Instruction Manual DS Series Senator Industrial Air Compressors
2024-10-11 © Glenco Air & Power Pty Ltd 30
5.0 Maintenance
Before performing any maintenance work on the compressor, switch off the unit, isolate and
tag-out the power supply, carefully release any residual air pressure from the internal air-oil
receiver and any connected downstream piping in the user’s network, and close the air outlet
valve. And if possible, allow the unit to cool down if it’s been running.
5.1 Lubricating Oil
The lubricating oil has a critical effect on the performance and service life of a rotary screw air
compressor. If incorrect lubricating oil is used, it will cause severe damage to the compressor.
The compressor is supplied pre-filled with mineral based, ISO 46 grade, premium quality
compressor oil that has an operating life of up to 2,000 hours under normal conditions having
an air end discharge temperature of ≤ 100°C.
Premium quality compressor oil from other reputable manufacturers may be substituted.
It is permissible to use mineral based, semi-synthetic or full synthetic compressor oils, but they
should NEVER be mixed. If changing between these different types of compressor oil, follow
the flushing procedure as recommended by the oil manufacturer.
It is always best to stick with one brand and type of compressor oil from the first oil change
onwards.
Notwithstanding the same reference to ‘ISO 46 grade’, never use hydraulic oil in place of
compressor oil. Hydraulic oil does not have the same additives as those blended into compressor
oil, notably for anti-foaming, and this will cause the compressor to malfunction.
5.1.1 Oil Change Interval
a. The initial oil change should be performed after the compressor operates for about 500
running hours or 3 months, whichever occurs first.
b. If mineral-based lubricating oil is used, it should be replaced every 1,000 to 2,000 hours. If
synthetic-based oil is used, it should be replaced every 4,000 to 8,000 hours. In either case,
the lubricating oil should be replaced at least every 12 months if not sooner according to
the running hours limit.
c. If an oil sample analysis indicates that the lubricating oil needs to be changed, it should be
done promptly.
d. If the operating conditions are poor and the air end discharge temperature is often 95°C or
higher, the oil change period should be halved.
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