International Harvester TD-7H Crawler Dozer

The International Harvester TD-7H Crawler Dozer is a refined, hydrostatic-drive crawler developed under the Dresser and later Dressta branding. Known for its excellent balance, responsiveness, and modernized controls, the TD-7H excels in grading, fine finish work, and tight jobsite maneuverability. With enhanced visibility, pilot-operated hydraulics, and improved service access, the TD-7H remains a go-to dozer for municipalities and contractors alike.

Engine & Powertrain:

• Engine: Cummins 4BT 3.9L, 4-cylinder turbocharged diesel

• Displacement: 239 cu in (3.9 L)

• Net Power: 80 hp

• Cooling System: Liquid-cooled

• Transmission: Dual-path hydrostatic drive

• Steering: Independent track control via joystick or lever

• Max Travel Speed: ~6.8 mph

Hydraulic System:

• System Type: Load-sensing, open-center

• Pump Flow: Approx. 20 GPM

• Relief Pressure: 2,500 PSI

• Blade Control: Pilot-operated joystick

• Blade Options: 6-way PAT (standard)

Dimensions & Performance:

• Operating Weight: ~18,000 lbs

• Blade Width: 8 ft (standard), optional 8.5 ft

• Ground Clearance: 14.5 in

• Track Gauge: 63 in

• Drawbar Pull: Over 20,000 lbs

• Turning Radius: Near zero (due to hydrostatic steering)

Maintenance Essentials:

• Service Focus Areas:

  • Hydrostatic fluid filters and charge pump screens

  • Hydraulic cylinder seal replacement

  • Undercarriage tension and wear parts

• Common Issues:

  • Joystick drift or control lag: Check pilot valve or replace with TD-7H control valve parts

  • Cylinder seal wear: Fix with TD-7H hydraulic seal kits

  • Track sag or weak recoil spring: Adjust or replace TD-7H track adjusters

Pro Tips:

• Inspect pilot control linkage quarterly to avoid feedback delay

• Bleed air from hydrostatic lines after hose replacement to prevent jerky movement

• Always use high-quality hydraulic fluid compatible with pilot-operated systems

Serial Number Location:
Stamped on the left side of the front frame rail or on a data plate inside the cab, near the operator’s left knee area.

Parts Support:
Find genuine TD-7H crawler dozer parts including hydrostatic components, pilot valve rebuild kits, and blade cylinders at BrokenTractor.com.