TM 9-4120-405-13&P
Table 2-1. Operator Preventive Maintenance Checks and Services (cont.)
B - BEFORE
D - DURING
A - AFTER
W - WEEKLY
M - MONTHLY
Procedures:
Interval
Check for and have
Equipment is
Item
Item to be
repaired, filled or adjusted
Not Ready/
No.
BDAWM
Inspected
as needed
Available If:
11
Electrical
Check for secure mounting,
Loose, missing, or dam-
Connections
frayed or damaged wires.
aged wires
12
Fuel Gauge
Check for sufficient fuel for continuous
operation.
13
Engine Oil
Check oil filler dipstick for proper
oil level. Add oil as required.
14
Air Cleaner
Check indicator for restricted air
Air cleaner is missing or
Indicator
cleaner. If red warning indicator
unserviceable. Indicator
becomes visible, clean or replace
indicates red.
dust cap and filter element (Refer
to TM 5-6115-585- 12).
15
Fuel Strainer
Drain water and sediment from
and Filters
strainer, primary and secondary
filters. Allow to drain until fuel
runs clean. (Refer to TM
5-6115-585-12).
16
Gauges and
Check gauges and instruments for
Instruments
proper generator set operation.
a. Battery
Normal indication: yellow area
Battery indicator not in
Indicator
while charging, green area when
green or yellow area
fully charged.
b. Frequency
Normal indication: 60 Hz (red line)
Proper frequency cannot
Meter
when generator is loaded.
be maintained.
c. Current Meter
Indicates percent of rated output
current per phase, as selected
switch. Meter indication must not
exceed 100% or more than 5%
load difference between phases
(Refer to TM 5-6115-585-12).
d. Voltmeter
Indicates generator output
Desired voltage cannot
voltage: 120, 208 or 240 volts,
be obtained.
depending on load connections,
and as selected on amps-volts
transfer switch.
e. Oil Pressure
Indicates engine oil pressure. Nor-
Oil pressure drops
Gauge
mal indication is 25 psig.
below 15 psig.
2-8
