Graco 258699, 257500 important safety instructions Applying Material

Models: 257500 258699

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Troubleshooting

Applying Material

Problem

Cause

Solution

 

 

 

 

 

 

Ragged line edges when extruding

Dirty screed box

CAREFULLY clean box. Discharge

 

 

opening and die plate runners need

 

 

to be free of debris.

 

 

 

 

Cold material temperatures

Heat material as required.

 

 

 

 

Marking speed too fast

Slow Thermolazerspeed.

 

Material thickness too think

Slow Thermolazerspeed and keep

 

 

screed box filled.

 

 

 

Rough material surface when extrud-

Overheated material

Reduce heat.

ing

 

 

Moisture on road surface

Allow road surface moisture to dry.

 

 

 

 

 

Rough road surface

Smooth road surface.

 

 

 

 

Screed box low on material

Add material to screed box.

 

 

 

EXAMPLES:

 

 

Correct line application will produce a full straight line with sharp edges; correct color, thickness and width; a firm bond to the surface; and have uniform reflectivity.

ti14507a

Insufficient adhesion (material bulges

Material temperature too low

Raise material temperature

at beginning of line)

Thermolazerspeed too fast

Decrease speed of

 

 

Debris on road

 

Thermolazer

 

 

 

 

• Surface temperature too cold

• Clear debris from road

 

 

 

ti14508a

 

 

• Wait for temperature of surface to

 

 

 

raise

 

 

 

 

Rough and bumpy line

Debris on surface

• Clear debris from surface

 

Crust from overheated material

Lower material temperature

 

Debris caught in die

• Clean debris from die

ti14509a

Material not covering road high

• Adjust screed box line thickness

 

spot

 

 

 

 

 

 

Gas bubbles in line

Moisture or solvent on surface

• Remove solvent from surface

 

Material is overheated

• Lower temperature of material

ti14510a

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Graco 258699, 257500 important safety instructions Applying Material