Grizzly G9249 - Manual (Page 40)

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g9249 12" x 37" Belt drive gap Bed lathe
change Gears
Change gears are configured to provide a wider
range of feed rates and inch/metric threading.
use figure 55 and the descriptions below to
become familiar with the components of the
change gear system.
A. Spindle Gear: transfers power from the
spindle to the change gear system.
B. forward/Reverse Drive Gears: selects
clockwise or counterclockwise rotation of the
feed rod or leadscrew.
c. Top change Gear: transfers power from the
drive gears to the middle change gear.
D. Middle change Gears: transfers power
from the top change gear to the bottom
change gear. this is a 120t/127t combina-
tion gear.
figure 55. Change gear system.
A
B
C
d
e
g
F
E. Bottom change Gear: transfers power from
the middle change gears to the feed rate
gearbox.
f. feed Direction Lever: selects which for-
ward/reverse drive gear will transfer power
from the spindle gear to the change gears.
G. Pivot Bracket: provides positioning of the
middle change gear so that it correctly mesh-
es with the top and bottom change gears.
Tools Needed Qty
hex Wrench 5mm .............................................. 1
Wrench 16mm ................................................... 1
Wrench 18mm ................................................... 1
To re-configure the change gears:
1. disConneCt lAthe FroM poWer!
2. open the change gear door.
3. use the feed direction lever to engage one of
the drive gears with the spindle gear to keep
the change gears from rotating during the
next step.
4. loosen the hex nut on the top change gear,
the hex nut on the middle change gears, and
the cap screw on the bottom change gear.
5. support the middle change gears, loosen
the hex nut securing the pivot bracket, then
allow the middle change gears and bracket
to swing down.
6. remove the retaining fasteners of the top
and bottom change gears, then remove these
gears.