2-14. AERIAL LADDER SET-UP - Continued
f. Operating Aerial Discharge.
Refer to paragraph 2-13 for appropriate pump setup instructions (pumping from draft, pumping
from hydrant or in relay, pumping from water tank).
With the engine at idle speed, select PUMP mode with ELECTRIC PUMP SHIFT switch on cab
Depress the brake pedal and shift the truck transmission into D (drive).
Do not put the truck transmission selector lever into R (reverse)
position. Damage to the water pump may result.
If the green OK TO PUMP light does not illuminate, or a grinding
noise occurs, move the transmission selector lever back to N
(neutral) position; pause for several seconds and move the
selector to D (drive) position.
When pump is engaged, truck speedometer should indicate approximately 18 MPH.
Open AERIAL DISCHARGE valve on pump operator's panel and set AERIAL DISCHARGE
OPEN/CLOSED switch on aerial platform to OPEN.
Turn the RELIEF VALVE lever to the ON position and adjust knob to obtain desired discharge
Monitor engine coolant temperature. if the temperature ex-
ceeds 21 0 deg. F (99 deg. C), or the alarm sounds, open the
ENGINE COOLER control valve gradually until the tempera-
ture stabilizies at 200 deg. F (93 deg. C). Failure to heed this
caution my cause engine damage.
Do not attempt to pump more water than is available from
hydrant or relaying pumper. Always make sure compound-
gauge reading stays above zero. Some fire departments
operate at a minimum suction pressure of 10 psi (69 kPa) when
pumping from hydrant or relay to prevent a soft suction hose