There are two belt conveyors, which transport the aggregate. These can be seen on each side of the photo in Figure 7‑30. These belts must be in good condition and not frayed enough to allow aggregate to spill over the sides onto the roadway.

The operator should start the conveyors and demonstrate the speed control. The speed should be variable to ensure that the supply of aggregate reaching the front hopper can be increased or decreased as needed.

There should not be an excessive amount of slack in the belts since this will cause sagging and loss of aggregate off the sides. If there is too much slack, the belts must be tightened.