Restoring an Eimco Dozer and Preserving a Forgotten Legacy

[MikePhua]

The Rise and Decline of Eimco Equipment
Eimco, originally known for its mining and tunneling machinery, was a Utah-based manufacturer that ventured into earthmoving equipment during the mid-20th century. While never a dominant force in the dozer market like Caterpillar or Allis-Chalmers, Eimco produced a series of compact and mid-size crawler tractors that gained a cult following among operators who appreciated their simplicity and visibility. The company’s designs often featured unconventional layouts, including forward-mounted operator stations and exposed drivetrains, which made them stand out visually and functionally.
By the 1980s, Eimco’s presence in the dozer segment had faded, and their machines became rare sightings on job sites. Today, surviving units are considered collector-grade, with restoration projects driven more by passion than practicality.
Terminology Annotation
- ROPS (Roll-Over Protective Structure): A safety frame designed to protect the operator in case of a rollover.
- Detroit Diesel 6V-71: A two-stroke V6 engine known for its high-pitched whine and robust torque, commonly used in mid-century industrial equipment.
- Track Frame: The structural assembly that supports the track system, including rollers, idlers, and sprockets.
- Blade Wear Pattern: The visual and physical condition of the dozer blade, often used to assess usage history and operator habits.
Restoration Challenges and Mechanical Observations
One operator in Indiana began restoring an Eimco dozer that had been sitting idle for years. Despite its age, the machine ran well, powered by a Detroit 6V-71 that “rolled dirt over the blade” with ease. The blade showed moderate wear, and the foot pedals and levers were intact—often a sign that the machine hadn’t been abused. Track repairs were needed, but the bulk of the restoration was cosmetic.
The machine’s unique forward operator station offered excellent visibility of the blade, a feature praised by many who ran Eimcos in the past. However, backing up was a challenge due to the layout, and the noise from the straight-piped Detroit engine required a steady supply of earplugs.
A Story from the Brushline
In Arizona, a retired operator recalled pushing through dense brush with an Eimco dozer. The open cab design gave him a front-row seat to the action—sometimes too close. He joked that having a monkey or snake drop into your lap was “the most excitement you could have with your clothes on.” Despite the exposure, the visibility and blade control were unmatched. After a 12-hour shift, the ringing in his ears from the Detroit engine would linger well into the night.
Cab Modifications and Operator Safety
The original machine featured a homemade cage that drew mixed reactions. Some considered it unsightly and unnecessary, given that ROPS were not standard in that era. Others argued that any protection was better than none, especially when working in hazardous terrain. While the cage may have compromised aesthetics, it likely added a layer of safety for the operator.
Modern restorers often face the dilemma of preserving historical accuracy versus upgrading safety. Recommendations include:

• Installing a certified ROPS if operating in active job sites
  
• Retrofitting LED lighting for visibility without altering the frame
  
• Adding vibration-dampening mounts to reduce operator fatigue
  
• Using acoustic insulation to mitigate engine noise
  

Parts Availability and Historical Documentation
Finding parts for Eimco dozers is a challenge. One mechanic in Arizona reported owning several units, including a working 103C, and had accumulated manuals and historical data. These resources are invaluable for restorers, as factory support no longer exists. Networking with other owners and mechanics is often the only way to source components or verify specifications.
Common replacement needs include:

• Track pads and rollers
  
• Hydraulic seals and hoses
  
• Engine mounts and exhaust components
  
• Electrical wiring and gauges
  

Some restorers fabricate parts from scratch or adapt components from other brands, such as International Harvester or Allis-Chalmers, which shared similar drivetrain elements.
Preservation and Community Interest
Despite their rarity, Eimco dozers continue to spark interest among enthusiasts. Their unconventional design, robust engines, and historical significance make them worthy restoration candidates. Online communities and equipment forums serve as hubs for sharing progress, troubleshooting, and sourcing parts.
Operators who ran Eimcos in the past often speak fondly of their visibility, simplicity, and raw power. While not refined by modern standards, these machines embodied a rugged practicality that still resonates today.
Conclusion
Restoring an Eimco dozer is more than a mechanical project—it’s a tribute to a forgotten chapter in earthmoving history. With patience, ingenuity, and a bit of ear protection, these machines can be brought back to life, offering a glimpse into the grit and character of mid-century industrial design. Whether pushing dirt or parked in a shed, an Eimco dozer remains a symbol of hands-on engineering and the enduring spirit of those who refuse to let history rust away.