Pierce HUSKY 3 - Page 48

MAINTENANCE
4-10 / Husky 3 Foam System
© 2022 Pierce Manufacturing Inc. All Rights Reserved.
Question Reason for Question Test Procedure
B. Is the green light on the control
module ON?
A green light indicates that
the electrical portion of the
system is functioning.
Visual inspection.
Question Reason for Question Test Procedure
C. Does the foam pump engage? To isolate the problem
from between electrical
and mechanical failures.
NOTE: You must be flowing water for
the foam pump to operate.
Turn the foam percent up and listen for the
foam pump to engage. Press and hold PRIME
button with foam pump discharge drain open. If
foam pulsates out of drain valve, foam pump is
stroking (pumping).
Question Reason for Question Test Procedure
D. Tank fill option - look to see if
the selector valve is in the
TANK FILL mode.
If the tank fill valve is
open, all of the foam
concentrate will circulate
between the foam pump
and the foam tank, with
little or none being
injected.
Remove the tube from the outlet of the tank fill
valve. Operate the foam system. If foam
concentrate is discharged, the tank fill valve is
open.
Go to Step J.
No
Yes
Go to Step M.
No
Yes
Go to Step P.
Yes
No