Section 2-3. OPERATION OF AUXILIARY EQUIPMENT

Figure 2-15. Installation of tow shackles, tow pintle, tow cables or tow bar

TABLE 2-6. OPERATION OF M8A3 AIR FILTER UNIT

TM-9-2350-230-12 Armored Reconnaissance/Airborne Assault Vehicle Full-Tracked 152 MM M551 2350-873 5408 Manual Page Navigation
42

C8, TM 9-2350-230-12

Section 2-3. OPERATION OF AUXILIARY EQUIPMENT

2-4. Operation Instructions

The following tables and illustrations pro-

vide auxiliary equipment operating instruc-

tions.

TABLE 2-6. OPERATION OF MBA3 AIR FILTER UNIT

STEP

PROCEDURE

FIG/ITEM

BEFORE OPERATION

NOTE. The MBA3 air filter unit is used in connection with a tank

protective mask for protection against toxic gases and in extremely

dusty conditions to remove dust from air breathed by crew members.

WARNING: 1. In toxic gas attack, don mask immediately before

beginning operation of filter unit.

2. The air filter unit will not protect user against car-

bon monoxide.

3. Do not supply air from filter unit to masks when

vehicle interior is below +20 degrees. Injury to user's lungs may

result.

Perform before-operation preventive-maintenance checks and services

(table 4-1, step 43).

Unstrap carriers from stowed positions and remove masks. 2-16/1,2

Don masks and adjust face pieces.

Remove commander's, gunner's, and loader's air purifier-to-canister 2-16/4

hoses from stowage bag.

Remove driver's air purifier-to-canister hose from spring clips and 2-16/8,9

connect to canister.

NOTE. If the air filter unit is to be used by fewer than four persons, 2-16/11

disconnect the unused hose from the air purifier. Cover the unused

outlet or outlets on the air purifier with air flow control caps. When

only three outlets are used, the fourth outlet is covered with an air-

flow control cap without a center hole. When less than three outlets

are used, one of the holes is covered with an airflow control cap with-

out a center hole and the other outlets are covered with airflow control

caps with center holes.

Remove spring clip from air purifier housing.

2-16/12

Remove caps from air purifier and connect commander's, gunner's, and

2-16/11

loader's air purifier-to-canister hoses.

Turn on air filter unit with rheostat knob located on loader's control 3-1/A

box, and increase to maximum airflow. If excessive airflow around

face piece causes discomfort, reduce the flow accordingly with

rheostat knob.

AFTER OPERATION

Remove masks, place in carriers and stow.

2-16/1,5

Turn air filter unit COMPLETELY OFF (rheostat knob counterclockwise).

3-1/A

Uncouple commander's, gunner's, and loader's air purifier-to-canister

2-16/4, 6

hoses and place in stowage bag.

2-24

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