4.4 Shutdown procedure
On compressors using gasoline drive, close hand lever on carburetor and turn "On/Off" switch off.
Close fuel cylinder valve and drain condensate out of compressor. In addition, check oil level of
compressor, gasoline level in engine tank and carry out current service (§ 4.8).
4.5 Preparation for extended storage
Prior to extended storage, the compressor should run a few minutes against a small backpressure of
approximately 300PSI (20 bar), by partly closing filling valve in order to prevent possibility of corrosion.
Open condensate drain valve again, then close them to prevent loss during transportation.
4.6 Preservation of compressor
Remove intake air filter cartridge. Start compressor and slowly fill 10 to 20 cm3 of MAXLUBE 501
synthetic oil into intake piece of compressor. Keep filling valve open and condensate drain valve
closed. Operate unit for approximately 1 minute. Close filling valves and open condensate drain valves.
Decompress all stages and then close all valves.
In cases of prolonged storage periods, run unit every 3 months. Lubricating oil loses its efficiency
during prolonged idle periods in the compressor and motor. This requires draining and replacing with
fresh oil at least once a year.
4.7 Maintenance and air tightness test
Besides the standard stipulated service works (§ 4.8) we recommend you clean the compressor at
regular intervals to notice any oil leakage and impairment to the efficiency of the cooling system
resulting from dirt on cooler coils and fins. Test air tightness by regularly brushing all fittings, valves and
tubing of the condensate drain with soap-water or with leak test spray.
Air leaks considerably impair the output of the compressor.
4.8 Service, service timetable
4.8.1 Oil level check, change of oil
Check oil level daily before putting the unit into operation. Oil level must be between minimum and
maximum of transparent tube on the crankcase, behind the filter or on the front, oil level sight glass for
cabinet models. Oil level must not be too high because excessive oil can result in over-lubrication and
coking of the valves. When oil level is too low, oil thrower pins do not any longer dip into oil, lubrication
stops and the unit is destroyed.
Oil change:
first oil change after 15 operating hours, further oil changes every 50 operating hours. If
the operating hours indicated above are not reached within 5 months, oil must be changed after the
season or before storing for the winter. Do not use oils of different brands at the same time: do not use
openly stored oil, but only from original oilcans.
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