Models 5E, 5F, 5G & 5H Electric Switch Machines: Single ... - Alstom

Scheduled Maintenance4.9.8. Point-Detector Contact Check And AdjustmentsNOTEBefore replacing or adjusting contacts, verify that the yoke moves freely,as forced by the springs pushing the horizontal yoke downward. Whenpoint detector is properly adjusted, rollers in the point-detector movementmust rest on bottom of slots in point-detector rods in both normal andreverse positions.Table 4–15. Point Detector Contact Check and Adjustment ProcedureStepAction1 Before replacing or adjusting contacts, verify that yoke to which contact (5)is attached moves freely, as forced by the springs pushing the horizontalyoke downward.When point-detector is properly adjusted, rollers in the point-detectormovement must rest on bottom of slots in point-detector rods in both normaland reverse positions.2 The proper fully-made position for normal and reverse contacts is below.The figures above and below also show this position for the shunt contacts.21/32" TO 1/16"C3, C63D3, D63 Contact pressure for normal and reverse contacts, measured very near thepoint of contact, should be 2-1/2 to 3 pounds, preferably nearer 2-1/2pounds, and is adjustable. See figure in step 2.1P1293, Rev. Jun/07 4–29 Alstom Signaling Inc.