Grizzly G4003G Owner's Manual page 79

11. Insert chuck key into a cam socket to prevent
spindle from turning, then tighten inner span-
ner nut until dial indicator needle just stops
moving (see Figure 125).
Figure 125. Adjusting spindle bearings.
Note: For convenience and accuracy, we
recommend having another person watch the
dial while you tighten the inner spanner nut.
While tightening the inner spanner nut,
rock the spindle back and forth slightly with
the chuck key to make sure the spindle
tapered roller bearings seat properly in their
races.
When the dial indicator needle stops mov-
ing, there will be no spindle end-play and no
bearing preload. It is important that you find
this point without tightening the spanner nut
too much and inadvertently preloading the
spindle bearings.
If you think you have gone past the zero end-
play point, unload the bearings by repeating
Steps 7–8, then retighten the inner spanner
nut until it has reached the zero end play
position.
Model G4003G (Mfd. Since 1/15)
12. Tighten spanner nut an additional
its circumference. See Figure 126 for exam-
ple of this measurement.
Figure 126. Final spanner nut rotation.
13. Without allowing inner spanner nut to tighten
any further, install and tighten outer spanner
nut against theinner nut.
Do not overtighten outer spanner nut because
additional preload can force bearings even
tighter against races in headstock and cause
headstock to compress, or crack, or cause
bearing failure.
14. Re-install outboard spindle cover.
⁄ " along
1
16
⁄ " Travel
1
16
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