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

Scheduled Maintenance4.9.9.2. Models 5G and 5H Shunt Contacts C7, C8, D1 and D2Normal and reverse contacts should be completely adjusted before attempting to adjustthe shunt contacts.Table 4–17. Point Detector Contact Adjustment Procedure ForNormal, Reverse, and Snub Contacts (Models 5E and 5F Normal and Reverse ContactsC5, C8, D1 and D4, and Snub Contacts C3, C4, D5 and D6; Models 5G and 5H Normaland Reverse Contacts C3, C6, D3, and D6)StepAction1 Shunt contacts should make only after normal and reverse contacts areopen, and normal and reverse contacts should make after appropriate shuntcontact is open.2 Verify that opening of shunt contact is about 7/32 inch. Adjust opening byloosening screw (2), lifting adjuster tip out of hole, and moving contact (1) inor out as required. Retain adjustment by setting adjuster tip in new hole andtightening screw.3 Align contact tip (1) with contact tip (3). These should make at least 75percent of their full width when contact is closed.4 Adjust tip of movable contact so there is about 1/64 to 1/32 inch contactwipe. Bend tip down to increase contact wipe.P1293, Rev. Jun/07 4–34 Alstom Signaling Inc.