c. Assemble operating mechanism assembly

5-47. ASSEMBLY OF MAIN DISCONNECT SWITCH S120.

TM-9-6115-604-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 5 Kw. 1 Phase-2 Wire 1 Phase -3 Wire 3 Phase -4 Wire 120. 120/240 and 120/208 Volts Manual
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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. 5-89

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