1.    Refer to parts drawing Figures A, B, C & D.

    2.    Remove cover plates, pc #9, #10 and #11.
Do not remove gear frame retaining plate, pc#48.

    3.    Note the position of the racks, pc #19. The racks should be in the up position as shown in Figure A.

    4.    Note the position of the three (3) center punch marks on the end of the input shaft, pc #4. These center punch marks show the position of the lug on the lug sleeve, item No. 5.

    5.    With the input shaft as shown in Figure A, pull the idle gear, pc #18, and hold it out of engagement with the input pinion pc #47.

    6.    Rotate the handwheel on the input shaft clockwise until the valve reaches the extreme position of travel. With a normally clockwise handwheel rotation to close , the valve will go to the full closed position. If the valve is clockwise handwheel rotation to open, the valve will go the full open position.

    7.    Place the input shaft in position as shown Figure C.

    8.    Using a screwdriver, rotate the input pinion, pc #25 A, as shown in Figure B clockwise until the rack, pc #19A, moves downward as shown in Figure C. Do not rotate the pinion any further.

    9.    Push idler gear, pc #18, into engagement and rotate input shaft clockwise to check the setting. The lug should hit the rack and prevent further handwheel rotation.

    10.    Reassemble cover, pc #11, with two mounting screws to hold idler gear, pc#18 engaged with the input pinion and rotate the input shaft, pc #4, counter-clockwise to the other extreme valve position. If the rack, pc #19 B  should trip to the down position as shown in Figure D, before the valve reaches the extreme position of travel, turn the input shaft back one turn, pull out of engagement, pc #18, place a screwdriver on the input pinion, pc#25B, and rotate clockwise approximately 50 turns. Push idler gear, pc #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.

    11.    With the valve in the position to be set, position the input shaft as shown in Figure D, hold the idler gear, pc #18 out of engagement, and with the screwdriver on pc #25 B, rotate the input pinion counter-clockwise until the rack, pc #19 B, moves as shown in Figure D. Do not rotate the pinion any further.

    12.    Push idler gear, pc #18, into engagement and rotate input shaft counter clockwise to check setting. The lug should hit the rack.

    13.    Reassemble covers, pc #9, #10 and #11.

    14.    Open and close the valve fully to be certain position limit stops are set at the desired valve position.