Grizzly G9036 Owner's Manual page 56

4.
place the chuck key in the cam-lock socket
to keep the spindle from rotating, and remove
the outer spanner nut shown in figure 96.
figure 96. spindle spanner nuts.
5.
loosen the inner spanner nut one turn.
note: You may have to tap on the outboard
spindle tube as explained in Step 7 to help
unload the spindle and break the spanner nut
loose.
6. place a wooden block over the outboard end
of the spindle, and hit it soundly with a small
sledge or heavy dead blow hammer (figure
97). your goal is to slide the spindle forward
just enough to introduce spindle end-play that
you can feel by hand.
figure 97. introducing detectable end-play on a
typical lathe.
-54-
7.
inner
spanner
nut
outer
spanner
nut
8.
9.
place a dial indicator on the cross slide and
move the carriage toward the headstock until
the contact point of the indicator touches the
spindle face (figure 98).
figure 98. dial indicator setup.
Move the carriage an additional 0.100" toward
the headstock.
insert the cam key into a cam socket to pre-
vent the spindle from turning, then tighten
the inner spanner nut until the dial indicator
needle just stops moving (figure 99).
While tightening the spanner nuts, rock the
spindle back and forth slightly with the cam
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 essential that you find
this point without tightening the spanner nut
too much and inadvertently preloading the
spindle bearings.
figure 99. Adjusting spindle bearings.
Model g9036 Mfg. 7/08+