5. Start the engine. Inspect the air lines for leaks.
i01917577
Instrument Panel - Inspect
SMCS Code: 7451-040
Inspect the instrument panel for good condition.
Perform the self test. All of the warning lamps should
illuminate. If a warning lamp does not illuminate,
replace the bulb immediately. If the alarm does not
sound, investigate the problem and correct the
problem.
Check the condition of all of the gauges. If a gauge is
broken, repair the gauge or replace the gauge
immediately.
Frequently monitor the gauges during normal
operation.
Record the data in a log. Compare the new data to
the data that was previously recorded. Comparing
the new data to the recorded data will help to
establish the trends of engine performance. A gauge
reading that is abnormal may indicate a problem with
operation or a problem with the gauge.
i01189694
Insulation - Test
SMCS Code: 4453-081; 4454-081; 4457-081; 4470-
081
Recommended Periodic Insulation
Tests
The high voltage that is produced by an operating
generator set can cause severe injury or death.
Before performing any maintenance or repairs,
ensure that the generator will not start.
Place the engine control switch in the ““OFF”” posi-
tion. Attach ““DO NOT OPERATE”” tags to all start-
ing controls. Disconnect the batteries or disable
the starting system. Lock out all switchgear and
automatic transfer switches that are associated
with the generator.
Periodically, use a megohmmeter to check the
insulation resistance of the generator's main stator
winding. The frequency of this test is determined by
the generator's environment. Previous megohmmeter
readings will also determine the frequency of this
test.
Test the main stator windings with a megohmmeter in
the following situations:
• The generator set is started for the first time.
• The generator set is removed from storage.
• The generator set is operating in a humid
environment. Test every three months.
• The generator set is not protected from the
elements in an enclosed area. Test every three
months.
• The generator set is installed in an enclosed area.
This area needs to be low in humidity and this
area needs to have steady temperatures. Test
every six months.
• The generator set has not been run under load for
three months. Test the generator set weekly. Use
space heaters around the generator set if the
generator is exposed to a sea water environment
or if the humidity is above 75%. Also use space
heaters if a test result was below 3 megohms.
Space heaters must be used whenever the generator
set is not under load. Space heaters must also be
used whenever salt is present or whenever high
humidity is present. Using a space heater in this
fashion is the only way to maintain megohmmeter
readings above one megohm. Use space heaters
only when the generator is not running.
Recommended Periodic Insulation
Test Procedure
Personal injury or death can result from
electrocution.
The megohmmeter is applying a high voltage to
the circuit.
To avoid electrocution, do not touch the instru-
ment leads without first discharging them. When
finished testing also discharge the generator
windings.
1. Take the generator out of service.
2. Visually inspect the generator for moisture. If
moisture exists, do not megger. Dry the unit first.
Refer to Special Instruction, SEHS9124, “Cleaning
and Drying of Electric Set Generators”.
3. Inspect the installation. Determine the equipment
that will be tested by the 9U-6003 Megohmmeter.
4. Discharge the capacitance of the windings.
5. Disconnect “T0” from ground.
6. Disconnect the regulator sensing lead wires: “20” ,
“22” and “24” .
SEBU7125-13
141
Maintenance Section
Instrument Panel - Inspect
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