Duff-Norton Ball Screw Translating - Manual (Page 7)

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careful that the ball screw does not run out of
the ball nut assembly (7). Depending on the
model of the jack, the top load baring may fit
either on top of the ball nut or the worm gear
(10)
Note
If the top load bearing fits on the ball nut, the
bearing should be approximately centered on
the nut and the shell cap should be carefully slid
onto the ball screw and screwed into the hous-
ing.
15. Install shell cap (2) and screw down tight.
Note
Shell cap flange does not necessarily have to
bear against top of shell; there will usually be a
gap. This should put a slight drag on the worm.
If the worm is hard to turn, back off slightly on
the shell cap.
16. Tighten shell cap set screws (1).
Note
If new parts have been installed, it may be
necessary to respot holes for these screws.
17. Manually operate unit to ensure proper function-
ing of all components prior to installation.