Owner`s manual
8
MAINTENANCE
balls.
Place the Ball Nut Assembly over the pocket and
remove the two Clamp Screws and the Guide
Clamp.
Remove both halves of the guide simultaneously
to prevent distortion of either half.
Catch all the Balls on the cloth by slowly rotat-
ing the Ball Nut on the screw. Place all balls in a
small container. Take an accurate ball count and
record.
CAUTION EVERy BEARING BALL IS RE-
qUIRED FOR REASSEMBLy. ExERCISE CARE
IN hANDLING TO AVOID LOSS.
Remove the stop collar (5) held by set screw (3)
at the free end of the screw shown in Figure 4-8.
Slide the Ball Nut off the free end of the screw.
BALL NUT INSPECTION
Disassembly of the ball nut must be completed to
permit inspection (Refer to ball nut disassembly on
page 7). A Ball Bearing Replacement Kit containing
2.
3.
4.
5.
6.
bearing balls and ball guide is available from Mar-
ket Forge parts distributors. Should the ball nut show
excessive wear I the entire Saginaw Screw assem-
bly must be replaced. Inspect components for wear
points:
Balls. Check a random sample of 20 balls for
signs of scufng or sh scaling. Diameter varia-
tion between balls and true roundness of each
one must be within .0001 inch. Balls which fail to
meet these requirements should be replaced us-
ing the Ball Bearing Replacement Kit.
Guide. Inspect the pick-up ngers which consist
of short extensions at the end of each half guide.
Minor burrs can be removed and the guide re-
used. If a ball impression appears on the nger
tips or the halves were distorted during removal,
the guide must be replaced.
Ball Nut. Inspect the internal threads of the ball
nut for signs of excessive wear, pitting, gouges,
corrosion or spotting in the ball groove area. If
these aws are detected, the entire Saginaw
Screw assembly should be replaced.
a.
b.
c.
Figure 3 Ball Nut Assembly