3.0Alignment
Note: Exact values and procedures for aligning equipment are normally specified by the equipment manufacturers. Good initial alignment to the minimum possible values will promote optimum machinery per- formance and eliminate potential operating problems. After securely tightening the foundation bolts, the hub separation and alignment should be rechecked and adjusted if necessary.
The coupling alignment should be checked periodically. Even when a coupling is well aligned at installation, subsequent settling of foundations, shifting of equipment, etc., may cause the alignment to deteriorate.
Offset and Angular Alignment
3.1Reverse dial indication or optical methods of alignment (such as la- ser) are recommended. A cold alignment and a hot check (with cor- rections if necessary) are required. The hub flange OD can be used to mount the alignment equipment. The hub flange OD is machined to be concentric to the coupling bore and can be used as the reference diameter.
3.2The maximum recommended operating misalignment is:
0.10 degrees per disc pack
(0.0035 in/in TIR equivalent parallel offset)
Important: Total misalignment is the combination of equipment par- allel offset and angular misalignment.
Note that improving the alignment below these values will promote optimum machinery performance.
Axial Alignment
3.3Align the hubs until they are at the correct hub separation. The hub separation is measured from the two flange faces, not from the pilot face.
Hub Separation = Center Assembly Length
4.0Final Assembly (KD2 and KD20)
4.1After correctly installing both hubs, use the separate collapsing screws to pull the adapter rings toward the center of the
ADAPTER RING | COLLAPSING BOLT |
DISC PACK
SPACER
Figure 4. Collapsing center section
4.2For each side of the center section, insert the collapsing bolts through the spacer clearance holes into tapped holes in the ring (see Figure 4).
4.3Tighten them evenly and collapse the disc packs equally, only enough to allow the center assembly to drop into place (see Figure 5).
CENTER ASSEMBLY
HUB BOLTS
O.D. PILOT
Figure 5. Installing center section.
4.4Put the center assembly (spacer and rings) between the rigid hubs, engage the pilot, and install the hub bolts in one hub flange.
4.5Release all the collapsing bolts, and install the hub flange bolts on the second rigid hub flange.
4.6Torque the hub flange bolts to the value specified in Table 1.
Coupling | Tightening Torque (Lightly Oiled) |
| ||||
Size | KD2 |
| KD20 |
| ||
|
|
| ||||
103 | 8 |
| 10 |
| ||
153 | 8 |
| 10 |
| ||
203, 204 | 30 |
| 40 | 50 |
| 70 |
253, 254 | 30 |
| 40 | 50 |
| 70 |
303, 304 | 75 |
| 100 | 110 |
| 150 |
353, 354 | 75 |
| 100 | 150 |
| 200 |
403, 404 | 150 |
| 200 | 270 |
| 370 |
453, 454 | 150 |
| 200 | 270 |
| 370 |
504 |
| 430 |
| 580 | ||
554 |
| 640 |
| 870 | ||
604 |
| 640 |
| 870 | ||
705 |
| 1120 |
| 1500 | ||
805 |
| 1470 |
| 2000 | ||
905 |
| 1470 |
| 2000 | ||
Table 1. Flange Bolt Tightening Torques.
5.0Removal
5.1Disassemble the coupling in the reverse order as per the applicable assembly procedure.
5.2KEYED HUBS - Install a puller on the hub using the tapped holes provided in the hub face. Pull the hub off the shaft.
6.0Disc Pack Replacement
The terminology used to identify parts and the order of assembly may differ from one coupling style to another. Follow the instructions which match the coupling style being installed.
KD2 - For KD20 skip to 6.7
6.1Remove the center assembly in reverse order as per the applicable assembly procedure. Remove disc pack bolts and nuts.
6.2Insert the disc pack removal socket into one of the clearance holes in the spacer flange or ring (Figure 6). Install the removal cap screw and turn it until it cannot be tightened any more.
Note: The removal socket is supplied as part of the “parts kit”.
DISC PACK
CLEARANCE HOLE
BUSHING
REMOVAL SOCKET | REMOVAL SCREW |
|
WASHER
Figure 6. Bolt Disc Pack to Adapter.
6.3Remove the tool and repeat step 6.2 on all bushings to free the disc pack from the ring and spacer.
Disconnect all power before adjusting units
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