SEAL-RING 2W6768 - Caterpillar

Illustration 1 g00564510
The head of material is the amount of the material that is placed ahead of the screed. The mass of material ahead of the screed is putting pressure in four directions. The factors that control the head of material are the proper adjustment of the automatic feeder switches in conjunction with the depth, width, and paving speed. The head of material should remain constant in order to obtain a smooth surface. If the head of material decreases, the pressure at the front of the screed decreases. If the pressure at the front of the screed decreases, the screed will drop. If the head of material increases, the pressure at the front of the screed will increase. If the pressure at the front of the screed increases, the screed will rise.