April 1, 2025
Required Tools For Twin Disc MG520 Marine Gear
Specialty Tools
1. Bearing Pullers and Splitters
2. Alignment Tools
3. Seal and Bushing Drivers
4. Dial Indicator with Magnetic Base
5. Snap Ring Pliers
6. Feeler Gauge Set
7. Oil Sampling Pump (Optional)
Common Tools
1. Torque Wrenches
2. Standard and Metric Socket/Wrench Sets
3. Pry Bars and Soft Mallets
4. Screwdrivers and Picks
5. Inspection Mirror and Flashlight
6. Thread Chasers and Tap Sets
7. Gasket Scraper
Lifting & Hoisting Equipment For Twin Disc MG520 Marine Gear
Recommended Lift Points on MG520
Installation of Lifting Eyes
Engine Hoists and Lifting Devices
Safety Practices During Lifting
Workstation Setup for MG520 Overhaul
1. Clean Workbenches
2. Controlled Environment
3. Access to Manuals and Diagrams
4. Dedicated Cleaning Area
Conclusion: Prepare Like a Pro for Successful MG520 Service
Videos About Twin Disc Transmissions
Read More
April 1, 2025
Personal Protective Equipment (PPE) For Twin Disc MG520 Marine Gear
Safety Gear Required
Proper Ventilation and Lighting in the Workspace
Lockout/Tagout Procedures For Twin Disc MG520 Marine Gear
Step 1: Shutting Down the Engine
Step 2: Disconnecting Power and Hydraulic Pressure
Tagout Documentation
Fire and Environmental Safety For Twin Disc MG520 Marine Gear
Safe Handling and Disposal of Lubricants
Fire Prevention Measures
Environmental Compliance Onboard
Conclusion: Safety is the Foundation of Effective Marine Gear Maintenance For Twin Disc MG520 Marine Gear
Videos About Twin Disc Transmissions
Read More
April 1, 2025
Overview of the MG520 and Its Applications in Marine Vessels
Key Features and Technical Capabilities For Twin Disc MG520 Marine Gear
1. Heavy-Duty Construction
2. High Torque Capacity
3. Hydraulic Clutch Actuation
4. Multiple Gear Ratios
5. Output Rotation Options
6. Power Take-Off (PTO) Capabilities
7. Oil Cooling and Lubrication System
8. Optional EC300 Electronic Control Compatibility
Importance of Regular Maintenance For Twin Disc MG520 Marine Gear
Why Maintenance Matters
Key Maintenance Activities to Prioritize
Maintenance Schedule Overview (General Reference)
Disclaimer: Refer to the OEM Service Manual for Detailed Procedures and Torque Specifications For MG520 Marine Gear
Conclusion: Laying the Foundation for Successful MG520 Service
Videos About Twin Disc Transmissions
Read More
April 1, 2025
Personal Protective Equipment (PPE)
Lockout/Tagout Procedures
Fire and Environmental Safety
Required Tools
Lifting & Hoisting Equipment
Routine Inspection Checklist
Fluid Change Procedure
Common Operational Issues
Diagnostic Steps
Initial Preparation
Component Disassembly
Bearings and Shafts
Clutch Pack
Seals and Gaskets
Best Practices for Reassembly
Seal and Gasket Installation
Aligning Transmission with Engine
Hydraulic and Electrical Connections
Functional Testing
Recommended Replacement Parts
Diesel Pro Power Aftermarket Options
Recommended Service Intervals
Service Log Templates
Technical Support
Conclusion: Mastering Your Twin Disc MG520 Marine Gear Maintenance
Videos About Twin Disc Transmissions
Read More
April 1, 2025
Introduction
A. General and Specifications
1. What is the Twin Disc MG516 marine gear?
2. What’s the difference between MG516 and MG5161?
3. What is the typical gear ratio?
4. What is the dry weight of the MG516?
5. What are the overall dimensions?
6. What is the recommended operating oil pressure?
7. What is the oil capacity?
B. Operation
8. Can it be shifted under load?
9. How is it controlled?
10. Does it have a neutral position?
11. What type of vessel is it best for?
12. Is it suitable for twin engine applications?
C. Oil and Fluid Management
13. What type of oil should I use?
14. Can I use synthetic oil?
15. How often should the oil be changed?
16. How do I check the oil level?
17. What if the oil is milky?
D. Maintenance & Inspection
18. How often should I replace the oil filter?
19. What’s the best way to inspect clutch wear?
20. Should I use additives?
21. What are signs of cooler failure?
22. How do I rotate the shaft in storage?
23. How do I winterize the MG516?
E. Troubleshooting
24. Why does the transmission slip in gear?
25. Why is there a delay when shifting?
26. What does it mean if there's no drive in forward or reverse?
27. My oil is foamy—what should I do?
28. What causes high transmission temps?
29. Why does the transmission vibrate under load?
30. I have pressure in neutral, but none in gear—why?
F. Valve & Control System
31. What type of solenoid is used?
32. How do I test a solenoid?
33. Can the MG516 be manually shifted?
34. Why are shifts jerky?
G. Rebuild & Replacement
35. When should I rebuild the MG516?
36. What does a rebuild include?
37. How long does a rebuild take?
38. When should I replace rather than rebuild?
39. Where can I buy a rebuild kit?
40. Do I need special tools for rebuild?
H. Storage and Lay-Up
41. How do I store the MG516 for long periods?
42. Should I remove the cooler during storage?
43. Can I store the MG516 outdoors?
44. How do I recommission after storage?
I. Parts & Sourcing
45. Where can I get replacement filters?
46. Do I need the transmission serial number?
47. Are aftermarket parts as good as OEM?
48. Can I upgrade the MG516 for higher output?
J. Performance and Upkeep
49. How long does the MG516 last?
50. What’s the best way to extend service life?
Final Word
Videos About Twin Disc Transmissions
Read More
April 1, 2025
Introduction
Preparing for Long-Term Lay-Up
Step-by-Step: Storage Preparation Process
✅ 1. Perform a Final Operation Test
✅ 2. Drain or Replace Oil
Option B: Fill with Clean Preservative Oil (Wet Storage)
✅ 3. Fogging and Internal Coating (Optional but Recommended)
✅ 4. Seal External Ports
✅ 5. Inspect and Protect External Surfaces
✅ 6. Mounting and Support
Fluid Recommendations and Corrosion Prevention
Preferred Storage Oil Types
Anti-Corrosion Additives
Cooler and Line Considerations
Periodic Maintenance During Storage
Weekly (Short-Term Storage Only)
Monthly
Quarterly
Annual
Additional Tips for Preserving the MG516 in Storage
Climate Control Considerations
Shaft Seal Protection
Electronic System Storage (if applicable)
Tagging and Documentation
Recommissioning After Storage
✅ 1. Inspect Exterior and Connections
✅ 2. Drain and Refill With Operational Oil
✅ 3. Install New Filter
✅ 4. Rotate Shaft Manually
✅ 5. Check Shaft Seals
✅ 6. Reconnect Cooler Lines and Prime
✅ 7. Conduct Initial Start-Up
✅ 8. Load Test
Summary: Storage, Preservation & Long-Term Maintenance for Twin Disc MG516 Marine Gear
Key Takeaways:
Videos About Twin Disc Transmissions
Read More
Free US Calls: 1-888-433-4735
International: 305-545-5588
