1991 Diedrich Drill D-120 For Sale in Beaver, WV

Make / Model: Diedrich D-120
Year: 1991
Carrier: Morooka Track Carrier
Engine: Mitsubishi Diesel
Hours: 6,612
Location: South Central US
Condition: Operational – Needs Attention

Overview

This 1991 Diedrich D-120 is mounted on a Morooka track carrier and presents an opportunity for a buyer looking for a larger drilling platform at an attractive price point. The rig is operational but has been sitting and will require some attention before returning to full-time service. The seller notes that the engine smokes on startup and describes the overall condition as fair.

The D-120 platform has long been known as a capable geotechnical and environmental drilling rig with excellent production capabilities and a strong reputation in the drilling industry.

Key Specifications

• 1991 Diedrich D-120
• Morooka track carrier
• Mitsubishi diesel engine
• Approximately 6,612 hours
• Main winch
• 308 water pump
• Track-mounted platform
• Operational machine

Condition

• Operational
• Not currently being used regularly
• Engine smokes during startup
• Overall condition rated fair by seller
• No other major issues reported

From the photos, the rig appears complete and relatively straight. It has the look of a machine that has been parked rather than worn out, making it a good candidate for reconditioning or a mechanical freshening before returning to daily production.

Why This Rig

• Proven Diedrich D-120 platform
• Morooka carrier offers excellent flotation and site access
• Simple, straightforward drilling package
• Good candidate for refurbishment
• Opportunity to buy a larger production rig without late-model pricing

Optional Reconditioning Available

This rig would be an excellent candidate for our reconditioning program at Drill Rig Marketplace.

Available services include:

• Complete mechanical inspection
• Engine diagnostics and repair
• Hydraulic repairs and hose replacement
• Electrical troubleshooting
• Pump servicing
• Sandblast and repaint
• Custom company colors and branding
• Full operational refurbishment packages

We can tailor the level of work to fit your budget, whether you're looking for a basic mechanical freshening or a complete rebuild and repaint.

Straight Talk

This isn't a turnkey rig. It's a project with potential.

The seller states it runs, operates, and the biggest issue known is startup smoke. The photos show a complete D-120 on a Morooka carrier that appears to have good bones and could be brought back to life with the right investment. If you're looking for a larger drilling platform and don't mind putting some time or money into it, this could be a very cost-effective way to get into a D-120. Better yet, we can run it through our shop, fix the issues, and paint it your company colors before it ever reaches your yard.

The Diedrich Drill D-120 is a drilling rig in the Diedrich Drills product line, designed for geotechnical, environmental, and foundation drilling applications. It is used for soil sampling, borehole drilling, and related subsurface investigation work. The D-120 is typically configured for track-mounted or truck-mounted operation depending on application requirements and may be equipped with hydraulic drill feed, rotary drilling components, and support systems for auger, hollow stem auger, and mud rotary methods. Diedrich drill rigs are known for field serviceability and adaptability across site investigation and construction drilling tasks.