Flowserve HBC Series Limitorque User Manual

Page 19

Limitorque HBC Series FCD LMENIM3501-02-AQ – 10/14

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9. Reassemble the Gear Frame Through Cap (piece #11) with two mounting screws to hold the Idler Gear (piece

#18) engaged with the Input Pinion (piece #25A) and rotate the Input Shaft (piece #4) counterclockwise to
the other extreme valve position. If the Rack (piece #19B) should trip to the down position as shown in
Figure 5.1D before the valve reaches the end of travel, use the following procedure:

a. Turn the Input Shaft (piece #4) back one turn.

b. Pull Idler Gear (piece #18) out of engagement.

c. Place a screwdriver on the Input Pinion (piece #25B).

d. Rotate clockwise approximately 50 turns.

e. Push Idler Gear (piece #18) into engagement again and rotate handwheel counterclockwise until the valve

goes to the extreme position of travel. Repeat as necessary until the valve reaches the point where the stop
should be set.

10. With the valve in the position to be set, position the Input Shaft (piece #4) as shown in Figure 5.1D, hold the

Idler Gear (piece #18) out of engagement, and with the screwdriver on the Input Pinion (piece #25B), rotate
it counterclockwise until the Rack (piece #19B) moves, as shown in Figure 5.1D. Do not rotate the pinion any
further.

11. Push the Idler Gear (piece #18) into engagement and rotate Input Shaft (piece #4) counterclockwise to check

setting. The lug should hit the Rack (piece #19B).

12. Reassemble Limit Stop Housing Cover (piece #9), Gear Frame Housing Cover (piece #10), and Gear Frame

Through Cap (piece #11).

13. Open and close the valve fully to verify that position limit stops are set at the desired valve position.

NOTE: When the AWWA input shaft stop is supplied, the standard limit stops in the housing are also furnished.
The housing limit stops should be adjusted to function as secondary stops by ensuring that the AWWA input stops
engage first. Section 2 – Inspection, Installation, and Mounting Procedures in this manual provides instruction for
setting the standard housing limit stops.