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TM 5-4120-259-15
STEP 1.
DISCONNECT POWER FROM UNIT.
STEP 2.
REMOVE FRONT PANEL (FIG. 13).
STEP 3.
REMOVE MOUNTING SCREWS.
STEP 4.
DISCONNECT ELECTRICAL CONNECTOR.
STEP 5.
DISCONNEGT SAMPLING TUBING BY REMOVING SCREWS WHICH SECURE BELLOWS TO
SWITCH.
STEP 6.
REMOVE COVER.
INSTALL PRESSURE SWITCH IN REVERSE QRDER OF REMOVAL STEPS.
ADJUST SWITCH BY SETTING LOW PRESSURE INDICATOR AT 25 PSI, DIFFERENTIAL AT 25 PSI,
AND HIGH PRESSURE INDICATOR AT 440 PSI.
Figure 36. Dual Pressure Switch, Adjustment, Removal And Replacement.
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