3. Rotate the cylinders to obtain a clearance of approximate-
ly 0.005 inch between the cylinders and the stop levers.
4. Tighten the nuts on the bolts.
5-5.3 Moving Contact Adjustment
The contact assemblies are adjustable for the amount of en-
gagement only. The lead of the arcing contacts over the main
contacts is fixed. The correct engagement of the contacts is
achieved when the vertical faces of the main fixed contacts
and the fixed contact cage are parallel.
For the DSII-308, this is obtained by the adjusting nuts
located on the insulating link stud above and below the pivot
block (Figures 3-4 and 3-5). These nuts are self-locking and
must be tight when the adjustment is complete.
The moving pole of the DSII-516/620 is adjusted by rotating
the insulating link after the locknut has been loosened (Fig-
ure 3-6). Tighten the locknut securely after the adjustment
has been completed.
The DSII-632 and DSII-840/850 have two adjusting studs on
each pole.
Both adjusting studs must be moved together to retain the
parallelism. Refer to the Renewal Parts Data Book if a picto-
rial reference is needed to make the adjustment. A spring
type locking clip holds the adjustment for the DSII-632. For
the DSII-840/850, locking nuts similar to those used with the
DSII-516/620 hold the adjustments.
5-5.4 Levering Mechanism Adjustment
The complete levering mechanism is shown in Figure 5-7.
If the traveling stop nut on the rear of the worm shaft has
been removed, it must be replaced in the exact position
with respect to the worm gear position for proper interlock
operation. This is achieved when the threaded worm shaft
bottoms in the stop nut and the interlock cam is in the con-
nected position (Figure 4-12a). The shutter interlock pin will
then drop to its normal position beneath the lobe of the cam.
The retaining clamp ring also operates the position indicator
and may be slipped into its groove in the stop nut. The stop
nut is prevented
The DSII-632 and DSII-840/850 have two adjusting studs on
each pole.
Both adjusting studs must be moved together to retain the
parallelism. Refer to the Renewal Parts Data Book if a picto-
rial reference is needed to make the adjustment. A spring
type locking clip holds the adjustment for the DSII-632. For
the DSII-840/850, locking nuts similar to those used with the
DSII-516/620 hold the adjustments.
5-5.4 Levering Mechanism Adjustment
The complete levering mechanism is shown in Figure 5-7.
If the traveling stop nut on the rear of the worm shaft has
been removed, it must be replaced in the exact position
with respect to the worm gear position for proper interlock
operation. This is achieved when the threaded worm shaft
bottoms in the stop nut and the interlock cam is in the con-
nected position (Figure 4-12a). The shutter interlock pin will
then drop to its normal position beneath the lobe of the cam.
The retaining clamp ring also operates the position indicator
and may be slipped into its groove in the stop nut. The stop
nut is prevented
Levering Worm Gear
Levering Shaft
Traveling Stop Nut
Figure 5-7 Levering Mechanism
Effective July 2010
Instructional Book
IB694C694-03
58
eaton corporation
www.eaton.com
