SPRING 3619760 - Caterpillar

Warm-Up
At start-up, operate the machine in fourth gear or in a lower gear until the oil is at 38°C (100°F). Allowing the oil to warm-up gradually permits bearing components to maintain optimum operating positions. High speeds during a cold start-up will cause the temperatures of the rotating components to be very different from the temperatures of the stationary components. High temperature differences within the bearing may result in less durability of the bearing component.Break-In
The running surfaces of gears and of bearings are conditioned during break-in. Break-in brings bearing components to optimum operating positions.Break-in
For 15 to 20 minutes, load the machine with 60% to 75% of the capacity.
Limit the top speed to fourth gear for approximately 15 to 20 minutes. Placing significant load on bearing components at a lower speed creates a favorable condition of contact between the mating surfaces.