine maintenance or full gearbox overhauls
All components made from marine-grade elastomers and sealing materials
Suitable for saltwater and freshwater marine environments

Specifications:

Part Number	ZF 500423
Compatible Models	ZF63IV, ZF63V, HSW630V
Included Seals	Input/Output Shaft Seals, O-Rings, Piston Rings, Gaskets
Materials	High-durability elastomers and gasket materials
Seal Functions	Prevents oil leaks, retains pressure, resists corrosion
Application	Marine propulsion systems
Installation	Direct fitment for hassle-free maintenance
Environment	Designed for saltwater, brackish, and freshwater use

Benefits:

Reduces risk of oil leaks and costly gearbox damage
Extends gearbox lifespan by maintaining internal seal integrity
Provides all necessary parts in a single kit for efficient service
High resistance to pressure, corrosion, and marine wear conditions
Ensures smooth, reliable operation of marine transmission systems
Cost-effective compared to sourcing seals individually