TM 5-3895-373-10
2.2.3
Crown Adjustment. The crown adjustment
produces the desired contour of the finished paving
material. Crown adjustment is accomplished by a
sprocket wheel and chain mechanism located on the top
center of the screed. A crown adjustment wrench is
provided on the screed for this adjustment. Turning the
wrench up produces a positive crown. Turning the
wrench down produces a negative crown. A pointer
mounts on the screed to show the amount of crown
placed on the screed. This pointer is for comparison
only and does not provide an actual crown value. When
the screed is flat (no crown), it is referred to as being in a
null condition.
2.2.4
Screed Thickness Controls. The thickness
controls control the thickness of the finished paving
material by controlling the angle of attack on the screed.
Turning the hand crank clockwise increases thickness.
Turning the hand crank counterclockwise decreases
thickness. An indicator for the thickness control is
provided on the screed. The thickness control indicator
is for comparison only and does not provide an actual
mat thickness value.
2.2.5
Endqate Hand Levers. The endgate hand levers
raise and lower the endgates. The hand levers must
unlock before they will operate. To unlock a hand lever,
grasp it with one hand and squeeze. The endgates
normally ride on the surface that is being paved,
providing the finished edge.
2-8
