Section V. OPERATION UNDER UNUSUAL CONDITIONS

2-9. Stopping

d. After running for a time, the pump will suck

the fluid up into the pump pot and will discharge it

To stop the pump, shut down the engine by moving

through the discharge hose. The time before the

the ignition switch (2, fig. 2-2 ) to the OFF (down)

actual pumping operation begins depends upon the

position. Close the fuel shutoff valve.

height of the suction lift and the condition of the

Note: If the engine and pump have been running under

pump.

heavy load for an extended period of time, move the throttle

e. If the pump fails to start pumping after a

control level slowly to START & IDLE position, allowing the

reasonable time, consult the troubleshooting chart

engine to run for several minutes at lower speeds to distribute

the engine heat and prevent warping of the engine parts.

(table 3-2) to diagnose and correct the trouble.

f. After pumping operation has started, adjust

2-10. Operation

the throttle lever (1, fig. 2-2) on the engine to

Operate the reciprocating pump under usual

p r o v i d e an operating speed that will give the

conditions as follows:

required pumping rate.

a. Make sure the strainer at the end of the

g. Clean the strainer f r o m t i m e t o t i m e t o

suction hose and the end of the suction hose are

prevent obstructions from disrupting the pumping

fully submerged. Make sure that the end of the

operations.

discharge hose is not restricted.

h. Check the fuel level from time to time and fill

b. Start the engine (para 2-8). After warmup,

the tank if necessary to prevent the engine from

operate the throttle control to full-speed operating

running out of fuel.

position.

Warning: Shut o f f t h e e n g i n e before

c. If the suction lift is less than 15 feet, pump

filling the fuel tank. Take care to prevent

priming is normally not necessary. If the suction lift

spilling gasoline on a hot engine. The gasoline

is greater than 15 feet, remove the accumulator ca

can ignite, causing severe injury or death to

(1, fig. 2-1 ) and pour two gallons of water into the

the operator.

accumulator to prime the pump. Install the ac-

i. If the temperature changes markedly during

cumulator cap and tighten securely, making sure

the operating cycle, adjust the inlet temperature

the gasket is in place.

control to compensate for the change.

Section

OPERATION

UNDER

UNUSUAL

CONDITIONS

2-12. Operation in Extreme Heat

2-11. Operation in Extreme Cold (Below 0 F

(--18 C) )

To operate the pump in extreme heat, proceed as

follows :

T O operate the pump in conditions of extreme cold,

a. Do not run the engine faster than necessary to

proceed as follows:

pump water at the required rate.

a. Keep the fuel tank filled when the unit is not

b. Refer to the current L.O. for the lubricants

in operation.

required during operation in extreme heat.

b. Service the fuel filter frequently to prevent ice

c. Protect the unit from direct sunlight. Provide

crystals from clogging the filter element.

shade for the unit whenever possible.

c. Refer to the current L.O. for the lubricants

d. Make sure the engine inlet temperature

required during operation in extreme cold.

control (1, fig. 2-4) is pulled out all the way.

d. Take care to allow the engine to reach

e. Take special care to run the engine at a slower

operating temperature before operating it at full

speed before shutdown to distribute the engine heat

speed.

and minimize the possibility of warping the metallic

e. Make sure the engine inlet temperature

parts.

control (1, fig. 2-4) is pushed in all the way.

f. Drain the fluid from the pump and hoses

2-13. Operation in Dusty or Sandy Areas

immediately upon shut-down. To drain the pump,

Note the following when operating the

remove the drain plug (4, fig. 2-1 ) in the diaphragm

reciprocating pump in dusty or sandy areas:

pot. Lift the suction hose from the fluid being

a. Use extreme caution to prevent the lubricants

pumped and allow it to drain. Drain all fluid from

from becoming contaminated with dust or sand.

the discharge hose.

b. Check the engine air filter service indicator

Caution: Always drain the pump when

(3, fig. 2-4) frequently and service the air cleaner

freezing temperatures may be encountered.

when necessary.

Solid ice in the pump will delay pump

c. Prevent dust and sand from entering the fuel

operation until it can be completely thawed,

system. Service the fuel strainer frequently to

and freezing of the trapped fluid may result in

prevent dust and sand from accumulating in the

the cracking of the metal parts.

fuel bowl.

2-6