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TM 5-4210-230-14&P-1
J.
Suction manifold valve. (31, Fig. 3) used to control 2 1/2" suction manifold (30, Fig. 3).
K.
Pump primer. (32, Fig. 3) used to control primer to draft water.
L.
#1 discharge drain. (33, Fig. 3) used to drain #1 discharge manifold.
M. Engine cooler. (34, Fig. 3) used to supply water to engine heat exchanger, CCW to open.
N.
Proportioner control. (36, Fig. 3) used to meter the amount of foam to enter water supply.
O. Pump flush valve. (35, Fig. 3) used to flush foam from pump.
P.
Foam to proportioner valve. (37, Fig. 3) used to control foam supply to proportioner.
Q. Pump drain. (38, Fig. 3) used to drain water from pump.
3.
Gauges and Meters
A.
Oil pressure gauge. The oil pressure gauge (18, Fig. 3), located on the left side operator's pump control panel, is
a dial-type gauge graduated from 0 to 80 pounds per square inch that indicates the engine oil pressure.
B.
Tachometer. The tachometer (15, Fig. 3), located on the left side operator's pump control panel, is a dial type
gauge graduated from 0 to 6. Each graduation indicates 1000 revolutions per minute. The tachometer
measures the revolutions per minute of the fire truck engine.
C.
Water temperature gauge. The water temperature gauge (19, Fig. 3), located on the left side operator's pump
control panel, is a dial-type graduated from 600F to 2400F that indicates the engine water temperature.
D.
Master pump discharge pressure gauge. The pump discharge pressure gauge (1, Fig. 3), located on the left side
operator's pump control panel, is a dial-type gauge graduated from 0 to 600 pounds per square inch of pressure
and 0 to 30 inches of mercury. It indicates the maximum discharge pump pressure.
2-2
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