DISENGAGING FIRE PUMP.

TM5--4210-224-14&P

2-16. PRIMING FIR E PUMP (Continued).

CAUTION

Do not operate priming pump motor continuously for more than 30 seconds. If priming pump

does not prime fire pump and discharge a solid stream of water in 30 seconds, stop both priming

pump and fire pump and check for leaks. Allow at least a two-minute cool-off period before

operating the primer again.

At street side operator control panel, pull out the primer valve control knob (22, figure 2-1) to start priming.

Operate priming pump until it emits a solid stream of water through its discharge pipe. When pump is

primed, release the primer valve control knob (22).

2-17. DISENGAGING FIRE PUMP.

Leave parking brake (10, figure 2-2) and micro-lock brake control (24, figure 2-3) engaged. Wait until

tachometer (19, figure 2-3) reading is between 500-700 rpm. before disengaging fire pump. Damage to

pump may result if engine speed is too rapid.

CAUTION

Wait until tachometer (19, figure 2-3 ) reading is

between 500-700 rpm. Before disengaging fire pump.

Damage to pump may result if engine speed is too

rapid.

Depress clutch pedal and push pump/PTO control knob (25, figure 2-3) in to disengage fire pump.

Pump/PTO indicator light (26) will de-activate.

Depress brake pedal (8, figure 2-2). Move manual transmission gear selector (4) to desired drive position.

Release parking brake (10, figure 2-2) and micro-lock brake control (24, figure 2-3).

2-48