Gardner Denver L4-5C Original User Manual page 41

Before draining, adding, or changing the lubricant oil in the compressor, be
aware of the following hazards associated with these tasks:
Air/oil under pressure will cause severe personal injury or death. Shut down
compressor, relieve system of all pressure, disconnect, lockout and tagout
power supply to the starter before removing valves, caps, plugs, fittings, bolts
and filters.
Compressor, air/oil reservoir, separator chamber and all piping and tubing may
be at high temperature during and after operation.
Use of improper lubricants will cause damage to equipment. Do not mix
different types of lubricants or use inferior lubricants.
Improper equipment maintenance with use of synthetic lubricants will damage
equipment. Oil filter and oil separator change intervals remain the same as for
AEON 4000, See "Maintenance Schedule".
High temperature operation can cause damage to equipment or personal injury.
Do not repeatedly restart the unit after high temperature stops operation. Find
and correct the malfunction before resuming operation.
Read the oil level when the unit is shut off for an accurate measurement.
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