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-84-
Model G0740 (Mfg. Since 11/12)
Tools Needed: Qty
Hex Wrenches 6mm .......................................... 1
Hex Wrench 8mm .............................................. 1
Wrench 17mm.................................................... 1
Dead Blow Hammer .......................................... 1
Gap Removal
1. Remove the four gap-bed cap screws, shown
in Figure 136.
The gap insert directly under the spindle (see
Figure 135) can be removed to create additional
space for turning large diameter parts.
The gap insert was installed, then ground flush
with the bed at the factory to ensure a precision
fit and alignment. Therefore, if the gap insert is
removed, it may be difficult to re-install with the
same degree of accuracy.
Figure 135. Gap insert.
Gap Insert
Gap Insert Removal
& Installation
2. Remove the two way-end cap screws.
3. Tighten the two dowel-pin jack nuts until the
pins are pulled free from the gap insert.
4. Tap the outside of the gap insert with a dead
blow hammer to loosen it, then remove it.
Figure 136. Fasteners holding gap in place.
Way End Cap
Screw
Dowel Pin
Jack Nut
Gap-Bed
Cap Screw
5. Install all fasteners and lightly snug them in
place.
6. Mount a dial indicator with a magnetic base to
the top of the saddle to indicate alignment.
7. First test the peak of the two prisms of the
gap insert that the saddle rides on, then test
the flanks of the prisms.
8. Tighten the gap bed cap screws in an alter-
nating manner and tap the side of the gap
insert into alignment.
9. Inspect the gap alignment 24 hours later to
make sure the gap is still aligned. If neces-
sary, loosen the gap bed cap screws and
repeat Steps 7–8 until the insert is properly
aligned.
Gap Installation
1. Use mineral spirits and a clean lint-free rag
to clean the mating surfaces of the gap, bed,
and ways. If necessary, stone the mating sur-
faces to remove scratches, dings, or burrs.
2. Wipe a thin layer of light machine oil on the
mating surfaces.
3. Place the gap insert into the gap and use a
dead-blow hammer to align the insert with the
lathe bed.
4. Back off the dowel pin jack nuts, and lightly
tap the dowel pins back into their respective
holes until they are seated. This process will
further help align the gap insert and bed mat-
ing surfaces.