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TM 5-4210-230-14&P-1
CHAPTER 2. CONTROLS AND INSTRUMENTS
Section 1
Pump and Accessory Controls
1.
General
This section identifies and describes the function of controls and indicators used in operating this fire fighting
equipment.
Note
All control valves are, pull to open and push close, and are located at the operator's pump control panel.
2.
Control Valves
A.
#1 crosslay. (20, Fig. 3) used to control #1 - 1 1/2" crosslay discharge.
B.
#2 crosslay. (21, Fig. 3) used to control #2 - 1 1/2" crosslay discharge.
C.
Pressure relief valve. (22, Fig. 3) used to control pump pressure by turning handle CW to increase CCW to
decrease. The relief valve is used in conjunction with engine throttle control (16, Fig. 3).
D.
Water to proportioner valve. (23, Fig. 3) used in conjunction with the foam to proportioner (37, Fig. 3) to control
water supply to foam proportioner.
E.
Tank to pump valve. (24, Fig. 3) used to open or close tank to pump line.
F.
Tank fill valve. (25, Fig. 3) use to fill 300 gallon tank.
G. Hose reel valve. (26, Fig. 3) used to control water discharge to hose reel.
H.
Auxiliary suction valve. (27, Fig. 3) used to control auxiliary suction at rear of truck.
I.
#1 discharge valve. (28, Fig. 3) used to control 2 1/2" #1 discharge (29, Fig. 3).
2-1
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