70
IV.
OPERATING SYSTEMS
E. SPRAY SYSTEMS
FOAMER OPERATION–
To operate the foam marking system, locate the tog-
gle switch on the top of the hydrostatic lever (fig. 70-1). Push the top of the switch left
if foam is desired from the left foam drop. Push the top of the switch right if foam is
desired from the right foam drop. Return the switch to the center position if no foam is
desired.
System pressure is indicated by a pressure
gauge on the regulator which is mounted next to
the foam tank (fig. 70-2) To adjust the air pres-
sure in the foam tank, turn the knob on the regu-
lator clockwise for more pressure, and counterclockwise for less pres-
sure. To correctly decrease the pressure in the foam tank, you must first
open either the left or right foam valve for a moment to relieve system
pressure. Then adjust regulator accordingly.
See figure below for foam drop valve configurations.
RIGHT
FOAM
LEFT
FOAM
FIG. 70-1
FIG 70-3
• To drop foam at 60’, left-inner
handle should be vertical
• To drop foam at 90’, left-inner
handle should be horizontal
• To drop foam at 60’, right-inner
handle should be horizontal
• To drop foam at 90’, right-inner
handle should be vertical
• To drop foam at 90’, right-outer
handle should be vertical
Foam supply
from pressurized
foam tank
FR
O
N
T
• To drop foam at 90’, left-outer
handle should be horizontal
FIG. 4.38-2
