Adjusting Downfeed Clutch Lever - Grizzly G9901 Owner's Manual

5.
Looking into the cavity left by removing the
mounting plate assembly, identify the two
adjusting screws (see Figure 74).
Figure 74. Y-axis lead screw adjusting screws.
Note: The bottom screw adjusts the amount
of backlash; and the top screw, when tight-
ened down, locks the bottom screw setting.
6. Loosen the top screw, and tighten the bottom
screw until slightly snug.
7.
Re-tighten the top screw to lock the bottom
screw setting.
8.
Temporarily slide the ball handle back on
the lead screw and rotate it back and forth to
check the amount of backlash. Repeat Steps
6–7 if necessary.
9.
Re-install the mounting plate assembly, spac-
ers, graduated dial assembly, and ball handle
in reverse order of the steps above.
Note: Take care not to damage the mating
surfaces of the mounting plate assembly
bearings and the lead screw.
Model G9901/G9902/G9903 Milling Machine
Adjusting Downfeed
Clutch Lever
The downfeed clutch lever is adjusted at the fac-
tory and should not need adjustment for many
hours of machine use, if ever. The downfeed
clutch lever disengages once the quill dog comes
in contact with the downfeed stop. If this does not
occur, re-adjust the lever.
To adjust the downfeed clutch lever:
1.
DISCONNECT THE MILL FROM POWER!
2. Loosen the locknut shown in Figure 75.
Figure 75. Downfeed clutch lever adjusting
screw and locknut.
3. Move the manual/power downfeed selector to
the manual or "hand" position (refer to Page
35 for the location of downfeed devices).
4.
While holding the downfeed clutch lever to
the left, use the fine downfeed handle to
move the spindle down until the clutch lever
stays engaged by itself.
5. Move either the spindle down or the downfeed
stop up until the quill dog and downfeed stop
are in contact without disengaging the clutch
lever.
6. Turn the adjusting screw until the clutch lever
disengages, then re-tighten the locknut.
7. Check to make sure the downfeed clutch
lever disengages during downfeed opera-
tion.
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