Cat 789 Haul Truck Full Rebuild for OceanaGold Macraes - Timelapse

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Terra Cat is proud to have partnered with OceanaGold Macraes on a major project to resurrect three Cat 789C trucks.

The rebuild started with repairing the frames, including replacing the torque tube assembly. The front frame rails were extended to better support the front walkways and to provide additional protection to the bottom of the radiator and cooler group. The major change to the powertrain was the upgrade to the engine. The 789C trucks use a 1,900 horsepower 3516B (69 litre) engine, featuring a jacket water aftercooler system. This was replaced with a Cat Reman 789D 2,100 horsepower 3516C (78.1 litre) high displacement engine with an air-to-air aftercooler system.

The torque converter, transmission and other powertrain components were rebuilt by Terra’s Component Rebuild Centre in Christchurch to match the engine output. The rebuilt powertrain meets Cat-certified standards and is supported with a ‘like new’ warranty. To match the rebuilt powertrain, all the other systems on the truck were rebuilt or replaced including pumps, lines and hoses, cylinders, suspension, and wiring. This was completed with refurbished cabs. Through the rebuild process, and once assembled, the trucks go through extensive testing at Terra Cat.

They’re then returned to Macraes where new wheels and tyres are fitted. New lightweight truck bodies have been installed giving a reduced empty truck weight, allowing them to optimise the payload.