Quantcast Figure 71.26. Circulating pump switch.

 

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Figure 71.23. Flame switch removal and installation
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TM-5-4210-205-12 Truck Fire Fighting; Powered Pumper; Foam and Water 500 G.M.P.; Centrifugal Pump Power Take Off Driven; 400 Gal. Water Tank 40 Gal. Manual
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Limit Switch
(2) With  the  flame  switch  at  room
temperature, loosen the adjusting screw
until a distinct click is heard. Then tighten
the screw until a second click occurs. At
this point continue to tighten for three-
eighths of a turn to correctly position the
adjusting screw.
c.
Flame Switch Test.
(1) At room temperature, check for continuity
across terminals 2 and 4 and terminals 2
and 5 (fig. 71.23) with an ohmmeter. If
continuity exists, continue the test.
(2) Apply heat to the flame switch tube. The
switch should change to hot position at
400 to 500oF. Continuity should now be
across terminals 1 and 2 and terminals 1
Figure 71.25. Limit switch, removal and installation.
and 5. Allow the
Figure 71.26. Circulating pump switch.
AGO 5667A
24

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