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 1049 of 1275
TM 9-2350-311-20-1
11-22 PERSONNEL HEATER EXHAUST TUBE
This task covers:
a. Removal
b. Installation
Lockwashers (5) (item 95, Appx G)
General mechanic’s tool kit (item 64, Appx H)
Spring washer (item 148, Appx G)
Torque wrench (item 72, Appx H)
Air intake grille open (para 11-8)
Antiseize compound (item 9, Appx D)
Radiator fan access door removed (para 4-5)
Gasket (item 147, Appx G)
a. Removal
1 Remove two screws (1), two flat washers (2), and deflector (3).
2 Remove gasket (4) and spring washer (5). Discard gasket and spring washer.
3 Loosen and slide two clamps (6) onto crossover tube (7).
4 Remove two screws (8), two Iockwashers (9), exhaust tube (10), crossover tube (7), and two clamps (6).
Discard Iockwashers.
5 Remove three nuts (11) and three Iockwashers (12) at bulkhead. Discard Iockwashers.
6 Loosen clamp (13) and separate personnel heater exhaust tube (14) from personnel heater (15). Remove
clamp, sleeve (16), and flange (17).
b. Installation
1 Install exhaust tube (10), two new Iockwashers (9), and two screws (8).
2 Apply antiseize compound to two screws (1) and install new spring washer (5), new gasket (4), deflector (3),
two flat washers (2), and two screws.
3 Install personnel heater exhaust tube (14) at bulkhead with three new Iockwashers (12) and three nuts (11).
4 Install flange (17) and sleeve (16) onto personnel heater (15) outlet. Be sure to install sleeve 0.50 in. (12.7 mm)
onto personnel heater outlet as shown in illustration.
5 Install clamp (13) over flange (1 7), sleeve (1 6), and personnel heater exhaust tube (1 4). Torque screw (18) on
clamp to 45-55 lb-in. (5.1-6.2 N-m).
6 Slide two clamps (6) onto crossover tube (7) and install tube at bulkhead and exhaust tube (10). Tighten
clamps.
11-70
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