Restoring the Galion 104 Serie A Motor Grader: Clutch Systems, Engine Specs, and Parts Sourcing

[MikePhua]

Introduction to the Galion 104 Serie A
The Galion 104 Serie A motor grader is a vintage piece of earthmoving equipment, often found in municipal fleets, rural road departments, and private construction yards. Built during the mid-20th century, this grader reflects a mechanical simplicity that appeals to restorers and operators who value durability over electronics. With a Cummins 160 six-cylinder engine and manual transmission, the 104 Serie A remains a viable machine when properly maintained—though sourcing parts like clutch assemblies can be a challenge.
Engine and Drivetrain Overview
The Galion 104 Serie A typically features:

• Engine: Cummins NH160, naturally aspirated, inline 6-cylinder diesel
  
• Horsepower: Approximately 160 HP
  
• Transmission: Manual gear-driven with dry clutch assembly
  
• Drive Configuration: Tandem rear axle with mechanical blade lift and articulation
  
• Serial Format: Example—104A-CC07377, indicating model and production sequence
  

This configuration was designed for grading gravel roads, shaping ditches, and maintaining rural infrastructure. The Cummins NH160 engine is known for its longevity and torque, though it lacks modern emissions controls.
Terminology Explained

• Dry Clutch: A clutch system that operates without oil immersion, relying on friction between the pressure plate and clutch disc.
  
• Clutch Facing Package: A set of friction materials bonded to the clutch disc to ensure smooth engagement.
  
• Drive Member: The component of the clutch that transmits torque from the engine to the transmission.
  

Clutch Assembly and Replacement Options
One of the most common maintenance challenges with the Galion 104 is clutch wear. Fortunately, parts are still available through specialty suppliers. For example:

• Complete Clutch Assembly: Part number CLA-2389-18
  
• Friction Plate (Drive Member): Part number UCL-41-3357-2
  
• Clutch Facing Package: Part number D-55315
  

These components are compatible with similar Galion models, such as the 118, and can often be sourced from suppliers like Fort Wayne Clutch or vintage equipment dealers.
Field Anecdote: A Mechanic’s Journey
In California, a mechanic acquired a Galion 104 Serie A and quickly discovered the clutch was slipping under load. Without a parts manual, he struggled to identify the correct replacement. After reaching out to fellow operators, he learned the part numbers and ordered a manual for reference. With the help of a local machine shop, he installed a new clutch assembly and returned the grader to service—grading ranch roads and firebreaks with renewed confidence.
Inspection and Installation Tips
When replacing the clutch on a Galion 104, consider the following:

• Inspect Flywheel Surface: Resurface if glazing or scoring is present.
  
• Check Pilot Bearing: Replace if worn to prevent transmission input shaft misalignment.
  
• Torque Specs: Follow manufacturer guidelines for pressure plate bolts to avoid warping.
  
• Clutch Linkage: Lubricate and adjust for proper pedal travel and engagement point.
  

Sourcing Parts for Vintage Equipment
Finding parts for older graders requires creativity and persistence:

• Specialty Suppliers: Companies that focus on vintage truck and industrial drivetrains often stock compatible clutch kits.
  
• Salvage Yards: Retired municipal graders may serve as donors for hard-to-find components.
  
• Online Forums and Collector Groups: Networking with restorers can yield leads on parts and manuals.
  
• Custom Fabrication: In cases where OEM parts are unavailable, machine shops can rebuild or replicate components.
  

Maintenance Recommendations
To extend the life of the clutch and drivetrain:

• Avoid Riding the Clutch: Keep pedal fully released during operation.
  
• Monitor for Slippage: If RPM rises without forward motion, inspect immediately.
  
• Service Linkage Annually: Clean and lubricate pivot points and adjust free play.
  
• Use Correct Gear Oil: Match viscosity to transmission specs for smooth shifting.
  

Conclusion: Preserving a Mechanical Workhorse
The Galion 104 Serie A may be decades old, but its mechanical design and rugged build make it a valuable tool for grading and road maintenance. With proper care and access to replacement parts—especially for the clutch system—this grader can continue serving for years to come. Whether restoring for personal use or keeping a legacy fleet alive, the key lies in understanding its components, sourcing intelligently, and honoring the craftsmanship of a bygone era.