AZIMUTH BORESIGHT KNOB ASSEMBLY

TM 9-1240-322-34&P

TOOLS: 4 oz. ball peen hammer

3/32" pin drive punch

Scraper

SUPPLIES:

Instrument grease (item 1, App. A)

Sealing compound (item 4, App. A)

PERSONNEL: One

REFERENCES: JPG 4lC for: Using sealing compound

Using lubricant

EQUIPMENT CONDITION: Infinity sight on work bench

FRAME 1

Procedure

Step

NOTE

Elevation boresight knob and azimuth boresight knob

are not the same. Azimuth boresight knob has left

handed threads.

Using scraper, remove old sealing compound from insert (1) and housing (2) (JPG).

Put grease on packing (3) and install packing (3) on insert (1) (JPG).

Put a small amount of sealing compound on end of insert (1).

Using fingers, put insert (1) into housing (2).

Using hammer, install pin (4) into housing (2).

using fingers, turn screw (5) counterclockwise into knob (6).

Using fingers, put key (7) into slot on insert (1).

Put shaft of screw (5) into hole of insert (1).

Push shaft (5) through insert (1) making sure key (7) is fully installed in groove on

shaft (5). Push until insert (1) is seated inside of knob (6).

10.

Using punch and hammer, install pin (8) in knob (6).

NOTE

FOLLOW-ON MAINTENANCE

Install receptacle assembly (para 4-11).

Do checkout procedure (Vol I, para 2-2).

END OF TASK

Vol II

4-36