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Page Title:
Table 3-1. Operator and Crew Preventive Maintenance Checks and Services |
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 TM 3-6665-225-12
Table 3-1. Operator and Crew Preventive Maintenance Checks and Services
D-During Operation
A-After Operation
B-Before Operation
Time required: 1.2
Time required: 0.1
Time required: 0.9
Work
Interval and
Item to be inspected
time
sequence no.
procedure
(M/H)
B
D
A
M43 DETECTOR UNIT
1
5
0.1
Check exterior for damaged, loose, or missing parts.
6
0.1
2
Check that RAINSHIELD assembly and FLOWMETER are installed in han-
dle and are not damaged.
3
6.1
Separate bottom case assembly from detector unit assembly. Inspect for cor-
0.1
roded, bent, or broken heater contacts (para 2-6a(3)). Check that detector
cell is properly installed (para 2-6a(4)). Check that pump assembly is se-
curely installed (para 2-6a(6)). Check that electronic module is securely in-
stalled (para 2-6a(7)). Check for evidence of solution in bottom case as-
sembly and around solution reservoir assembly. Wipe bottom case assem-
bly dry.
0.1
Check pump assembly accumulated hours (DA Form 2408-1) (fig. 2-9). Re-
4
place pump assembly if accumulated hours will exceed 1440 hours during
mission (para 3-14).
Perform appropriate shutdown procedures (para 2-13).
7
0.1
Enter operational hours on DA Form 2408-1 (para 2-19).
0.1
8
M42 ALARM UNIT
Inspect exterior for damaged, loose, or missing parts.
1
0.1
3
Perform preoperational procedures (para 2-6b).
2
0.1
BA3517/U BATTERY
Inspect for damage (para 2-6e(1)).
1
0.1
2
BB501/U BATTERY AND M168 CABLE
Inspect and service in accordance with TM 11-6140-203-15-3 (para 2-68(2)).
0.1
1
M10 POWER SUPPLY
0.1
inspect and service in accordance with TM 3-6665-261-14.
3
2
1
VEHICULAR INSTALLATIONS
0.1
Check that mounting hardware is secure to vehicle. Tighten loose compo-
4
1
nents.
0.1
Check that cable connections are secure.
2
0.1
Check for frayed insulation or other damage such as bent or defective con-
5
3
nector pins.
3-6. Mandatory Component Replacement
1-2) and the M42 alarm unit (fig. 1-5) that must be
Intervals
replaced periodically by the operator. The replace-
ment intervals are based on periods of operation.
Table 3-2 lists parts of the M43 detector unit (fig.
Table 3-2. Mandatory Component Replacement Intervals
Replace after operating for
Component
to be
24 hours
8 hours
End Item
Less than
replaced
Reference
per day
or less
12 hours
per day
per day
M43 detector
60 days
Pump assembly
Reservoir
12 hours
daily
unit
daily
daily
Air filter
12 hours
daily
30 days
M42 alarm
BA3030 or
30 days
30 days
BB3202/UF
I
batteries
1440 hours after last 1440-hour service. Refer to daily log DA Form 2408-1 (para 2-19).
During operation in sand or dust conditions, replace air filter in accordance with table 2-1.
Section III. OPERATOR'S TROUBLESHOOTING
3-7. Scope
component, unit, or system is followed by a list of
a. This section contains troubleshooting or mal-
tests or inspections necessary for you to determine
function information and tests for locating and cor-
probable causes and suggested corrective actions
recting most of the troubles which may develop in
for you to remedy the malfunction.
the M43 detector unit and the M42 alarm unit. Each
b. This manual cannot list all possible mal-
malfunction or trouble symptom for an individual
Change 2
3-21
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