Flowserve HBC Series Limitorque - Manual (Page 13)

13
Limitorque HBC Series FCD LMENIM3501-02-AQ – 10/14
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Table 4.1 – HBC-0 through -3 parts list (refer to Figure 4.1)
Piece Number Description
1 Housing
2 Housing Cover
4 Through Cap
5 Drive Sleeve and Worm Gear
6 Worm Shaft
7 Spline Adapter
8 Pointer
9 Pointer Cap
10 End and Through Cap Gasket
11 Housing Cover Gasket
13 Worm Shaft Bearing
14 Drive Sleeve O-ring
15 Worm Shaft O-ring
18 Hex Nut Stop
19 Limit Stop Housing
20 Limit Stop Housing Cap
21 Limit Stop Housing Gasket
4.4 HBC-4 through -7
Refer to Figure 4.2.
1. Remove the Stop Screw Cover (piece #16).
2. Remove the Lock Screw and Stop Screw (total 2 each, piece #17).
3. Rotate the Worm Shaft (piece #6) full clockwise until Pointer Cap (piece # 9) stops rotating or until the Worm
Shaft (piece #6) can no longer be turned.
4. Remove the End Cap (piece #3) and Through Cap (piece #4).
5. Remove the Pointer Cap (piece #9) and Housing Cover (piece #2).
6. Remove the Worm Shaft (piece #6) by rotating and pulling from Housing (piece #1). It will be necessary to
slightly rotate or cock the Drive Sleeve (piece #5) away from the worm in order to allow the Bearing (piece #13)
to clear. It is not necessary to remove the Bearing (piece #13) from the Worm Shaft (piece #6).
7. Remove the Drive Sleeve and Worm Gear (piece #5).
NOTE: To reassemble the gearbox, proceed in the reverse order listed above. In order to ensure good stop nut
engagement at the end of travel, it is recommended that the stops be preset for 90° of rotation by establishing 45°
rotation on either side of the worm gear center line while installing the stop screws. It will then be necessary to
readjust the stops once the gearbox is on the valve; however, this will minimize the risk of disorienting the worm
gear sector.