ELEVATION 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 41C for: Using sealing compound

Using lubricant

EQUIPMENT CONDITION: Infinity sight on work bench

FRAME 1

Procedure

Step

NOTE

The elevation boresight knob and azimuth boresight

knob are not threaded the same. The azimuth boresight

knob has left hand 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) into knob (6).

Using fingers, put key (7) in 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 of shaft

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

Vol II