Repair of Left Gun Frame Assembly.

TM 9-4931-583-30&P

(4) Inspect each part. Any discrepancy,

bolt heads contact shaft arms. Do not tighten at

except cleanliness is cause for replacement.

this time.

(e) Install right gun frame assembly on

Warped or bent.

(a)

boresight assembly and self-align per alignment

(b)

Damage.

instructions.

c. Repair of Left Gun Frame Assembly.

(c)

Loose or missing parts.

(1) Remove frame assembly (8, figure 1-1)

(d) Threaded items for thread damage.

from boresight assembly by disconnecting frame

assembly fitting and removing assembly.

(e) Cleanliness. Clean, if required, per

paragraph 2 - 9 a .

(2) Repair dents as listed in paragraph b.(2)

above.

(5) Assemble alignment assembly. Refer to

figure C-4 for breakdown and parts identification

(3) Disassemble alignment assembly as

numbers unless otherwise indicated.

required to replace failed part. For disassembly

instructions, refer to paragraph b.(3) above.

(a) Thread nut (12) onto setscrew (14).

(4) Inspect each part. Refer to paragraph

(b) I n s t a l l s e t s c r e w i n b a s e p l a t e

b.(4) above.

assembly (15) center hole.

(5) A s s e m b l e a l i g n m e n t a s s e m b l y ,

(c) Position column assembly (16) center

following steps in paragraph b.(5) above.

hole over setscrew rounded head with one shaft arm

between raised plates of plate assembly.

(6) A d j u s t l e f t g u n a l i g n m e n t b l o c k

assembly on shaft arm following paragraph b.(6)

(d) Measure between the three arms of shaft

above. In paragraph b.(6)(e), install left gun frame

and adjacent surface of base plate assembly (figure 3-1,

assembly.

view A). Adjust nut and setscrew until measurement

equals 0.13 inches.

d. Repair of Forward Gun Frame

Assembly. Refer to figure C-6 for breakdown and

(e) I n s t a l l t w o s e t s c r e w s ( 1 0 ) a n d

parts identification numbers unless otherwise

nuts (11) in base plate assembly, centering arm of

indicated.

shaft between plates of base plate assembly.

(1) Remove frame assembly (15, figure 1-1)

(6) Adjust block on shaft using following steps

from boresight assembly by disconnecting frame

and figure 3-1:

assembly and removing assembly.

(a) Reconfirm that shaft arm is at midpoint

(2) Repair dents as listed in paragraph b.(2)

in base plate, adjusting, if necessary, rotary adjust-

above.

ment screws (6) and nuts (5) until arm is at midpoint.

(3) Disassemble alignment assembly as

(b) Reconfirm that space between the

required to replace failed part. For disassembly

three shaft arms and adjacent surface of baseplate

instructions, refer to paragraph b.(3) above.

assembly is 0.13 inches. If necessary, adjust screw

(8) through nut (9) (View A) until dimension is met.

(4) Inspect each part. Refer to paragraph

b.(4) above.

(c) Insert three bolts and washers (1 and

2, figure C-4) through holes of collar and baseplate

(5) A s s e m b l e a l i g n m e n t a s s e m b l y

assembly and fasten alignment assembly to frame

following steps in paragraph b.(5) above.

assembly (18).

(6) Adjust block assembly (6, figure C-6) on

(d) Turn bolts (13) counterclockwise until

shaft arm, following paragraph b.(6) above.

3-2