TM 5-3825-225-14&P
NOTE
The engine can be stopped from either the instrument panel Ignition
switch or the auxiliary control box ignition switch.
l. Turn off the ignition switch (7, Figure 2-1) to stop the engine.
m. Remove the foot valve (see Figure 2-3) from the water supply and clean debris from it.
n. Disconnect suction hose from the pump and stow each hose section in its rack.
o. Remove and clean inlet pump strainer.
p. Install inlet pump strainer and 4 in. (10.2 cm) dust cap (C, Figure 2-5).
Figure 2-5. Water Distributor Pump.
2-7. SPRAYING PROCEDURES.
NOTE
The spraying operation Is controlled from the tractor cab.
a. Start the engine (see paragraph 2-6h).
b. Open the air control valves (15, Figure 2-2) at the auxiliary control box.
c. Adjust the engine speed to approximately 2900 rpm and observe the spray pattern from the sprinkler
valves (F and G, Figure 2-3). If the spray pattern is acceptable, go to stepe.
d.
Adjust the sprinkler valve spray patterns.
(1) Adjust the engine speed to 700 rpm.
(2) Close the sprinkler valves (F and G).
(3) Adjust the spray width.
(a)
Loosen thumbscrew (11, Appendix F, Figure 86).
NOTE
The spray width Is controlled by the position of the adjusting band. When the adjusting band slot is alined with
slot in valve body, the spray will be at its widest point. To decrease the spray width, close the valve body
opening by turning the adjusting bands.
(b) Turn the nozzle adjusting band (9) to the required position.
(c) Tighten thumbscrew (11).
(d) Open the sprinkler valves (F and G, Figure 2-3).
(e) Adjust the engine speed to approximately 2900 rpm and observe spray width. Adjust the spray width
as necessary.
(4) Adjust the spray overlap.
(a) Turn the sprinkler valve to the required position.
(b) Open the sprinkler valves (F and G).
(c) Adjust the engine speed to approximately 2900 rpm and observethe spray overlap. Adjust the spray
overlap as necessary.
e. Drive the water distributor over the designated area.
f. Turnaround procedures. (1) Adjust' the engine speed to 700-1000 rpm.
(2) Close the sprinkler valves (F and G).
(3) Change direction.
TA506311
2-9
