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OPERATING FROM FIRE HYDRANT - continued
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TM-5-4210-224-14-P 250 6PM Mini-Pumper Firefighting Truck Model No.:CM-KFT-3 Manual
Next
POST OPERATIONAL PROCEDURES.
TM5--4210-224-14&P
2-21. OPERATING FROM FIRE HYDRANT (Continued).
m.
Turn pressure relief control knob (12, figure 2-1) clockwise until tight.
n.
Close discharge valve control(s) o.  Using hydrant wrench, close hydrant supply and disconnect hose.
Replace hydrant and suction inlet caps.
p.
Disengage fire pump as described in paragraph 2-17.
2-22. OPERATION OF BOOSTER HOSE REEL.
a.
Engage fire pump as described in paragraph 2-15.
b.
Open tank-to-pump valve control handle (13, figure 2-1) to allow water to flow from tank-to-pump.
c.
Release hand brake and unwind hose from the hose reel.
d.
Turn heat exchanger control switch (20, figure 2-1) to the "ON" position.
e.
Open booster hose outlet control handle (24, figure 2-1).
f.
Turn engine throttle control knob (3, figure 2-1) counterclockwise to accelerate engine until master pressure
gauge (9) indicates desired discharge pressure
g.
Turn pressure relief control knob (12, figure 2-1) counterclockwise to decrease pump discharge operating
pressure, clockwise to increase pump operating pressure.
CAUTION
Fire pump will heat up rapidly if pump is operated with all discharge valves closed. Prolonged
operation will cause damage from overheating.
NOTE
Periodically check engine temperature gauge (1, figure 2-1) for normal engine-operating
temperature range of 100F (55.5C) to 250F (138.8C).
If a shutdown is required for changing hoses or any other reason, slow the engine to decrease
water pressure to 30 psi and close the discharge valves. Open tank-to pump valve control
handle (13, figure 2-1) and tank fill control handle (14) to recirculate the water.
2-54

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