Section II. OPERATING PROCEDURES
Priming Water Pump.
Start the engine. Refer to Section 1.
Engage the service brake.
Refer to section 2 driver's operating controls section 2 pump shift control.
Set emergency brake.
Leave cab and proceed to pump instrument panel at left side of truck.
Close all drains, and discharge lines.
When priming from open water, remove suction cap from left side or rear of truck and attach one end of the
hose to the pump suction arm. Place the suction strainer on the other end of the hose and place in water.
Connection must be air tight.
Before operating from a suction lift, see that the strainer at the lower end of the suction hose is at least two
feet below the water surface to avoid drawing air. The strainer should not rest on the bottom to prevent
pumping sand and foreign matter.
Excessive sand and foreign matter in water pump will eventually decrease pump efficiency.
Prime the pump by activating the primer control (5, Fig. 3) at this time a vacuum reading will show on
vacuum gauge, the pump is primed when water is expelled to the ground under the pump and a pressure
reading shows on pressure gauge. When the pump is primed, release the primer control.
10. If priming from the water tank, open the tank to pump valve (7, Fig. 3). When priming from the water tank,
the primer control need not be used.
11. When priming from a hydrant through either the suction line or the auxiliary suction line, the primer control
need not be used.