TM 5-3820-256-10
5
Close the pump drain valve (8).
6
Move pump operating valve knob (1, figure 2-20) in the direction the water should flow. Lift up
the lower sleeve of the knob with two fingers, move knob to right or left; then release sleeve.
The indicator light (2) should come on.
7
Continue pumping until tank water level gage (1, figure 2-19) reads "F" (FULL); then shift
operating valve knob to center, OFF, position.
WARNING
Overfilling will cause water to shoot out the rear vent valve and boom-stand vent and may injure
personnel or cause damage to the tank or other equipment.
8
Close the rear vent valve (7, figure 2-37).
9
Open the pump drain valve (8).
10
If front (6) or rear (5) valve was used to fill tank, close the valve first; then uncouple hoses;
replace in storage chamber and secure.
11
Replace fill pipe cap (if removed).
12
Disengage hydraulic system/PTO Lever (2, figure 2-23) on the control panel in the truck cab and
kill the engine.
(b) Pump Water Out of Tank. (See Figure 2-38).
1
Couple the male end (1) of one hose to the pump outlet; place the female end (2) in the discharge
area.
2
Couple the male end (3) of another hose to the other pump outlet and couple the female end (4)
to either the: fill pipe (5); rear valve (6); or front valve (7). Be sure to open the valve if using
either front or rear valve. If using the fill pipe, first remove the cap.
CAUTION
Never operate the water pump against a closed valve.
NOTE
An automatic bypass backplate, which will internally bypass the pump if you try to operate with a closed
valve, is built into the pump. This safety feature should not be used longer than 5 to 10 minutes.
3
Open the rear vent valve (8).
2-74
