Atlas Copco QAS 150-200 Cud, Instruction Manual

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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.
Specifications PAROIL
PAROIL from Atlas Copco is the ONLY oil tested
and approved for use in all engines built into Atlas
Copco compressors and generators.
Extensive laboratory and field endurance tests on
Atlas Copco equipment have proven PAROIL to
match all lubrication demands in varied conditions. It
meets stringent quality control specifications to
ensure your equipment will run smoothly and
reliably.
The quality lubricant additives in PAROIL allow for
extended oil change intervals without any loss in
performance or longevity.
PAROIL provides wear protection under extreme
conditions. Powerful oxidation resistance, high
chemical stability and rust- inhibiting additives help
reduce corrosion, even within engines left idle for
extended periods.
PAROIL contains high quality anti-oxidants to
control deposits, sludge and contaminants that tend to
build up under very high temperatures.
PAROIL's detergent additives keep sludge forming
particles in a fine suspension instead of allowing them
to clog your filter and accumulate in the valve/rocker
cover area.
PAROIL releases excess heat efficiently, whilst
maintaining excellent bore-polish protection to limit
oil consumption.
PAROIL has an excellent Total Base Number (TBN)
retention and more alkalinity to control acid
formation.
PAROIL prevents Soot build-up.
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.
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.
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