Parts for Twin Disc® Marine Transmission

The Twin Disc® marine transmission is the heart of every vessel’s propulsion system. It doesn’t just enable forward and reverse motion; it precisely manages the synchronization of engine output with the propeller’s operation, ensuring smooth transitions, optimal speed control, and superior maneuverability. Whether you’re navigating inland waterways or operating in demanding offshore environments, a reliable marine transmission is vital.

Diesel Pro Power is proud to be the one-stop destination for Twin Disc® marine transmission parts, offering a comprehensive selection of components designed to keep your vessel operating at peak performance.

Why Choose Diesel Pro Power for Twin Disc® Marine Transmission Parts?

Diesel Pro Power stands out for several reasons:

• Vast Inventory: We stock an extensive range of Twin Disc transmission parts for both recreational and commercial marine applications.

• Fast Shipping: Our streamlined ordering process and dedicated logistics team ensure orders are processed and shipped quickly.

• Expert Support: Our knowledgeable customer service team is available to guide you in selecting the right parts for your needs.

• Competitive Pricing: We offer fair and transparent pricing, making it easier to maintain your fleet or vessel on budget.

Key Twin Disc® Marine Transmission Components

Rebuilt Twin Disc® Transmissions: Performance and Reliability

At the top of the list are our rebuilt Twin Disc transmissions. Rebuilt units are a cost-effective alternative to brand-new transmissions, offering the same high performance and durability. These rebuilt systems are remanufactured to precise specifications, using genuine components, ensuring like-new performance at a fraction of the cost.

Gear Ratios and Their Importance

The gear ratio of a marine transmission is crucial because it determines the number of times the input shaft rotates compared to the output shaft. Different gear ratios allow operators to balance speed, torque, and fuel efficiency:

• High Gear Ratios (e.g., 4.5:1 to 7.5:1): Deliver higher torque for applications where pulling power is critical, such as towing or heavy-load transport.

• Lower Gear Ratios (e.g., 1.5:1 to 4.5:1): Provide higher output speeds for vessels prioritizing speed and agility.

Our rebuilt Twin Disc MG 509 transmissions are available in gear ratios from 1.5:1 to 4.5:1, while the MG 520 modelscome with gear ratios ranging from 4.5:1 to 7.5:1.

Overhaul Plate Kits, Gaskets, Seals, Bearings, Oil Pumps, and Rubber Blocks: Vital Components for Twin Disc® Transmission Longevity

Overhaul Plate Kits: Restoring Performance and Extending Service Life

Overhaul plate kits are critical for ensuring your Twin Disc® marine transmission operates at peak efficiency and longevity. These kits include a complete set of replacement clutch plates, available in both brass and steel compositions.

• Brass Plates: Renowned for their superior resistance to corrosion and high thermal conductivity. Ideal for marine applications where saltwater exposure and high operational temperatures are common. Brass plates provide smooth engagement, reduce wear on mating components, and offer quieter performance.

• Steel Plates: Designed for strength and durability, steel plates offer exceptional resistance to deformation under high torque loads. These are perfect for high-powered vessels or commercial applications requiring maximum clutch strength and minimal downtime.

Over time, even the highest-quality clutch plates degrade due to continuous exposure to engine torque, thermal cycling, and friction. Regular replacement with a Twin Disc overhaul plate kit ensures:

• Consistent Power Transfer: Prevents slippage and maintains propulsion efficiency.

• Reduced Noise and Vibration: Fresh plates enhance smooth engagement and reduce operational noise.

• Extended Transmission Life: Minimizes stress on surrounding components, preserving the health of the transmission system.

We offer overhaul plate kits tailored for popular Twin Disc models like MG 5075, with a selection of kits for both standard and heavy-duty applications.

Gaskets: Precision Sealing for Leak Prevention

Gaskets are the unsung heroes of marine transmissions, ensuring airtight and fluid-tight seals between mating surfaces. In a Twin Disc transmission, these seals are essential to prevent oil leaks that can lead to hydraulic failure and transmission damage.

Our gasket sets for Twin Disc models are engineered to:

• Resist High Pressure and Temperature: Crafted from durable materials designed to withstand the harsh marine environment.

• Prevent Oil Leakage: Maintains optimal hydraulic pressure, crucial for clutch engagement and gear operation.

• Protect Internal Components: Keeps contaminants out, preserving the longevity of gears and bearings.

Diesel Pro Power’s inventory includes complete gasket kits for models like MG 509, MG 521, and MG 527, making it easy to complete a comprehensive overhaul or targeted repair.

Seals: Critical Barriers Against Contamination

Transmission seals play a pivotal role in Twin Disc systems by creating robust barriers that:

• Keep Fluids In: Retain transmission oil under high pressure, ensuring consistent lubrication and hydraulic performance.

• Keep Contaminants Out: Protect sensitive internal components from water, salt, dirt, and debris—common hazards in marine environments.

• Support Thermal Stability: Help maintain optimal transmission temperatures, minimizing the risk of overheating and wear.

Our seals inventory includes options for a broad range of Twin Disc models, including standard seals and seals with dust lips for extra protection. The dust lip provides an additional layer to block contaminants from infiltrating the transmission case, extending service life even in harsh operating conditions.

Bearings: Smooth and Reliable Power Transfer

Bearings are fundamental to the smooth operation of your Twin Disc transmission. They support rotating shafts, reduce friction, and ensure precise alignment of internal components.

Our bearing kits include:

• High-Quality Roller and Ball Bearings: Engineered for durability and smooth operation under extreme loads.

• Matched Sets for Quick Installation: Ensures correct fitment for specific Twin Disc models.

• Enhanced Load Distribution: Reduces localized stress on shafts and gears, extending the lifespan of your transmission.

Available for models like MG 5111, MG 5114, MG 514, MG 516, and more, these kits make overhauls and routine maintenance efficient and effective.

Oil Pumps: The Lifeline of Your Transmission

The oil pump in a Twin Disc transmission is the heartbeat of the system, circulating transmission fluid to lubricate and cool gears, clutches, and bearings. A malfunctioning oil pump can lead to catastrophic transmission failure.

Our Twin Disc oil pumps are:

• Precision-Engineered: Designed to maintain consistent oil flow under varying RPMs and operating conditions.

• Durable and Reliable: Constructed from high-quality materials resistant to corrosion and wear.

• Model-Specific: Available for a wide range of Twin Disc transmissions, ensuring perfect fit and optimal performance.

Timely oil pump replacement or upgrade ensures your transmission stays cool, lubricated, and performing at its best—essential for long-distance voyages and high-demand commercial operations.

Rubber Blocks and Couplings: Reducing Vibration and Protecting Components

Rubber blocks and couplings absorb the vibrations and shocks generated between the engine and transmission, safeguarding the drivetrain and extending the life of connected components.

• Couplings: Made from resilient materials to buffer vibrations, reduce noise, and protect the gearbox from torque spikes.

• Rubber Blocks: Function as thrust absorbers and vibration dampeners, minimizing structural stress on the transmission housing and hull.

Our range of Twin Disc rubber blocks and couplings includes options for models such as MG 5111, MG 5114, MG 514, MG 521, and more, ensuring compatibility with your specific vessel setup. These components are essential for smooth, reliable operation, especially under heavy loads or in rough sea conditions.

Twin Disc® Marine Transmission Parts Catalog

At Diesel Pro Power, we offer a comprehensive selection of Twin Disc marine transmission parts designed to keep your vessel running smoothly, efficiently, and reliably. Whether you operate a pleasure craft, commercial vessel, or a high-performance workboat, maintaining a fully functional transmission is critical to safety and performance.

This detailed catalog covers key Twin Disc transmission models, highlighting essential replacement parts such as overhaul plate kits (brass and steel), gaskets, seals, bearing kits, oil pumps, and rubber blocks. These components work together to ensure optimal transmission function, minimal downtime, and extended equipment life.

Twin Disc MG-502 Parts Catalog

• Overhaul Plate Kit (Brass and Steel): High-quality clutch plates for restoring clutch efficiency and transmission responsiveness.

• Gasket Set: Complete kit ensuring leak-proof seals.

• Seal Kit: Protects against fluid leaks and contaminants.

• Bearing Kit: Reduces friction and supports rotating elements.

• Oil Pump: Provides essential lubrication and cooling.

• Rubber Blocks: Absorb vibrations, enhance comfort, and reduce structural stress.

Twin Disc MG-5050 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-506 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5061 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5065 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-507 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5075 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-509 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5090A Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5091 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5111 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5111A Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5114 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-5114A Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-514B Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-514C Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-516 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-518 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-520 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-521 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-527 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Twin Disc MG-540 Parts Catalog

• Overhaul Plate Kit (Brass and Steel)

• Gasket Set

• Seal Kit

• Bearing Kit

• Oil Pump

• Rubber Blocks

Key Marine Transmission Support Components

Gasket Sets: Essential for Leak Prevention

Gasket sets play a crucial role in preventing leaks and maintaining compression between mating surfaces. Our complete gasket sets for Twin Disc marine transmissions include all necessary gaskets for rebuilding or overhauling the unit.

Bearings: Smooth and Reliable Rotation

Bearings ensure smooth rotation of the shafts within the transmission. High-quality bearings reduce friction, distribute loads evenly, and extend the service life of your transmission. Diesel Pro Power stocks a full range of bearings suitable for Twin Disc models, ensuring your transmission operates at peak performance.

Oil Pumps: Reliable Lubrication

The oil pump in a Twin Disc transmission ensures continuous circulation of transmission fluid, reducing friction and maintaining optimal operating temperatures. A failing oil pump can cause catastrophic transmission failure, so timely replacement is essential. Diesel Pro Power offers durable, high-quality oil pumps to keep your transmission protected and operational.

Why Rebuilt Transmissions Are the Smart Choice

Opting for a rebuilt Twin Disc transmission is a savvy decision for cost-conscious vessel operators. Benefits include:

• Significant Cost Savings: Rebuilt units cost less than new ones while delivering comparable performance.

• Environmentally Responsible: Reduces waste by reusing core components.

• Guaranteed Quality: Rebuilt to factory specifications using genuine parts.

Diesel Pro Power: Your Trusted Partner for Twin Disc®

At Diesel Pro Power, we’ve served over 40,000 satisfied customers worldwide. Our extensive inventory, combined with exceptional customer support, makes us the preferred choice for marine transmission solutions. Whether you need a full transmission, a clutch kit, or individual components, we have you covered.

Additional Services and Support

• Expert Consultation: Need help selecting the right part? Our experienced staff is ready to assist.

• Fast Shipping Worldwide: We ship orders promptly, ensuring minimal downtime for your vessel.

• Hassle-Free Returns: Not satisfied with your purchase? Our easy return policy has you covered.

Easy Payment and Fast Fulfillment

Diesel Pro Power offers a variety of payment options, including wire transfers and U.S. dollar payments. Orders are processed within 24 hours, with fast shipping options to keep your vessel moving. You can also pre-pay taxes and import fees to avoid delays upon delivery.