2.
During-operation checks. Follow these procedures for during-operation checks.
a. Control Panel Assembly. Monitor the smoke temperature indicator and adjust the fog oil
flow control knob to ensure the generator maintains a normal operating temperature. Turning the fog oil
flow control knob clockwise increases the fog oil flow into the combustion chamber and lowers the
engine temperature. Turning the fog oil flow control knob counterclockwise decreases the fog oil flow
into the combustion chamber and raises the engine temperature.
b. Fog Oil Tank Assembly. Periodically check the fog oil tank sight glasses to determine the
remaining fog oil supply.
c. Fuel Cans. Constantly monitor generator operating times to determine the approximate
remaining fuel supply in the fuel cans. One fuel can holds 5 gallons of fuel. One M54 Smoke Generator
uses approximately 3 gallons of fuel per hour.
PART C -- STOP THE M157 SMOKE GENERATOR SYSTEM
AND PERFORM AFTER-OPERATION CHECKS
As soon as the smoke mission is completed, the smoke generator operator will stop the M157 Smoke
Generator System and perform after-operation checks to ensure the set is prepared for the next smoke
mission.
1.
Stopping Procedures. Follow these procedures for stopping the M157 Smoke Generator System
(Figure 3-4).
CAUTION
Steps 1, 2, and 3 must be accomplished within 30 seconds to prevent the
pulse-jet engine from overheating.
Step 1.
Turn the fog oil flow control knob (1) fully counterclockwise.
Step 2.
Set fog oil switch (2) to the OFF position.
Step 3.
Allow the engine to run for the remainder of the 30 seconds, and then set the
engine switch (3) to the OFF position.
Step 4.
Set the fuel switch (4) to the OFF position.
3-7
CM3305
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