International Harvester TD-8G Crawler Dozer

The International Harvester TD-8G Crawler Dozer is a heavy-duty, hydrostatically driven dozer designed for exceptional grading, clearing, and site prep work. With a powerful engine and a dual-path hydrostatic transmission, the TD-8G delivers smooth, responsive operation and precise control — even on steep or uneven terrain. Introduced under the IH/Dresser badge, it marked a major upgrade in operator comfort, maneuverability, and hydraulic performance.

Engine & Powertrain:

• Engine: International DT-239, 4-cylinder diesel

• Displacement: 239 cu in (3.9 L)

• Net Power: 80 hp

• Cooling System: Liquid-cooled

• Transmission: Dual-path hydrostatic drive

• Steering: Controlled via levers or joystick (depending on model year)

• Max Travel Speed: ~6.8 mph

Hydraulic System:

• System Type: Open-center hydraulic system

• Pump Flow: Approx. 20 GPM

• Relief Pressure: 2,500 PSI

• Blade Control: Pilot-operated joystick or lever-operated valves

• Blade Options: Standard 6-way PAT blade or straight blade

Dimensions & Performance:

• Operating Weight: ~18,500–19,000 lbs

• Blade Width: 8 ft standard

• Ground Clearance: 14.5 in

• Track Gauge: 63 in

• Drawbar Pull: ~20,000 lbs

Maintenance Essentials:

• Frequent Service Tasks:

  • Hydrostatic system filter and fluid changes

  • Blade cylinder rebuild and line inspection

  • Track chain lubrication and roller service

• Common Issues:

  • Hydrostatic lag or surging: Rebuild with TD-8G hydrostatic pump kits

  • Hydraulic leaks at blade rams: Fix using TD-8G seal kits

  • Loose or sagging track: Adjust or replace TD-8G recoil springs and track adjusters

Pro Tips:

• Always bleed air from hydrostatic lines after hose replacements

• Use a filter minder on the hydraulic tank breather for early warning

• Don’t over-tighten track tension — it increases wear and strain on idlers

Serial Number Location:
Typically found on the left frame rail near the front idler or on a metal tag under the operator’s seat or dash panel.

Parts Support:
Shop high-quality IH TD-8G parts at BrokenTractor.com, including hydrostatic rebuild kits, hydraulic cylinders, and undercarriage components engineered for performance and durability.