Atlas Copco XAS 185 CDU T4 Original Instructions Manual page 23

Rear-end of compressor upwind
Locate rear-end of the compressor upwind (see figure),
away from contaminated wind-streams and walls. Avoid
recirculation of exhaust gasses from the engine. This can
cause overheating and engine power decrease.
The compressor oil lifetime will be shortened when the
compressor air inlet air is contaminated.
Remove transportation supports before
mounting compressor on truck.
Before moving the compressor, switch it off.
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