—
Figure 12: Spring Removed Up and Out of Assembly.
—
Figure 13:
Shunt Trip Screw to be Unscrewed
—
Figure 14: 2 Setscrews
Shunt Trip Screw
¼-in Setscrews
4
12.
13.
14.
15.
17.
18.
19.
20.
assembly to the
handle side of the assembly wall (Figure
10). If Electric Operator is installed, then only the front
and handle side bolts will need to be removed because
the rear bolt will not be installed.
Loosen any screws on the front face of the
accessories(Figure 13) until the screws are fully loosened
from the housing, and then loosen the ¼-in setscrews
located on the side of the shunt trip guide housing (Figure
14). This will allow the guide housing and accessories to be
removed.
Using the supplied
5
/
32
Allen Wrench [6], unscrew the long
bolt (BH HEX SKT
1
/
4
-20 X 3.56 SCREW) located on the
structure as seen in Figure 15 from the stop block but it is
not necessary to fully remove from the Spacer Side Frame
Pin tubing with collar that it passes through.
Wedge a flat head screwdriver between the spring frame
bearing and shaft and then rotate 90 degrees in order to
deflect the left side of the spring assembly wall outward
(Figure 16) to allow for the removal of the stop block
(Figure 17).
Discard the currently installed stop block, replace with the
new stop block assembly [3], and secure with the three
new Bolts with nylon patch [4] with Steel Spring Lock
Washers [5] on each to 65 inch-pounds min. For models
with the Electric Operator only replace the front and
handle side bolts. Ensure that the holes in the new stop
block align with the screw holes in the assembly to avoid
installing the new stop block incorrectly. Looking at the
block with the stop block gasket facing down, there
should be three holes on the left side of the stop block and
two holes on the right side.
Screw in the long bolt as seen in Figure 15 with a
5
/
32
Allen Wrench [6] to 90 inch-pounds min., and secure the
Shunt Trip guide casing and unit back into place.
Align the charging spring back in position, as shown in
Figure 8.
Operate the breaker charging handle five times. Remove
the spring assembly screw[1] and spacer[2] from the end
of the spring.
Press on the close de-latch lever with a screwdriver,
rotating it clockwise as seen from the handle side of the
breaker, as shown in Figure 19. Then, with another
screwdriver, rotate the close de-latch mechanism to
release the charging pawl.
Rotate the trip de-latch lever fully back against the frame,
as shown in Figure 20, while pressing down on the cradle
to release the closing mechanism. While holding the cradle
down, rotate the spring forward against the stop block.
16.
