Table 2-1. Street Side Operator's Controls and Indicators - continued

TM 5-4210-224-14&P

Table 2-1. Street Side Operator's Controls and Indicators

250 GPM Mini-Pumper Firefighting Truck (Continued)

(Refer to Figure 2-1)

Key

Control or Indicator

Function

22.

Primer Control Knob.

The Primer Control Knob is used to electrically activate the automatic

primer control valve and primer pump which allows air to be drawn from

the pump and replaced with water.

Increase engine speed, pull out primer control knob and hold out until

pressure on master pump pressure gauge appears. After pressure is

achieved, release knob and increase engine RPM to desired operating

pressure.

23. 2 1/2 Inch Discharge Outlet

The 2 1/2 Inch Discharge Outlet is

Drain Knob.

used to drain the 21 inch discharge outlet. To operate, pull the knob all

the way out to drain the outlet. Push the knob in to close the drain.

24. Booster Hose Outlet

The Booster Hose Outlet Control

Control Handle.

Handle controls the flow of water from the pump to the rear hose reel.

To operate the valve, pull the handle to open the valve. This allows water to flow to the hose reel.

To stop the flow of water to the hose reel, push the handle all the way in to close the valve.

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