When a machine comes to a standstill, the root cause is not always where maintenance teams first look. While engines often receive the most attention, the performance of transmissions, hydraulic systems, cooling circuits and grease-lubricated components can have just as much influence on equipment availability, maintenance costs and overall operational efficiency. A modern mining machine is a collection of interconnected systems working together under demanding conditions. Haul trucks, excavators, loaders and support equipment rely on a combination of engine oils, transmission fluids, hydraulic oils, coolants and greases to operate reliably day after day.