Training

Engine 3 Operations




2-11. FIREFIGHTING OPERATIONS.

a. CFR Mode.

NOTE

CFR operation may be carried out with the truck stationary or in pump-and-roll mode. Pumpand-

roll mode may be selected while the truck is in motion.

(1) Select the transmission shift lever (1) to N (neutral) for stationary operation, or R, 1, 2, or 2-3 for pumpand-

roll operation.

CAUTION

To avoid water hammer, adjust the vehicle speed so that the engine is operating at or below 1200

rpm before you engage the pump.

(2) Set the mode switch (2) to CFR.

(3) Set the water tank valve switch (3) to OPEN.

(4) Set the pump switch (4) to ON.

(5) Be sure that pressure is registered on the pump pressure gage (5) before you engage the governor.

(6) Set the governor switch (6) to ON.

NOTE

The CFR, TANK, PUMP and GOVERNOR must be selected in the above order to ensure a smooth

start-up of the firefighting system.

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TM 5-4210-220-12

2-11. FIREFIGHTING OPERATIONS. - Continued

NOTE

If foam is required, carry out steps 7, 8 and 9.

(7) Turn the foam metering valve (7) to required foam percentage.

(8) Set the water educator switch (8) to open.

(9) Set the foam valve switch (9) to open.

WARNING

Engine overspeeding and difficult vehicle control may be experienced in pump-and-roll mode if

the water tank is completely emptied. Be prepared to shut off the automatic governor when the

tank level indicator (10) shows 1/4 tank and refill required.

NOTE

Use the brake pedal to control the vehicle speed in pump-and-roll mode.

2-50

TM 5-4210-220-12

2-11. FIREFIGHTING OPERATIONS-Continued

NOTE

Operate the roof and/or bumper turret as required.

(10) Remove the turret handle lock pin (11).

(11) Open the roof turret valve (12) as required.

(12) Using the turret handle (13), aim the water or foam discharge flow toward the fire zone.

(13) Adjust the discharge pattern as required using lever (14).

(14) Open the bumper turret valve (15) if required.

(15) Using the turret handle (16) aim the water or foam discharge flow toward the fire zone

(16) Adjust the discharge pattern as required using lever (17).

(17) Shut down the firefighting system when the fire is extinguished or the water supply is used up. Make sure

the bumper turret valve (15) is fully closed and the roof turret valve (12) is slightly cracked Place roof turret handle (12)

in storage position and reinstall the lock pin (11).

(18) If foam has been used, switch the foam tank and water educator valve switches to CLOSED and set the

foam proportioning valve to 0.

(19) Set fire system control switches to OFF or CLOSED in the following order, GOVERNOR, PUMP, TANK.

Change 2 2-51

TM 5-4210-220-12

2-11. FIREFIGHTING OPERATIONS-Continued

b. Structural Firefighting

(1) Stop the vehicle and idle the engine. Engage the parking brakes by pushing in button (1) and set the

transmission shift lever (2) to N (neutral).

(2) Set the mode switch (3) to STRUCT.

(3) Play out the connect suction hoses to water supply insuring that connections are tight and all drains and

discharge ports are closed.

NOTE

• When water must be supplied via the water tank, connect hoses between the source,

(hydrant, pump, tanker) and the rear auto fill valve. Set the rear auto tank fill valve switch to

ON (see para. 2-5). Maintain switch OFF when not in use.

• When water must be supplied via drafting, connect hoses between water source (open pond,

holding tank) and suction ports on vehicle. Be sure that all internal and external strainers are

in place.

(4) If use of the tank supply is required, set the tank valve switch (4) to OPEN.

NOTE

Maintain the switch CLOSED when water is provided via the suction manifold.

(5) Play out and attach hoses to the discharge ports as required.

Change 3 2-52

TM 5-4210-220-12

2-11. FIREFIGHTING OPERATIONS-Continued

(6) Set the pump switch (5) to ON.

(7) When ready to begin firefighting, increase the pump pressure by manually adjusting the throttle regulator

(6) in a clockwise direction.

NOTE

Maintain the pump discharge pressure gage (7) at approximately 150 psi (1030 kPa).

(8) Open applicable discharge port(s) and regulate the hose discharge pressure(s) using levers (8).

NOTE

Monitor engine coolant temperature. If the temperature exceeds 210 deg. F (99 deg. C), or the

alarm sounds, open COOLANT control valve (9) gradually until temperature stabilizes at 200 deg.

F (93 deg. C).

NOTE

If foam is required, carry out steps 9 thru 12.

(9) Set the water educator switch (10) to OPEN.

Change 3 2-53

TM 5-4210-220-12

2-11. FIREFIGHTING OPERATIONS-Continued

(10) Turn the foam metering valve (12) to required foam percentage.

(11) Set the foam valve switch (13) to OPEN.

(12) While discharging foam, observe the water and foam tank level gages (14 and 15). Reduce the engine

speed to idle before or immediately after the water tank is emptied and shut the pump OFF.

CAUTION

If the engine water temperature exceeds 210 deg. F (100 deg C), open COOLER valve (9) until

temperature stabilizes.

NOTE

If the foam tank is emptied, firefighting may be continued using water only. Set the foam valve

and water eductor switches to CLOSED and set the foam proportioning valve to 0.

CAUTION

When backing off the throttle bring the, engine to an idle, then back the throttle control off an

additional three turns. This will prevent the throttle control from interfering with the governor

control when in the CFR mode. Failure to adhere to this procedure will cause excessive

hydraulic hammering resulting in catastrophic damage to the water delivery system.

(13) When the fire is extinguished or the water supply is emptied, throttle the engine back to idle and close all

discharge valves.

(14) Set the pump switch (5) to OFF.

NOTE

If the pump cannot be disengaged with the switch, open the manual pump shutdown valve (16).

(15) If required, set the water tank valve switch (4) to OFF

(16) If foam has been used, set the foam valve (13) and water eductor switches (10) to CLOSED and turn the

foam metering valve (12) to 0.

(17) If the hose reel has been used, open the hose nozzle and blow air through the hose to remove residual

water. Rewind the hose (see para. 2-5).

(18) Disconnect and store other hoses as applicable and cap all suction and discharge ports.

Change 4 2-54

TM 5-4210-220-12

2-11. FIREFIGHTING OPERATIONS - Continued

c. Operating 110-Vac Auxiliary Equipment

CAUTION

To prevent damage to the 110-Vac inverter, the inverter must be energized and deenergized and

loads connected and disconnected in the sequence detailed in the following steps

(1) Inverter may be operated with the fire pump operating, in this case carry out steps 3 thru 5. If the fire

pump is not being operated, carry out, steps 2 thru 5.

(2) Set mode switch (1) to STRUCT in cab Adjust hand throttle (2) on structural control panel until engine is

running at a steady 1300 rpm.

(3) Press the ON pushbutton (3) on the control box in the cab, the inverter housing, or the control box located

on the structural control panel.

(4) Be sure the inverter (5) voltmeter beside the control switch indicates 110 Vac, then connect the auxiliary

equipment to any of the 110-Vac receptacles.

(5) While the auxiliary equipment is operating, monitor and maintain the inverter voltage at 110 Vac. Adjust

the engine throttle position, if necessary, to maintain this voltage.

CAUTION

If the fire pump is required to be shut off during 110-Vac system operation, unplug all loads and

switch off inverter, shut down pump as detailed in para. 2-11 b preceding, and repeat steps 2 thru

5.

(6) When the use of 110-Vac equipment is no longer required, switch off and unplug the equipment.

(7) Hold OFF pushbutton (4) on any of the 110-Vac controls until voltage indicator reduces to zero. Reduce

engine speed to idle by turning throttle (2) fully anticlockwise (unless fire pump is operating).





Monday, March 1, 2010
Air Bag Training

SAFETY CONSIDERATIONS
The following are safety guidelines developed through use of the Maxi-Force Air Bag System:
- Only members involved with the air bag operations should " be in the work area.
- All members in work area shall wear proper protective clothing.
- One member shall be assigned as the safety observer.
- People involved in air bag operations should be alert to unsafe weight shifting.
- Members working in a squatting position should keep their body weight on the balls of their
feet for a quick escape.
- Never work under a load supported only by air bags. Loads must be securely cribbed prior
to members working under the load.
- Never inflate air bags against sharp objects.
- Never inflate air bags against objects hotter than 220 degree F.
- Place bags in a position to maximize surface area making contact with the object.
Always stabilize the object to be lifted. Remember, for every action there is an equal reaction.
Determine which direction this reaction may occur and stabilize the object to prevent unsafe
movement.
When stabilizing a vehicle, chock a minimum of one front wheel and one rear wheel on each
side.
Posted by Elwood Fire Dept. at 9:15 AM