ARMY TM 9-6115-464-34
AIR FORCE 35C2-3-445-2
NAVY NAVFAC P-8-624-34
(2) Economizing Switch.
(a) Apply 24 Vdc to connector pins A and B (See figure 3-105).
(b) Adjust placement of switch (88, figure 3-101) on bracket (89) so that green button of switch is
actuated by operator (57).
(c) Check that the switch button is fully depressed, and allow 0.010 inch clearance between the switch
button and the operator.
(d) Remove 24 Vdc. White button of switch should be actuated by Iower tab of operator. If not, bend
tab to actuate switch.
(e) Repeat steps (a), (c) and (d) to check switch operation.
(3) Auxiliary Contacts.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
These contacts should be adjusted so that the deflection on the guide leaf springs is nearly equal in
the energized and de-energized positions. Adjust screws (60) and nuts (62) to accomplish this.
With feeler gauge, measure any gap between operator (71 ) and detent (55), on both sides.
Insert a feeler gauge equal to the measured value plus 0.018 inch between (71) and (55), on both
sides.
Using an ohmmeter to determine continuity, adjust the stationary contacts of the normally closed
contacts until they just touch the movable contacts (see figure 3–105 for contact positions).
Replace the feeler gauges with a feeler gauge equal to the measured value plus 0.025 inch and
recheck for open circuit of normally closet contacts. Readjust if necessary.
Insert 0.018 inch feeler gauge between operator (71) and frame (76).
Apply 24 Vdc to connector pins A and B.
Using an ohmmeter to determine continuity, adjust the stationary contacts of the normally open
contacts.
Replace the 0.018 inch feeler gauge with a 0.025 inch feeler gauge by removing and reapplying 24
Vdc. Recheck for open circuit of normally open contacts. Readjust if necessary.
(4) Contact Overtravel.
(a) Tighten nuts (39) until Iockwashers (40) are flat.
(b) Attach an ohmmeter to terminals A1-A2.
(c) Insert a 0.035 inch feeler gauge between operator and frame (76).
(d) Energize coil by applying 24 Vdc across connector pins A and B (See figure 3-105).
(e) Check for continuity at a clearance of 0.035 inch and for open circuit at 0.040 inch.
(f) If these requirements are not met, select the proper thickness of washer (53, figure 3-101) until
they are met.
(g) Repeat steps (b) through (f) for terminals B1-B2 and C1-C2.
(5) Preload of Contacts.
(a) Using a force gauge, check each individual contact at its edge. Preload should be 1.5 to 2.5
pounds.
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