RADIATOR & FAN GP 1804403 - Caterpillar

Illustration 1 g00804485
The figure shows a typical rolling pattern. The compactor begins the pattern on material that has been previously compacted. The compactor begins at the right edge or the left edge of mat (1). The operator turns on the vibratory system when rolling speed has been reached, if equipped. The compactor should be operated in a straight line at a constant speed. The machine should stop at a predetermined distance from paver (2). The application and the type of mix affects the distance between the machines. The distance between the machines is usually 6 m (20 ft). The operator completes the first cycle by repeating the first pass in reverse. When the machine approaches the starting point, the operator should gradually turn the machine to a new starting point (3). The new starting point should provide a 152.4 mm (6 inch) overlap from the uncompacted mat to the compacted mat. The third pass has an identical form to the first pass. The third pass will be longer than the first pass. The pass will be longer because the paver has moved forward by this time. The sequence continues until the full width of the lane is compacted. The reverse pass of the first set of passes is the starting point for the next set of passes. If marks occur, the reversal should be completed differently. Marks in the mat occur most often because of a thick mat, a soft mix, or round aggregate in the mix.In order to prevent a mark, the operator should slightly turn the machine as the machine comes to a stop. Turning the machine will allow the line of the reverse pass to be easily rolled.The rolling method that is chosen is affected by the design parameters of the project.The procedure for compacting a longitudinal joint involves rolling along the joint with all the wheel surface on the hot side. The wheels force the hot asphalt into the joint. During the second pass, overlap the cold mat about 152.4 mm (6 inch).
Illustration 2 g00736768
Compacting unconfined edges is done differently than a longitudinal joint. Make the first pass about 152.4 mm (6 inch) away from the edge. The first pass adds strength to the mat. During the second pass, the asphalt that was compacted supports the weight of the tires. The edge is compacted but the edge is not pushed out.Edges that are confined require a similar rolling pattern to the method for the longitudinal joint. Make the first pass along the joint. On thick lifts, some of the material that is hot can be forced onto the cold side. This material cannot be adequately compacted and much manual work must be done in order to clean up the process. An alternate procedure involves rolling the first pass with most of the tires on the cold side and a 152.4 mm (6 inch) overlap on the hot side. The position of the tires will close the joint before compacting the hot side.
Illustration 3 g00804490
Compactors are constantly changing