Atlas Copco QAS28 Yd(S) - Maintenance Schedule and Procedures; Maintenance Schedule Overview; Engine and Alternator Maintenance

INSTRUCTION MANUAL
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(1) More frequently when operating in a dusty environment. Evacuate
dust from the airfilter valve daily.
(2) A Service Bulletin (ASB) dealing elaborately with batteries and
due care is available on request.
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Refer to the engine’s operator manual for full maintenance, includ-
ing instructions for changing the oil and cooling water and replac-
ing the fuel, oil and air filters.
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A 500 V megger is required to measure the alternator insulation re-
sistance.
If the N-terminal is connected to the earthing system, it must be dis-
connected 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 resist-
ance of at least 5 M
Ω.
Refer to the alternator operating and maintenance instructions for
more details.
Before carrying out any maintenance activity, check that the start switch is in position O and that no electrical power is
present on the terminals.
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Daily Initial Small Normal Yearly
50 hours 250 hours 500 hours 2000 hours
SERVICE PAK - With unit 2912 4277 05 2912 4278 06 2912 4279 07
For the most important subassemblies, Atlas Copco has developed service kits that combine all wear parts. These service kits offer you the bene-
fits of genuine parts, save on administration costs and are offered at reduced price, compared to the loose components. Refer to the parts list for
more information on the contents of the service kits.
Coolant level Check Check Check Check Check
Tension and condition of drive belt(s) Check Check Check Replace
Radiator and intercooler fins Check/Clean Check/Clean Check/Clean Check/Clean
Fuel pre-filter/Water separator Check/Drain Check/Drain Check/Drain Check/Drain Check/Drain
Fuel filter element Replace Replace Replace Replace
Fuel injectors Check
Oil level in sump Check Check Check Check Check
Oil pressure on gauge Check Check Check Check Check
Lubrication oil Change Change Change Change
Oil filter(s) Replace Replace Replace Replace
Air cleaner and dust bowl Clean Clean Clean Clean
Air filter element (1) Clean Replace Replace
Safety cartridge Replace
Valve clearance Check/adjust Check/adjust Check/adjust Check/adjust
Oil, fuel and water leaks Check Check Check Check
Mechanical links (e.g. fuel solenoid link) Grease Grease Grease
Level battery electrolyte (2) Check Check Check Check
Condition of vibration dampers Check Check Check Check
Alternator insulation resistance (*) Measure Measure Measure Measure
Tightness of nuts and bolts Check Check
Door hinges and locks Grease Grease
Fixation of hoses, cables and pipes Check Check
Inspection by Atlas Copco Service technician
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