TM 9-6115-604-34
NAVFAC P-8-633-34
NOTE
Coat hinge and jaw contact between blades with number OX-1 P, Grade E, before installing
switch blades.
(5)
Attach completed base (18) and blade (19) assembly to the switch frame (2) using hexagon head bolts (14)
and flat washers (15) through the base (18) mounting holes. Secure at rear of frame (2) with lockwashers
(16) and hexagonal nuts (17). Open each mounted blade assembly and adjust the elastic stop nuts (21) at
the blade pivot points until blades cease to drop due to their own weight.
(6)
Attach free ends of connecting links (8) to the shaft assembly (4) using pins (7) and secure with retaining
rings (6). Ensure that grooved shaft end is positioned to the right to accommodate coupling with the
operating mechanism assembly (1). Install flat washer (9) at other end of shaft assembly and thread
through pivot hole on the bearing plate. Mount bearing plate (9) on frame using hexagon head bolts (10),
lockwashers (11), and hexagonal bolts (12). If bearing plate was not removed, install flat washer (9) at
pivot end of shaft assembly (4), and position through bearing plate (9) before attaching connecting links (8)
from blades.
c.
Assemble operating mechanism assembly as follows:
(1)
Install two housing spacer studs (2, Figure 5-36) on the interior side of outer housing plate (13) and secure
with hexagonal nuts (1) on plate exterior side.
(2)
Install two spacers (8) on drive spring subassembly (10) shaft and one spacer (9) on drive lever
subassembly (11) shaft. Install drive spring and lever assembly through the outer housing plate (13) with
the drive lever subassembly (11) flush against the plate.
(3)
Install upper and lower latches (5) in latch pivot holes on outer housing plate (13). Position latches so that
the spring catch dowel on both latches (6 and 7) is confined within the circular ports on the outer housing
plate (13).
(4)
Align corresponding mounting holes on inner housing plate (12) over housing spacer studs (2), spring drive
subassembly (10) shaft, and latch (6 and 7) pivot points. Mount inner housing plate (12) using hexagonal
nuts (1) on threaded ends of the housing spacer studs (2) going through the plate (12). Tighten the
hexagonal nuts (1) only to the extent required to hold the plate in place.
(5)
Install one latch spring (5) each over upper and lower housing spacer bushings (4). Position upper spacer
bushing (4) so that when fully installed inside the housing, the attached latch springs (5) straight end will be
flush against the spring catch dowel on the upper latch; and its curved end will be both flush against the
housing plate interior and pressing against the upper housing spacer stud (2).
(6)
Position upper housing spacer bushing (4), with spring (5) attached, in its place between the two housing
plates (12 and 13). Apply sufficient pressure when aligning spacer bushing with the bolt mounting holes to
overcome spring tension once the spring ends are positioned as described step (5), above. With the
spacer bushing (4) bore and bolt mounting holes aligned, push hexagon head bolt (3) through exterior side
of the outer housing plate (13), until it goes through the inner housing plate (12). Hold temporarily in place
with hexagonal nut (1) on plate exterior.
(7)
Repeat installation procedure for lower housing spacer bushing, ensuring that the lower latch spring's
straight end is pressing against the spring catch dowel on the lower latch (6) and flush against the lower
housing spacer stud (2).
(8)
Install coupling key (18) on drive lever assembly (11) shaft Align sprocket (17) with shaft and install.
Secure sprocket (17) in place with flat washer (16) and new retaining ring (15).
d.
Install operating mechanism assembly (1, Figure 5-35) on switch frame (2) as follows:
(1)
Open or dose switch blades as required to couple operating mechanism (1) with shaft assembly (4). Slip
shaft coupling sleeve (5) over free end of shaft assembly. Align hexagonal bolts (3), Figure 5-36) on
operating mechanism assembly with mounting holes on switch frame (2, Figure 5-35) while at the same
time coupling the shaft assembly with drive shaft on the operating mechanism assembly (1). Mount the
operating mechanism assembly by tightening hexagonal nuts (3).
e.
Install main disconnect switch S120 and handle assembly in accordance with the Operator and Organizational
Maintenance Manual.
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