HOSE ASSEM. 7I3222 - Caterpillar

Parallel Joints
To make a parallel joint, a matching joint must be made between the two mats. It is preferable to match the mats before the first mat has cooled.
Illustration 8 g00803338To make a parallel joint, do not allow the compactor to roll closer than 150 to 300 mm (6 to 12 inches) to the edge of first mat (3) closest to joint surfaces (2). Roll the parallel joint when second mat (1) is rolled.To make the parallel joint, the edge of the screed should overlap the first mat 25 to 50 mm (1 to 2 inches). The edge of the screed should be flush with the first mat.If the first mat has been rolled, raise the screed in order to allow enough material for compaction. In order to match the second mat to the first mat, the second mat must be thick enough for the compaction of the second mat. Roll the parallel joint as soon as possible.The parallel joint must be bonded to a cooled mat. When you lay the second mat, you must allow enough material to compact in order to match the cool mat thickness. A compactor should roll the joint immediately after the paver. Transverse Joints
The quality of a transverse joint depends on the preparation that was made for the joint surface at the end of the first mat. The edge of the first mat should be vertical so a good bond can be made between the joint surfaces.Note: When forming a joint surface before the first mat has had time to cool, do not compact the last 1.8 m (6 ft) of the first mat. When you are ready to make the joint surface, raise the screed and move the paver backward. Stop the paver when the edge of the first mat is 75 mm (3 inch) to 100 mm (4 inch)in front of the screed. Lower the screed onto the slats that are thick enough for the compaction of the mat.With the screed on the first mat, adjust the thickness controls if the thickness controls have been changed. Fill the auger conveyor with asphalt. Start paving.When the thickness controls are set, enough material must be allowed through in order to compact the second mat. Adjust the thickness controls in order to achieve the desired mat thickness.Paving Around Manholes
The procedure for laying asphalt around a manhole depends on the course that is paved.The surface of the mat will usually be higher than the top of the manhole after you lay the top course.When you are laying two layers of asphalt, and you are laying the bottom course, the screed will not pass over the manhole. The screed must be raised in order to allow the screed to pass over the manhole. Return the screed to the proper height after passing over the manhole.To mark the position of the manhole, place a mark alongside the mat. The mark will help the operator judge the position of the manhole while the manhole is under the paver.The