TM-9-2350-311-34-1

TM 9-2350-311-34-1

9-1 PERSONNEL AIRDUCT VENTILATING FAN

— CONTINUED

a. Disassembly — Continued

10 Remove armature (28) from motor field and frame assembly (29).

11 Remove two flat washers (30), bearing (31), flat washer (32), and Iockring (33). Discard Iockring.

12 Remove bearing (34), spacer (35), flat washer (36), and Iockring (37) from armature (28). Discard Iockring.

13 Remove spring tension washer (38) and flat washer (39) from armature (28).

b. Inspection and Repair

1 Inspect impeller (3). Remove nicks with soft stone or fine-mill file. Inspect for cracks. Replace if cracked.

2 Test noise filter (8) for continuity. Replace as required (TM 9-2350-311-20-1).

3 Replace grommet (21).

4 Inspect housing (20). Repair damage as required. Inspect for impeller rubbing on housing. Straighten housing

or remove high spots as required.

5 Inspect shaft key (4). Replace if damaged.

6 Check length on two electrical brushes (25). Length should be 0.685 to 0.825 in. (17.40 to 20.96 mm).

7 Inspect two screws (24). Replace if threads are damaged.

NOTE

If armature or motor field and frame assembly are damaged or defective, replace

motor assembly as unit.

8 Test armature (28) on growler.

9 Test motor field and frame assembly (29) for short or open field windings (TM 9-2350-311-20-1).

10 Inspect spring tension washer (38). Replace if damaged.

11 Inspect two bearings (40 and 41 ) (TM 9-214).

c. Assembly

1 Install flat washer (39) and spring tension washer (38) to motor field and frame assembly (29).

2 Install new Iockring (37), flat washer (36), spacer (35), and bearing (34) to armature (28).

3 Install armature (28) to motor field and frame assembly (29).

4 Install new Iockring (33), flat washer (32), bearing (31), and flat washer (30) to armature (28).

9-4

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