OPERATING FROM FIRE HYDRANT.

TM5--4210-224-14&P

2-20. OPERATING FROM DRAFT (Continued).

NOTE

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.

Shut down pump by turning engine throttle control knob (3, figure 2-1) clockwise to throttle engine down.

Turn heat exchanger control switch (20, figure 2-1) to the "OFF"position.

Turn pressure relief control knob (12, figure 2-1) clockwise until tight.

Close discharge valves and tank-to-pump valve control handle (13, figure 2-1). Remove and store hard

suction hose and strainer.

Disengage fire pump as described in paragraph 2-17.

2-21. OPERATING FROM FIRE HYDRANT.

NOTE

To operate from hydrant requires the use of a 2 inch hose and suitable couplings.

Engage fire pump as described in paragraph 2-15.

Close all drain and valve controls.

Remove cap from desired 3 inch suction inlet. Connect 2 inch hose with adapter to suction inlet and

hydrant.

Connect 2 inch hose to discharge outlet (26, figure 2-1) or use the two preconnected hoses located in the

small hose beds.

Using hydrant wrench, open hydrant supply slowly and observe pressure readings on master pressure gauge

(9, figure 2-1) and compound pressure gauge (10).

Check for proper hose lay and nozzle setting.

Turn heat exchanger control switch (20, figure 2-1) to the "ON" position.

Pull open desired discharge valve control(s).

2-52