Caterpillar 789D Diff

Description

OEM-Quality Caterpillar 789D Differential Assembly

Restore peak driveline torque transfer and power balancing across your mining haul fleet with a heavy-duty Caterpillar 789D Differential Assembly. Engineered specifically for Caterpillar’s 200-ton class (181-tonne nominal payload) off-highway mining trucks, this differential unit transfers rotational power from the main transmission output shaft to the rear axle shafts, balancing wheel speeds during turns and uneven haul road navigation.

Built with Caterpillar’s heavy-duty spiral bevel crown wheel and pinion architecture, this differential unit absorbs severe torsional shock loads while delivering smooth power multiplication to the 789D’s outer planetary final drives.

Key Features & Benefits

• Precision Spiral Bevel Gearing: Forged, heat-treated alloy steel ring and pinion gear set built to handle continuous high-torque loads with minimal tooth face wear.

• Full-Floating Axle System: Isolates the differential carrier from vehicle weight and chassis flex, ensuring axle shafts carry rotational torque only.

• Optimized Thermal Passages: Engineered with internal high-flow oil galleries to continuously lubricate carrier bearings, spider gears, and pinion bearings during steep grade climbs.

• Integrated Traction Control (TCS) Compatibility: Works seamlessly with Caterpillar’s electronic braking and traction control systems to eliminate individual wheel slip on wet bench cuts.

• Direct OEM Frame & Housing Bolt-In: Precision-machined to exact Caterpillar 789D factory tolerances for seamless drop-in replacement into standard rear axle housing groups.

Verified Technical Specifications