TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 1011 of 1275

TM9-2350-311-20-1

11-8 AIR INTAKE GRILLE — CONTINUED

b. Installation-Continued

7

8

9

10

11

12

13

14

15

16

17

18

Lower air intake grille (13).

Install four hex key screws (19) in rear of torsion bar housing clamps (20).

Install four hex key screws (16 and 17) in right end cap (18).

Raise air intake grille (13).

Secure grille (13) in upright position with quick release pin (14). Remove sling and U-bolts.

Apply antiseize compound to four screws (10) and install new packing (12), exhaust deflector (11), and four

screws.

Insert two studs (9) from bottom side of air intake grille (13). Install two handles (8), two new self-locking nuts

(7), and two screws (6).

NOTE

Steps 14 thru 16 apply only when installing a new air intake grille.

Install grille bracket (33) on handle (8) and close grille (13) to determine clearance between grille bracket and

hull.

NOTE

Clearance = number of shims (use next whole number) to be used with bracket.

0.06

Select screw (31) size to be used with bracket (33):

— zero or one shim — use 1.125-in. (2.86-cm) screw

— two or three shims — use 1.25-in. (3.18-cm) screw

— three or four shims — use 1.375-in. (3.49-cm) screw

Open grille (13) and disengage handle (8) from bracket (33).

Install shims (34) as required and bracket (33) on hull with two new Iockwashers (32) and two screws (31).

Install shield and anchor (4) at right end of torsion bar housing (5) with two new self-locking nuts (3), two flat

washers (2), and two screws (1).

11-32