Twin Disc MG 514C Marine Transmission Parts - Bearing Kit Section

Twin Disc MG514C Marine Transmission Parts – Bearing Kit Catalog

The Twin Disc MG514C marine transmission is a powerful, heavy-duty marine gearbox built for vessels that demand smooth, consistent torque and exceptional reliability under load. Found in commercial workboats, ferries, and offshore support vessels, the MG514C delivers the durability and precision that Twin Disc is known for. Maintaining this performance over years of operation requires using only the highest quality replacement components — and that’s where the MG514C bearing kit and related parts from Diesel Pro Power come in.

This catalog section highlights the complete bearing kit, gasket and seal kit, and other essential service components that ensure your MG514C gearbox continues to operate at peak efficiency.

Complete Bearing Kit for Twin Disc MG514B and MG514C Marine Transmissions

The Twin Disc MG514C Bearing Kit includes every precision bearing required to support the transmission’s internal rotating assemblies. These bearings carry the high torque loads transmitted through the gearbox, ensuring consistent alignment and minimal wear during heavy operation.

• Compatibility: Designed for both MG514B and MG514C models.

• Purpose: Replaces all internal bearings that stabilize the input and output shafts, gear clusters, and clutch assemblies.

• Durability: Manufactured from premium, high-strength bearing steel designed to handle marine-grade stresses and prolonged service life.

• Performance: Reduces internal friction, ensures consistent oil film retention, and restores the gearbox to its original smooth-running condition.

When bearings begin to degrade, operators may notice increased noise, vibration, or heat buildup within the transmission. Installing a complete bearing kit restores proper alignment and extends the operational life of all related components — including gears, seals, and clutch plates.

Gasket and Seal Kit for Twin Disc MG514C

The gasket and seal kit is an essential companion to the bearing set. This complete collection of gaskets, O-rings, and oil seals ensures your MG514C remains properly sealed and lubricated after service.

• Applications: Compatible exclusively with Twin Disc MG514C transmissions.

• Function: Prevents oil leaks, protects against saltwater intrusion, and maintains internal pressure balance.

• Composition: Made from marine-grade, oil- and heat-resistant materials to withstand extended use in high-load environments.

• Recommended Use: Should be installed during any major transmission rebuild or bearing replacement for maximum protection.

By replacing all gaskets and seals together with bearings, marine operators prevent contamination and improve the long-term reliability of the MG514C gearbox. A properly sealed transmission minimizes oil consumption and eliminates the risk of premature wear caused by fluid loss.

Twin Disc MG514 Ring Drive

The ring drive plays a vital role in coupling the MG514 series gearbox to the vessel’s engine housing.

• Compatibility: Fits MG514B and MG514C transmissions.

• Specification: Designed for SAE #1 housing size.

• Purpose: Provides a secure interface between the transmission input and engine output, maintaining precise alignment under torque.

This part is critical when performing a complete overhaul or replacing the connection assembly. A new ring drive ensures vibration-free operation and protects against misalignment damage between the engine and gearbox.

Spring for Twin Disc MG514 Marine Transmission

The spring used in the MG514 transmission supports internal clutch actuation and gear engagement systems.

• Application: Designed for the Twin Disc MG514 gearbox.

• Function: Maintains proper clutch pressure, allowing consistent shifting performance.

• Importance: Replacing weakened or corroded springs during service helps maintain smooth, responsive transmission function.

Even a small component like this can have a big impact on operational reliability, ensuring the clutch applies evenly and disengages correctly.

Sleeve for Twin Disc MG514 Marine Transmission

The sleeve used in the MG514 transmission provides accurate shaft support and maintains alignment between moving components.

• Material: Made from wear-resistant steel for long service life.

• Function: Protects internal shafts and bearing seats from friction damage.

• Recommendation: Replace during bearing service to maintain ideal fitment and prevent shaft scoring.

This small but essential component ensures your gearbox maintains its original mechanical tolerances.

Rubber Block for Twin Disc Marine Gears

The rubber block is designed to absorb vibration and torque shock between the transmission and the vessel’s drive assembly.

• Compatibility: Fits multiple Twin Disc models, including MG5111, MG5111A, MG5114, MG5114A, MG514A/B/C, MG516, MG518, MG521, and MG527.

• Purpose: Acts as a vibration damper, extending the life of both the transmission and drivetrain.

• Material: Constructed from durable marine-grade rubber compounds that resist oil, fuel, and heat exposure.

Replacing worn rubber blocks ensures smooth power transfer and reduces mechanical stress on surrounding components.

Twin Disc MG514C Oil Filter Strainer

The oil filter strainer helps maintain clean transmission fluid, preventing debris from damaging internal parts.

• Application: Designed specifically for the MG514C marine gearbox.

• Function: Filters contaminants to ensure consistent lubrication and hydraulic performance.

• Benefit: Regular replacement extends the life of bearings, clutches, and gears by maintaining optimal oil cleanliness.

Clean oil is vital for preventing premature wear, making the oil strainer a key part of any gearbox service.

Why Buy from Diesel Pro Power

When it comes to maintaining your Twin Disc MG514C marine transmission, Diesel Pro Power is the trusted global source for authentic, precision-fit replacement parts. With over 40,000 satisfied customers in more than 180 countries, Diesel Pro Power offers unparalleled service, selection, and expertise.

Here’s why professionals rely on Diesel Pro Power:

• Complete Inventory: From full bearing kits and gasket sets to individual components like sleeves, rubber blocks, and filters, everything you need for the MG514C is available in one place.

• Quality You Can Trust: Every part meets or exceeds OEM quality standards for performance and reliability.

• Expert Guidance: Our specialists understand Twin Disc transmissions and can help you find the exact part for your gearbox model.

• Global Shipping: Fast, secure delivery to shipyards, ports, and repair centers in 180 countries.

• Proven Reputation: Decades of experience supplying marine transmission parts to fleets and independent operators worldwide.

When you order your MG514C bearing kit or related components from Diesel Pro Power, you’re choosing a partner dedicated to keeping your vessel running smoothly, efficiently, and reliably — wherever your operations take you.