(a) Check each individual contact at itsedge (insert A) with a force gauge. Preload shouldbe between 1-1/2 -2 1/2 lbs. This can be attainedby adding or removing shim (see chart, figure 6-1A).(b) Preload is checked by the initialbreakaway of the E ring at point B, figure 6-1A.Preload should be between 1-1/2 to 2-1/2 lbs. Thiscan be obtained by adding or removing shim (Seechart, figure 6-1A).(2) After assembly of the actuator assembly(64, figure 6-l), refer to figure 6-lB and per-form the following adjustment procedures(a) Leave four screws (1) loose.(b) Clamp assembly at points A and B toassure no-air gap at points C and D.(c) With assembly clamped, tighten fourscrews (1).(d) Remove clamp.(e) Insert feeler gauge (0. 150 + 0.010 in.)into movable core gap and adjust guide screws (2)evenly until gauge is snug throughout the parimeter.(f) Secure after adjustment by tighteningtwo nuts (3).(3) Contactor adjustment.(a) Contact overtravel. Refer to figure6-lC and proceed as follows:(1) Attach indicator lamp on ohmeter toterminal A1-A2 & C1-C2.(2) Insert 0.035 gauge into movablecore cap (A).(3) Apply 24 VDC to coil.(4) Adjust carrier bushings at point (B)until continuity is made on A1-A2 & C1-C2.(5) Secure by tightening nuts (l).(6) Recheck continuity at 0.035. Nocontinuity at 0.040 readjust if necessary.(b) Economizing switch. Refer to figure6-lC and proceed as follows:(1) Adjust switch bracket (3) totransfer switch. Check that white button is fullydepressed and allow approximately 0.010 clearancebetween white button and tap operator (point C).Secure screws on bracket.(2) Insert 0.010 gauge into movable coregap (A).(3) Apply 24 VDC to coil.(4) Adjust lower tap (D) by bending totransfer switch.(5) Recheck0.010 gauge transfer0.018 gauge no transferReadjust if necessary(c) Auxiliary contacts. Refer to figure 6-lCand proceed as follows:(1) Before adjustment, set lift comb item(5) so that the deflector on the guide leaf springs(6) are near equal in energized and de-energizedposition. Secure by tightening nuts (4).(2) Normally closed. Insert 0.018guage between guide rod head and operator plate,(point D 2 places).Adjust stationary contacts tojust touch the movable contact (use indicator light) -recheck with 0.025 gauge at point (D). No continuity.Readjust if necessary.(3) Normally Open. Same as normallyclosed except shims are inserted into movable coregap (point A).Change 1 6-4A
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