Emerson VSR, VSM, VSS service manual Installation, E. Final assembly

Installation

will result in a flexing element that is centered and parallel to its mating flange faces. Move the con- nected equipment to accomplish the above.

NOTE: The disc pack is designed to an optimal thick- ness and is not to be used for axial adjustments.

See documentation that came with the coupling for complete specifications.

3.Angular Alignment. Rigidly mount a dial indicator on one hub or shaft, reading the face of the other hub flange, as shown on next page. Rotate both shafts together, making sure the shaft axial spacing remains constant. Adjust the equipment by shim- ming and/or moving so that the indicator reading is within .002 inch per inch of coupling flange.

4.Parallel Offset. Rigidly mount a dial indicator on one hub or shaft, reading the other hub flange out- side diameter, as shown in Figure 3. Indicator set-up sag must be compensated for. Rotate both shafts together. Adjust the equipment by shimming and/ or moving so that the indicator reading is within

.002 inch per inch of the axial length between flex elements. See drawing below.

Note: If the driver or driven equipment alignment specification is tighter than these recommendations, the specification should be used. Also, be sure to compensate for thermal movement in the equipment. The coupling is capable of approximately four time the above shaft alignment tolerances. However, close alignment at installation will provide longer service with smoother operation.

E. Final assembly

With the coupling in good alignment the bolts will fit through the holes in the flanges and the disc packs more easily.

1.If the coupling arrived assembled, the disc packs are still attached to the center ring. Before tak-

Note: Alignment of C-Flange Units should be checked when compressor or motor are replaced.

ing the discs packs off, first install one hub bolt through each disc pack and secure with lock out. This will help when the pack is reinstalled late. If the coupling was shipped disassembled, the bolt through the pack is not required as the discs in the pack are factory taped together.

2.Remove the long bolts. Mount the disc packs on the hubs with one bolt through the disc pack aligned with a clearance hole in the hub. Install the short bolts through the hub, disc pack, bevel washer or link, and secure with a lockout.

NOTE: All bolt threads should be lubricated. A clean motor oil is recommended. On size 226 and larger, a link must be put on bolt first. Remove the disc pack alignment bolt. Proceed to mount the second disc pack to the other hub in the same way.

3.Position one set of short bolts in each hub on top. Now slide the center ring down into place straddling the short bolts with the center ring bushings. If coupling is dynamically balanced, the center ring match marks must lineup with both hub match marks. When one bushing is in-line with the hole in the disc pack, slide one long bolt through washer or link, disc pack, center ring, disc pack, washer or link, and then secure with a locknut. On size 226 and larger a link must be put on the bolt first. Now install the rest of the long bolts in the same manner.

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