6.4Line up the bushings of the new disc pack with the reamed holes in the ring, lightly tap on the bushings to start them into the holes. Insert 3 disc pack bolts and nuts with the bolt heads in the ring counterbore hole, tighten them evenly to pull the bushing into the ring flange (see Figure 7).
DISK PACK NUT
DISK PACK
BUSHING
ADAPTER RING
SPACER
DISK PACK BOLT
Figure 7. Bolt Disc Pack to Adapter Ring.
6.5Line up the bushings with the spacer reamed holes, lightly tap the bushings to start them in the holes. Install and tighten 3 disc pack bolts and nuts with bolt heads in the ring (see Figure 8).
DISK PACK BOLT
ADAPTER RING
DISC PACK
BUSHING
SPACER
DISC PACK NUT
Figure 8. Bolt Disc Pack to Spacer.
6.6Torque all disc pack fasteners evenly and in successive steps to the value specified in Table 2.
Coupling | Tightening Torque (Lightly Oiled) | |||||
KD2 |
|
| KD20 | |||
Size |
|
| ||||
|
|
| ||||
103 | 8 |
| 10 |
| ||
153 | 30 |
| 40 |
| ||
203, 204 | 50 |
| 70 | 55 |
| 75 |
253, 254 | 75 |
| 100 | 55 |
| 75 |
303, 304 | 120 |
| 160 | 115 |
| 160 |
353, 354 | 190 |
| 260 | 175 |
| 240 |
403, 404 | 290 |
| 390 | 280 |
| 380 |
453, 454 | 320 |
| 430 | 280 |
| 380 |
504 |
| 420 |
| 570 | ||
554 |
| 730 |
| 1000 | ||
604 |
| 1020 |
| 1400 | ||
705 |
| 1800 |
| 2450 | ||
805 |
| 2300 |
| 3100 | ||
905 |
| 2300 |
| 3100 | ||
Table 2. Disc Pack Bolt Tightening Torques.
KD20
6.7Remove the center assembly in reverse order as per the applicable assembly procedure.
6.8Unbolt the adapter ring from the disc pack. Unbolt the disc pack from the spacer.
6.9Clean and deburr all of the coupling parts.
6.10Line up the new disc pack between the adapter ring and the spacer. Insert the disc pack bolt into the counterbored hole in the adapter ring, and through the disc pack.
6.11Make sure that the spacer is properly indexed for the large clear- ance holes to receive the bolt ends. Place the spacing washer and disc pack nut on the bolt. Repeat for the other bolts (see Figure 9).
DISC PACK NUT
SPACING WASHER
DISC PACK
ADAPTER RING
SPACER
DISC PACK BOLT
Figure 9. Bolt Disc Pack to Adapter Ring.
6.12Place a spacing washer over a disc pack bolt. Insert the bolt through the large hole in the adapter ring and through the disc pack bushing and reamed hole in the spacer. Place the disc pack nut on the bolt. Repeat for the other bolts (see Figure 10).
ADAPTER RING
SPACING WASHER
DISC PACK
DISC PACK NUT
SPACER
DISC PACK BOLT
Figure 10. Bolt Disc Pack to Spacer.
6.13Torque all disc pack fasteners evenly in successive steps to the value specified in Table 2.
7.0Dynamic Balance
Balanced parts will be marked with the letter “B.” The couplings may be component balanced (hubs and center assembly) with no match marks, or assembly balanced as a complete coupling with match marks of the hub to ring connections. If the coupling is supplied with match marks, it must be assembled with the match marks in line.
Note: For balanced couplings, disconnecting the disc packs from the cen- ter assemblies disturbs the balance of the coupling. When disc packs are replaced in balanced couplings, the couplings must be balanced before placing back in operation.
8.0Finish Boring and Keyways
Coupling hubs are often furnished with a “rough stock bore.” This rough bore is not necessarily concentric to other hub diameters. To prepare for boring,
Disconnect all power before adjusting units
© Emerson Power Transmission Manufacturing, L. P. or affiliates 2002. All Rights Reserved.