Atlas Copco QAS 14, Instruction Manual

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Notes:
In highly dusty environments, these service intervals
do not apply. Check and/or replace filters and clean
radiator on a regular basis.
(1) During engine break-in, change the oil and oil
filter for the first time after max. 50 hours of
operation.
(2) Air filter should be replaced sooner when the unit
is operating in a dusty environment.
(3) Rocker cover gaskets can be re-used after valve
clearence.
(Rocker cover gasket: QAS 14 - 2913 3074 00 &
QAS 20 - 2913 3075 00).
(4) Adjust/replace coolant as necessary.
Engine maintenance
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.
(*) 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 5 M

.
Refer to the alternator operating and maintenance
instructions for more details.
Engine fuel specifications
For fuel specifications, please contact your Atlas
Copco Customer Center.
Engine oil specifications
High-quality, mineral, hydraulic or synthesized
hydrocarbon oil with rust and oxidation inhibitors,
anti-foam and anti-wear properties is recommended.
The viscosity grade should correspond to the ambient
temperature and ISO 3448, as follows.
It is strongly recommended to use
Atlas Copco branded lubrication oils.
!
Engine Type of lubricant
between -15°C (5°F)
and 40°C (104°F)
PAROIL E
between -25°C (-13°F)
and 40°C (104°F)
PAROIL Extra
Never mix synthetic with mineral
oil.
Remark:
When changing from mineral to
synthetic oil (or the other way
around), you will need to do an
extra rinse.
After doing the complete change
procedure to synthetic oil, run the
unit for a few minutes to allow good
and complete circulation of the
synthetic oil. Then drain the
synthetic oil again and fill again
with new synthetic oil. To set correct
oil levels, proceed as in normal
instruction.
!