Pulsafeeder Pulsa Series Pulsamatic Controls - Manual (Page 16)

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4. Remove the cotter pin, Item #539, nut, Item # 535, and washer, Item #534 from the end of the
diamond screw shaft on top of the housing.
5. Remove the screws to the rear gearbox cover, Item #526A.
6. Lift the cover slightly and pull it back towards the motor. As the shaft disengages, the miter
gear, Item #533, bushing, Item #532, and bushing pin, Item #538, will come loose. Don’t
allow them to fall into the gear box.
7. Check to see that the block Item #352, inside he oscillating housing, Item #358, is at the top by
turning the miter gear, Item #357, clockwise. Ref to Figure 5.
8. Set the stroke indicator two digits lowers than the setting at which the limit switch opened
(See Step 2 of “Preliminary Check”).
9. If the diamond shaft is dry, lightly coat it with grease.
10. Hold the cover of the pump and insert the shaft into the housing bore as you lower the cover in
place. Make sure that the miter gear, bushing and bushing pin are in place and that the stroke
remains as set in Step 8.
11. Replace the washer and nut on the shaft. Snug the nut and then back it off to the nearest hole
for insertion of the cotter pin.
12. Replace the cover screws, subcover and coupling guard.
13. With the handwheel fully clockwise, the stroke position indicator should read (000. If not,
remove the handwheel assembly from the cover assembly, turn to the (000) setting and
replace.
14. Align the potentiometer as described under “Repairs”.
15. Confirm free operation of mechanism and limit switch setup, as described under “Installation”.
6.4 Brake Air Gap
1. Check the axial air gaps between the mating halves of the brake and clutch assemblies, Items
#638 and #646 on Figures 6 and 7. The gap specifications are 0.010-0.040 inches.
2. If either brake drags without being energized and the gap is less than 10 mils, equally shim all
three spacer sleeves, Items #608, to increase the air gap to the specified range. Refer to Figures
6 and 7. Item 607 denotes shim location on the illustrations, but as a spare part. It consists of a
pack of six 20-mil shims and twelve 5-mil shims.
NOTE: Care must be taken in this adjustment as permanent damage can result. We recommend
that all other possible causes listed under “Troubleshooting-Brake Slipping” be investigated
first.