8-16B, 10-20B and 10-20WB Extend-A-Mat<COMP-BREAK TAGNAME=cp850>©<COMP-RESUME> Screed Caterpillar

The problem is short waves in the surface.

The probable cause may be listed below.

• The mix temperature is inconsistent.

• A mix segregation is occurring in the mat.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

• The rolling operation is not correct.

• The base is not properly prepared.

• The grade reference is not correct.

• The grade control wand is bouncing on the reference.

• The sensitivity is set too high for the grade control.

• The grade control is not mounted correctly.

• The screed plates are not tight.

• The screed is riding on the lift cylinders.

• There is excessive play in the mechanical connection for the screed.

• The paver speed is too fast.

• The augers are overloaded.

• The head of material fluctuates.

The problem is long waves in the surface.

The probable cause may be listed below.

• The mix temperature is inconsistent.

• A mix segregation is occurring in the mat.

• The base is not properly prepared.

• The truck brakes are being held.

• The truck is bumping the machine.

• The machine is sitting for long periods of time between loads.

• The grade reference is not correct.

• The grade control is not mounted correctly.

• The asphalt feeders are not set properly.

• The hopper is emptying between loads.

• The screed is riding on the lift cylinders.

• The screed reaction time is not correct when you adjust the thickness control.

• There is excessive play in the mechanical connection for the screed.

• The augers are overloaded.

• The head of material fluctuates.

The problem is tearing of the mat across the entire mat.

The probable cause may be listed below.

• The mix temperature is cold.

• The mix temperature is inconsistent.

• There is moisture in the mix.

• A mix segregation is occurring in the mat.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

• The thickness of the mat is incorrect for the maximum size of the aggregate.

• The screed plates are cold.

• The screed plates are worn out or warped.

• The machine is moving too fast.

The problem is tearing of the mat in the middle.

The probable cause may be listed below.

• The asphalt mix is cold.

• The kicker screws are worn out.

• The kicker screws are mounted incorrectly.

• The screed plates are cold.

• The screed plates are worn out or warped.

• There is not enough lead crown in the screed.

The problem is tearing of the mat on the ends.

The probable cause may be listed below.

• The asphalt mix is cold.

• The screed extensions are installed incorrectly.

• The asphalt feeders are not set properly.

• The mold board on the strike off is too low.

• The screed plates are cold.

• The screed plates are worn out or warped.

• There is too much lead crown in the screed.

The problem is the texture of the mat that is not uniform.

The probable cause may be listed below.

• The asphalt mix is cold.

• The temperature of the asphalt mix is inconsistent.

• The asphalt mix is improperly designed.

• A mix segregation is occurring in the mat.

• The base is not properly prepared.

• The asphalt feeders are not set properly.

• The thickness of the mat is incorrect for the maximum size of the aggregate.

• The hopper is emptying between loads.

• The machine is sitting for long periods of time between loads.

• The vibrator is too slow.

• The screed extensions are improperly installed.

• The screed is riding on the lift cylinders.

• The machine is moving too fast.

• The augers are overloaded.

• The head of material fluctuates.

The problem is marks in the mat that are left by the screed.

The probable cause may be listed below.

• The truck brakes are being held.

• The truck is bumping the machine.

• There is excessive play in the mechanical connection for the screed.

The problem is a correction that is made, and the screed does not respond.

The probable cause may be listed below.

• The asphalt mix is cold.

• The temperature of the asphalt mix is inconsistent.

• The thickness of the mat is incorrect for the maximum size of the aggregate.

• The grade control is not mounted properly.

• The screed plates are not tight.

• The screed is riding on the lift cylinders.

• There is excessive play in the mechanical connection for the screed.

• The machine is moving too fast.

The problem is auger phantoms in the mat.

The probable cause may be listed below.

• A mix segregation is occurring in the mat.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

• The augers are overloaded.

• The augers are too low.

The problem is poor pre-compaction.

The probable cause may be listed below.

• The asphalt mix is cold.

• The base is not properly prepared.

• The thickness of the mat is incorrect for the maximum size of the aggregate.

• The vibrator is too slow.

• The screed is riding on the lift cylinders.

• The machine is moving too fast.

The problem is a poor longitudinal joint.

The probable cause may be listed below.

• The mix temperature is inconsistent.

• A mix segregation is occurring in the mat.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

• The rolling operation is not correct.

• The overlap of the joint is not correct.

• The grade reference is not correct.

• The grade control wand is bouncing on the reference.

• The sensitivity is set too high for the grade control.

• The grade control is not mounted correctly.

• The screed is riding on the lift cylinders.

• The screed reaction time is not correct when you adjust the thickness control.

• The augers are overloaded.

• The head of material fluctuates.

The problem is a poor transverse joint.

The probable cause may be listed below.

• The asphalt mix is cold.

• The rolling operation is not correct.

• The starting blocks for the screed are too short.

• The null for the screed is incorrect.

• The screed plates are not tight.

• The screed is riding on the lift cylinders.

• There is excessive play in the mechanical connection of the screed.

• The augers are overloaded.

The problem is cracking of the transverse joint.

The probable cause may be listed below.

• The temperature of the asphalt mix is inconsistent.

• There is moisture in the asphalt mix.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

• The rolling operation is not correct.

• The base is not properly prepared.

The problem is mat shoving under the roller.

The probable cause may be listed below.

• The temperature of the mat is inconsistent.

• There is moisture in the mix.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

• The rolling operation is not correct.

• The base is not properly prepared.

The problem is bleeding or flat spots in the mat.

The probable cause may be listed below.

• The temperature of the asphalt mix is inconsistent.

• There is moisture in the mix.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

The problem is marks from the roller on the mat.

The probable cause may be listed below.

• The temperature of the asphalt mix is inconsistent.

• The rolling operation is not correct.

• The base is not properly prepared.

The compaction of the asphalt mix is poor.

• The temperature of the asphalt mix is inconsistent.

• The asphalt mix is cold.

• There is moisture in the mix.

• The design of the asphalt mix is not correct.

• The design of the aggregate mix is not correct.

• The base is not properly prepared.