Table 2-1. Street Side Operator's Controls and Indicators
250 GPM Mini-Pumper Firefighting Truck (Continued)
(Refer to Figure 2-1)
Control or Indicator
Water Tank Level Gauge.
he Water Tank Level Gauge is used to measure the amount of water in
the water tank.
The gauge measures in increment readings of FULL, 3/4, 1/2, 1/4, and
The level is indicated by reading the level next to the highest illuminated
Heat Exchanger Control
The Heat Exchanger Control Switch
operates the heat exchanger valve which supplies coolant water from
fire pump to engine and transmission.
To operate, turn switch lever to the left (counterclockwise).
Turn the switch to the right (clockwise) to close.
Water Tank Drain Knob.
The Water Tank Drain Knob is used to drain the 250 gallon water tank.
Pull the knob all the way out to drain the water tank. Push the knob in to
close the drain.