Nilfisk-ALTO Nilfisk C 100.4 - Manual (Page 12)

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6.3 Cleaning of machine
vents
The machine should be kept
clean so as to let cooling air
pass freely through the ma-
chine vents.
To ensure an easy connec-
tion and that o-rings do not dry
up, the couplings should be
greased regularly. 6.4 Greasing of couplings