2-20. OPERATION OF REMOTE TURRET.
a. Activate the system by using the remote turret pressure activator switch (9, figure 2-2).
b. Activate turret solenoids by using the twin agent solenoid activator switch (7, figure 2-2).
c. The regulator pressure gauge (6, figure 2-2) indicates regulated pressure in the dry chemical and AFFF tanks.
d. Remove control handle retaining pin (5, figure 2-2) and pull twin agent control handle (4) down. Nozzle
spray pattern is controlled by the AFFF turret nozzle shaper (12, figure 2-2). Placing the control fully forward
emits a dispersed pattern, while placing the control all the way back emits a straight stream.
e. To operate the turret, select the agent required by using the AFFF/Dry Chemical selector switch (10, figure
2-2) and press the twin agent activating button (2) on the end of the twin agent control handle (4). The dis-
charge of the selected agent will continue as long as the twin agent activating button (2) is pushed in. Releas-
ing the switch will stop the discharge agent. To control the shape of the AFFF agent discharge, place shaper
control handle (12, figure 2-2) fully forward for a dispersed pattern or all the way back for a straight flow.
f. If an agent change is required, all turret discharge should be halted before the AFFF/Dry Chemical selector
switch (10) is used.
2-21. OPERATION OF REAR HANDLINE.
a. Activate the system by using the twin agent pressure activator switch (2, figure 2-1) or manual twin agent
pressure activator handline (3).
b. Release hand brake and unwind hose from the hose reel.
c. The regulator pressure gauge (4, figure 2-1) and test gauges (6) indicate the regulated pressure in the dry
chemical and AFFF tanks.
d. Open either or both dual agent handline control handles (22, figure 2-1).
2-22. POST OPERATIONAL PROCEDURES.
a. Immediately upon return from a firefighting mission, service and check the truck.
b. Determine if any physical damage has occurred to the truck or components/accessories during the mission.
2-23. SYSTEM SHUT-DOWN AFTER OPERATION PROCEDURES.
If all cylinder pressure has been spent it is
necessary to manually close the turret op-
erating valves using the manual override
control levers (8, figure 2-2).
a. CLOSE the AFFF emergency shut-off valve (9, figure 2-1) and the dry chemical emergency shut-off valve
b. OPEN the purge valves (16 and 17, figure 2-1).
c. OPEN dual agent handline control valves (22, figure 2-1) until only nitrogen discharges.