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5.3
Alternator maintenance
procedures
5.3.1
Measuring the alternator
insulation resistance
A 500 V megger is required to measure the alternator
insulation resistance.
If the N-terminal is connected to the earthing system,
it must be disconnected from the earth terminal.
Disconnect the AVR.
Connect the megger between the earth terminal and
terminal L1 and generate a voltage of 500 V. The
scale must indicate a resistance of at least 2 M
Ω
.
Refer to the alternator operating and maintenance
instructions for more details.
5.4
Engine maintenance
procedures
Refer to the engine’s operator manual for full
maintenance, including instructions for changing the
oil and coolant and replacing the fuel, oil and air
filters.
5.4.1
Engine oil level check
For the intervals, see section “Maintenance schedule”
on page 38. Use Atlas Copco engine oil PAROIL E or
PAROIL Extra.
Check the engine oil level every time before the
generator set is used. To do this you must ensure that
the machine stands on an even surface and that the
engine is not running.
1. Check the engine oil level before starting or 10
minutes after stopping the engine.
2. Remove the oil level dipstick (2), wipe it clean
and reinstall it.
3. Take the oil level dipstick out again, and check the
oil level. Oil level reading should be within the
crosshatch marks on the dipstick.
4. If the oil level is too low, remove the oil filler cap
(1) and add the correct Atlas Copco engine oil to
the prescribed level. The filler cap’s position may
vary depending on the engine application.
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