surfaces of the frame members and cross-members. Use wire brushes and cleaning solvent to remove all foreign matter
from the frame corners, recesses, and welds. Remove all rust and corrosion with wire brushes and sanders. Use
scrapers and chisels to remove the road tar and paving materials from the edges and corners of the frame members.
Clean all welds with wire brushes until bare metal is visible. Blow off all dust and dirt with compressed air.
b. Inspection. Check all welds for breaks, cracks, and splitting. Clean the welds until bare metal is visible before
checking for damage. Inspect the welding seams for poor weld penetration, peeling beads, and corrosion between the
weld beads and frame members. Inspect the cross-members for twisting warpage, breaks, and cracks. Check the outer
surfaces for excessive corrosion and etching. Inspect the steel sheets for cracks, breaks, and warpage. Pound out minor
dents from the steel sheet surface.
c. Repair. All breaks and cracks in the frame members and crossmembers must be reinforced and electrically
welded. Clean the metal thoroughly around the crack or break. Check the length of the crack and drill a small hole about
one-half to 1 inch beyond the visible end of the crack. This hole will prevent the crack from running when heat is applied.
Use an acetylene torch or a blowtorch to preheat the metal around the crack to about 200 F. Weld the crack by the
arcwelding method, using reverse polarity and a mild steel shielded arc electrode. Allow the weld to cool slowly. Then
clean the weld and spatter. Check the weld bead for proper penetration. Reinforce the weld and frame member by
welding a reinforcing plate over the crack.
Section XI. ROLLS
217. General
The rolls are designed not only to compact the paving materials densely for long wear, but to obtain the smoothest
possible finished surface. Outer surfaces of the steering and compression rolls are machined to assure a smooth and
even paving job. The sprinkler tank and sprinkler system direct a flow of water over both rolls to prevent tacky paving
materials from sticking to both rolls. The variable weight of the road roller is controlled by the water ballast in the steering
and compression rolls. With both rolls filled with water ballast, the total weight of the road roller is increased by 5, 700 lb.
The steering roll is of split-section design to eliminate the gouging of paving materials when turning and reduce strain on
the kingpin and other steering parts.
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