International Harvester TD-7 Crawler Dozer

The International Harvester TD-7 Crawler Dozer (original model, introduced in the early 1960s) is a mid-sized track-type tractor built for grading, pushing, and light-to-moderate earthmoving applications. As part of the classic TD (TracTracTor Diesel) series, the original TD-7 delivers dependable performance with a simple, rugged design that remains popular among restoration and small-contractor communities.

Engine & Powertrain:

• Engine: IH D206 4-cylinder diesel

• Displacement: 206 cu in (3.4 L)

• Gross Power: 62 hp

• Net Power: ~52 hp

• Cooling System: Liquid-cooled

• Transmission: 5-speed manual with dry clutch

• Final Drives: Bull gear and pinion

Hydraulic System:

• Pump Flow: ~12–14 GPM

• System Pressure: ~2,000 PSI

• Blade Control: Manual lever-controlled hydraulic valve

• Blade Options: Straight blade (S-blade) or angle blade

Dimensions & Operating Stats:

• Operating Weight: ~13,000–14,000 lbs

• Blade Width: 8 ft (standard angle blade)

• Track Gauge: 60 in

• Ground Clearance: 13 in

• Length (with blade): Approx. 130 in

• Travel Speed: Up to 5.5 mph

Maintenance Essentials:

• Routine Service Items:

  • Fuel filters, oil changes, air pre-cleaner maintenance

  • Blade hydraulic cylinder seals and hoses

  • Undercarriage track rollers and chain wear

• Common Issues:

  • Clutch wear/slipping: Fix with IH TD-7 clutch kits

  • Hydraulic leak at control valve or cylinders: Use TD-7 hydraulic seal kits

  • Track tension loss: Adjust with IH TD-7 track adjusters

Pro Tips:

• Always inspect the dry clutch for oil seepage from rear main seal

• Clean sediment bowl in fuel system frequently to avoid injector clogging

• Use a temperature gauge on hydraulic fluid during long grading jobs

Serial Number Location:
Serial number is typically stamped on the left-side frame near the front idler or on a data plate located by the operator’s left footrest.

Parts Support:
Get reliable IH TD-7 parts from BrokenTractor.com, including transmission rebuild kits, blade cylinders, undercarriage parts, and clutch systems for your vintage dozer.