Grizzly G0782 Owner's Manual page 83

6.
Place wood block over outboard end of
spindle. Tap it a few times with dead blow
hammer (see Figure 136). Your goal is to
slide spindle forward just enough to introduce
spindle end-play that you can feel by hand.
Figure 136. Example of unseating spindle
bearings to introduce spindle end-play.
7. Place dial indicator on cross slide and move
carriage toward headstock until contact
point of indicator touches spindle face (see
Figure 137).
Figure 137. Dial indicator setup.
8. Move carriage an additional 0.100" toward
headstock, and zero dial indicator.
Model G0782 (Mfd. Since 10/15)
9.
Insert chuck wrench into a cam socket to pre-
vent spindle from turning, then tighten inner
spanner nut only until dial indicator needle
stops moving (see Figure 138).
Note: For convenience and accuracy, we
recommend having another person watch the
dial while you tighten the inner spanner nut.
Figure 138. Example of adjusting spindle
bearing preload.
While tightening spanner nuts, rock spindle
back and forth slightly with cam key to make
sure spindle tapered roller bearings seat
properly in their races.
When dial indicator needle stops moving,
there will be zero spindle end-play and no
bearing preload. It is essential that you find
this point without tightening spanner nut
too much and inadvertently pre-load spindle
bearings.
If you think you have gone past the zero
end-play point, unload bearings by repeating
Steps 5–6, then re-tighten inner spanner nut
until it reaches zero end-play position.
10. Tighten inner nut an additional
11. Without allowing inner spanner nut to tighten
any farther, tighten outer spanner nut against
inner 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 bearing
may quickly fail.
12. Re-install end gear cover.
⁄ -turn.
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