TM 5-3820-256-10
2-15
Water Pump System.
a. Assembly and Preparation for Use.
(1)
If hoses and/or fittings are wrapped, remove protective wrappings.
(2)
Inspect the female ends; be sure rubber gaskets are installed.
b. Initial Adjustments, Daily Checks, and Self Test.
(1)
Check water hoses and couplings to make sure they fit together properly with no damage or leaks.
(2)
Make sure there is no debris or corrosion on the suction strainer.
c. Operating Procedure.
NOTE
Prior to turning on the water pump, start the truck engine and engage the hydraulic system/PTO Lever
located on the control panel in the truck cab. Set the engine rpm at 1000. (To reduce water flow, reduce
engine rpm.)
CAUTION
Exceeding 1000 engine rpm's may cause water pump malfunction or damage.
(1)
Remove the hoses from the heat manifold (5, figure 2-34) storage location by unhooking the cable and
carefully pulling out one hose at a time.
NOTE
There are four (4) identical (2" x 20') hoses for use as suction and discharge lines. Each hose has a
male coupling on one end and a female coupling on the other. Each hose may be used separately or, to
increase the length of one or both lines, may be assembled by snapping together the mating quick-
couplers. See Figure 2-35.
(2)
Open the storage compartment (7, figure 1-5) where the water pump is housed.
(3)
Close the water pump drain valve.
NOTE
The self-priming pump is reversible, operating with equal efficiency in either direction. Water flow
direction is controlled by moving a 3-position valve to the desired position: ON/LEFT-OFF--ON/RIGHT.
See Figure 2-36.
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