ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
CHEMICAL INJECTION SYSTEM
6. Start-up/prime the new Chemical Injection Pump as follows (see Figure 4):
CAUTION
The speed knob turns the injection pump on and must be set first. Do not attempt
to adjust the stroke knob until the speed knob is set. Damage to the injection
pump will result if the speed knob is not set first.
a. Turn the speed knob clockwise to turn the pump on.
b. Set the speed knob at 80%.
c. Then set the stroke knob at 100%.
SPEED KNOB
STROKE KNOB
Figure 4. Chemical Injection Pump Control Knobs.
d. Turn the relief knob (black knob) of the four-function valve 1/4 turn (see Figure 2).
e. The suction tubing should begin to fill with solution from the chemical solution bucket.
f. A small amount of solution will begin to discharge out the return tubing of the four-
function valve. Once this happens, turn the relief knob another turn (black knob see
Figure 2)
g. The pump is now primed.
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