Carrier 17 Start Up & Operation Manual

Contents

NEAR FINAL ALIGNMENT — Once the machine com-ponents are within dial indicator range, the adjustments formisalignment should be made in a specific sequence. Thefour positions of alignment described below are arranged inthe recommended order.1. Angular in elevation — This alignment is adjustedwith shims and is not readily lost in making the otheradjustments.2. Parallel in elevation — This alignment is also made withshims, but it cannot be made while there is angular mis-alignment in elevation.3. Angular in plan — This position can easily be lost if placedahead of the two adjustments in elevation.4. Parallel in plan — This adjustment cannot be made whilethere is still angular misalignment in plan, and can easily belost if elevation adjustments are made.Correcting Angular MisalignmentPreparation — Shaft angular misalignment is measured onthe face of the coupling hubs or on brackets attached to eachshaft (see Fig. 38 and 39). Brackets are preferred since theyextend the diameter of the face readings.Attach a dial indicator to one coupling hub or shaft andplace the indicator button against the face of the oppositehub. Position the indicator so that the plunger is at approxi-mately mid-position when the dial is set to zero. Both shaftsshould be held tightly against their thrust bearings when thedial is set and when readings are taken.To be sure that the indicator linkage is tight and the buttonis on securely, rotate the coupling exactly 360 degrees. Thedial reading should return to zero. Accept only repeatablereadings.Fig. 37 — Checking Preliminary AlignmentFig. 38 — Measuring Angular Misalignmentin Elevation71