Twin Disc MG518 Marine Transmission Parts - Gasket and Seal Kit Section

Twin Disc MG518 Marine Transmission Parts – Gasket and Seal Kit Section

The gasket and seal kit for the Twin Disc MG518 marine transmission is a complete sealing solution engineered to restore proper containment of transmission fluid and prevent oil leaks under heavy marine operating conditions. Over time, the gaskets, O-rings, and oil seals within the MG518 can degrade due to exposure to high temperatures, vibration, and oil contamination. This kit provides everything needed to reseal the transmission during a rebuild or service interval, helping restore full hydraulic pressure integrity and protect clutch performance.

Twin Disc Gasket and Seal Kit for Marine Gear MG518

This kit includes:

• Complete gasket set for all major housings and cover interfaces
  
  

• Oil seals for input and output shafts
  
  

• O-rings and washers for valve bodies and auxiliary covers
  
  

• Front and rear sealing rings to maintain pressure between case sections
  
  

These components are manufactured to precise tolerances, ensuring proper fit and compression when torqued to factory specifications. Marine technicians often install this kit during clutch overhaul or after detecting oil seepage at the shaft seals or gear housing joints. Replacing these seals helps prevent fluid loss that can lead to clutch slippage or reduced shifting performance.

Signs You May Need This Kit

• Transmission oil leaks at the output flange or bell housing
  
  

• Milky or contaminated oil from water intrusion
  
  

• Difficulty maintaining hydraulic pressure or engagement delay
  
  

• Residue around gaskets or inspection covers
  
  

Rubber Block for Twin Disc Marine Gears

The rubber block for the MG518 (26 are needed for this transmission)isolates torsional vibration between the transmission and engine. Over time, these blocks harden or crack, increasing vibration and wear on the drive coupling. Replacing them ensures smooth, balanced operation and protects internal clutch assemblies.

Why Buy Parts For Your Twin Disc MG518 From Diesel Pro Power

• Exact Fitment: Every kit is curated specifically for the Twin Disc MG518—no cross-brand substitutions.
  
  

• Marine-Tested Quality: Components meet or exceed Twin Disc OEM specifications.
  
  

• Fast Global Shipping: Trusted by over 40,000 satisfied marine customers worldwide.