ZF 500438 – Clutch, Gasket & Seal Kit for ZF12M, ZF15M, HBW125, HBW150 Gearboxes

ZF 500438 – Clutch, Gasket & Seal Kit for ZF12M, ZF15M, HBW125, HBW150 Gearboxes

The ZF 500438 Clutch, Gasket & Seal Kit is a complete overhaul solution for ZF Hurth marine gearboxes, specifically designed to fit ZF12M, ZF15M, ZF15MA, HBW125, HBW150, and HBW150A models. This original ZF kit includes all essential sealing elements, clutch packs, and hardware required for smooth, leak-free, and efficient gearbox operation.

Manufactured from marine-grade elastomeric materials and precision steel components, the kit is optimized for demanding marine environments. It helps prevent fluid leaks, ensures proper clutch engagement, and extends the operational lifespan of the gearbox during routine maintenance or full rebuilds.

Key Features:

• OEM-grade kit compatible with ZF Hurth gearbox models: ZF12M, ZF15M, ZF15MA, HBW125, HBW150, HBW150A
• Includes 8 inner and 8 outer clutch discs, full sealing set, gaskets, springs, shims, and shaft keys
• Restores clutch function and prevents fluid loss in critical transmission areas
• Engineered for high-resistance to saltwater, heat, and wear
• Ideal for complete gearbox rebuilds, regular service, or preventive maintenance

Kit Contents:

• 1× Shift Cover Sealing Ring – 0634 502 009
• 1× Intermediate Shaft O-Ring – 0634 303 118
• 2× Drain Plug / Dipstick Sealing Rings – 3306 301 016
• 4× Cover Gaskets – 3306 301 014
• 1× Shifting Cover Gasket – 3306 301 015
• 1× Input Shaft Sealing Ring – 0634 301 833
• 1× Output Shaft Sealing Ring – 0634 300 466
• 2× Thrust Washers – 3306 304 029
• 8× Inner Clutch Discs – 3306 304 027
• 8× Outer Clutch Discs – 3306 304 031
• 3× Disc Carrier Springs – 3306 304 024
• 2× Output Shaft Keys – 3306 304 007
• 6× Clutch Pack Shims:
  • 2× 0.30 mm – 3306 304 034
  • 2× 0.40 mm – 3306 304 035
  • 2× 0.50 mm – 3306 304 036
• 6× Shaft Shims:
  • 2× 0.10 mm – 3304 302 011
  • 2× 0.15 mm – 3304 302 012
  • 2× 0.30 mm – 3304 302 014

Specifications:

Benefits:

• All-in-one rebuild kit for full gearbox service
• Reduces downtime and ensures long-lasting reliability
• Restores OEM clutch operation and gear engagement
• Protects against leaks, contamination, and mechanical wear
• Precision-engineered for exact fit, reducing installation time
• Cost-effective vs. individual component purchase